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1

Advanced Hydropower Turbine Systems  

NSDL National Science Digital Library

The Idaho National Engineering and Environmental Laboratory manages this program, which explores and develops technology to improve current hydropower resources. Although hydroelectric generation systems produce far fewer harmful emissions than other options, they can have a detrimental effect to downstream water quality. Fish are very susceptible to injury or death from turbine systems. Several reports from the Advanced Hydropower Turbine Systems program, addressing these issues and documenting research into possible solutions, are available from this site. One of the most interesting projects of the program is the Sensor Fish. This device is used "to characterize physical conditions fish experience during passage through hydro turbines, spill stilling basins, high-discharge outfalls, and other dam passage routes."

2002-01-01

2

21st century advanced hydropower turbine system  

SciTech Connect

While hydropower turbine manufacturers have incrementally improved turbine technology to increase efficiency, the basic design concepts haven`t changed for decades. These late 19th and early 20th century designs did not consider environmental effects, since little was known about environmental effects of hydropower at the time. The U.S. Department of Energy (DOE) and the hydropower industry recognize that hydropower plants have an effect on the environment and there is a great need to bring turbine designs into the 21st century. DOE has issued a request for proposals (RFP) that requested proposers to discard conventional thinking, search out innovative solutions, and to visualize innovative turbines designed from a new perspective. This perspective would look at the {open_quotes}turbine system{close_quotes} (intake to tailrace) which will balance environmental, technical, and economic considerations. This paper describes the DOE Advanced Hydropower Turbine System Program.

Brookshier, P.A.; Flynn, J.V.; Loose, R.R.

1995-11-01

3

21st century advanced hydropower turbine system  

Microsoft Academic Search

While hydropower turbine manufacturers have incrementally improved turbine technology to increase efficiency, the basic design concepts haven`t changed for decades. These late 19th and early 20th century designs did not consider environmental effects, since little was known about environmental effects of hydropower at the time. The U.S. Department of Energy (DOE) and the hydropower industry recognize that hydropower plants have

P. A. Brookshier; J. V. Flynn; R. R. Loose

1995-01-01

4

21st century advanced hydropower turbine system.  

National Technical Information Service (NTIS)

While hydropower turbine manufacturers have incrementally improved turbine technology to increase efficiency, the basic design concepts haven't changed for decades. These late 19th and early 20th century designs did not consider environmental effects, sin...

P. A. Brookshier J. V. Flynn R. R. Loose

1995-01-01

5

Status of the U.S. Department of Energy's Advanced Hydropower Turbine Systems Program  

Microsoft Academic Search

Hydropower-related research and development within the U.S. Department of Energy (DOE) is focused on enhancing the environmental performance of hydroelectric generating systems. DOE's Advanced Hydropower Turbine Systems Program was started in 1994 as a partnership with the hydropower industry, represented by the National Hydropower Association, individual utilities, and EPRI. Targeted improvements in environmental performance include greater survival of fish passing

M. J. Sale; G. F. Cada; B. N. Rinehart; G. L. Sommers; P. A. Brookshier; J. V. Flynn

2001-01-01

6

A progress report on DOE`s advanced hydropower turbine systems program  

Microsoft Academic Search

Recent hydropower research within the U.S. Department of Energy (DOE) has focused on the development of new turbine designs that can produce hydroelectricity without such adverse environmental affects as fish entrainment\\/impingement or degradation of water quality. In partnership with the hydropower industry, DOE`s advanced turbine program issued a Request for Proposals for conceptual designs in October 1994. Two contracts were

M. J. Sale; G. F. Cada; B. E. Rinehart

1997-01-01

7

A progress report on DOE`s advanced hydropower turbine systems program  

SciTech Connect

Recent hydropower research within the U.S. Department of Energy (DOE) has focused on the development of new turbine designs that can produce hydroelectricity without such adverse environmental affects as fish entrainment/impingement or degradation of water quality. In partnership with the hydropower industry, DOE`s advanced turbine program issued a Request for Proposals for conceptual designs in October 1994. Two contracts were awarded for this initial program phase, work on which will be complete this year. A technical advisory committee with representatives from industry, regulatory agencies, and natural resource agencies was also formed to guide the DOE turbine research. The lack of quantitative biological performance criteria was identified by the committee as a critical knowledge gap. To fill this need, a new literature review was completed on the mechanisms of fish mortality during turbine passage (e.g., scrape/strike, shear, press change, etc.), ways that fish behavior affects their location and orientation in turbines, and how these turbine passage stresses can be measured. Thus year, new Laboratory tests will be conducted on fish response to shear, the least-well understood mechanism of stress. Additional testing of conceptual turbine designs depends on the level of federal funding for this program.

Sale, M.J.; Cada, G.F.; Rinehart, B.E. [and others

1997-06-01

8

Fish Behavior in Relation to Passage through Hydropower Turbines: A Review  

Microsoft Academic Search

We evaluated the literature on fish behavior as it relates to passage of fish near or through hydropower turbines. Our goal was to foster compatibility of engineered systems with the normal behavior patterns of fish species and life stages such that passage into turbines and injury in passage are minimized. In particular, we focused on aspects of fish behavior that

Charles C. Coutant; Richard R. Whitney

2000-01-01

9

Fish Passage Assessment of an Advanced Hydropower Turbine and Conventional Turbine Using Blade-strike Modeling  

SciTech Connect

In the Columbia and Snake River basins, several species of Pacific salmon were listed under the Endangered Species Act of 1973 due to significant declines of fish population. Dam operators and design engineers are thus faced with the task of making those hydroelectric facilities more ecologically friendly through changes in hydro-turbine design and operation. Public Utility District No. 2 of Grant County, Washington, applied for re-licensing from the U.S. Federal Energy Regulatory Commission to replace the 10 turbines at Wanapum Dam with advanced hydropower turbines that were designed to increase power generation and improve fish passage conditions. We applied both deterministic and stochastic blade-strike models to the newly installed turbine and an existing turbine. Modeled probabilities were compared to the results of a large-scale live fish survival study and a sensor fish study under the same operational parameters. Overall, injury rates predicted by the deterministic model were higher than experimental rates of injury while those predicted by the stochastic model were in close agreement with experiment results. Fish orientation at the time of entry into the plane of the leading edges of the turbine runner blades was an important factor contributing to uncertainty in modeled results. The advanced design turbine had slightly higher modeled injury rates than the existing turbine design; however, there was no statistical evidence that suggested significant differences in blade-strike injuries between the two turbines and the hypothesis that direct fish survival rate through the advanced hydropower turbine is equal or better than that through the conventional turbine could not be rejected.

Deng, Zhiqun; Carlson, Thomas J.; Dauble, Dennis D.; Ploskey, Gene R.

2011-01-04

10

Fish behavior in relation to modeling fish passage through hydropower turbines: A review  

SciTech Connect

We evaluated the literature on fish behavior as it relates to passage of fish near or through hydropower turbines. The goal was to foster compatibility of engineered systems with the normal behavior patterns of fish species and life stages such that entrainment into turbines and injury in passage are minimized. We focused on aspects of fish behavior that could be used for computational fluid dynamics (CFD) modeling of fish trajectories through turbine systems. Downstream-migrating salmon smolts are generally surface oriented and follow flow. Smolts orient to the ceilings of turbine intakes but are horizontally distributed more evenly, except as affected by intake-specific turbulence and vortices. Smolts often enter intakes oriented head-upstream. Non-salmonids are entrained episodically, suggesting accidental capture of schools (often of juveniles or in cold water) and little behavioral control during turbine passage. Models of fish trajectories should not assume neutral buoyancy throughout the time a fish passes through a turbine, largely because of pressure effects on swim bladders. Fish use their lateral line system to sense obstacles and change their orientation, but this sensory-response system may not be effective in the rapid passage times of turbine systems. A Effects of pre-existing stress levels on fish performance in turbine passage are not well known but may be important. There are practical limits of observation and measurement of fish and flows in the proximity of turbine runners that may inhibit development of information germane to developing a more fish-friendly turbine. We provide recommendations for CFD modelers of fish passage and for additional research. 20 refs., 2 figs.

Coutant, C.C. [Oak Ridge National Lab., TN (United States); Whitney, R.R.

1997-06-01

11

Hydropower R&D: Recent Advances in Turbine Passage Technology  

SciTech Connect

The purpose of this report is to describe the recent and planned R&D activities across the U.S. related to survival of fish entrained in hydroelectric turbines. In this report, we have considered studies that are intended to develop new information that can be used to mitigate turbine-passage mortality. This review focuses on the effects on fish of physical or operational modifications to turbines, comparisons to survival in other downstream passage routes (e.g., bypass systems and spillways), and applications of new modeling, experimental, and technological approaches to develop a greater understanding of the stresses associated with turbine passage. In addition, the emphasis is on biological studies, as opposed to the engineering studies (e.g., turbine index testing) that re often carried out in support of fish passage mitigation efforts.

Rinehart, Bennie Nelson; Cada, G. F.

2000-04-01

12

Velocity field in the wake of a hydropower farm equipped with Achard turbines  

Microsoft Academic Search

The study consists of experimental and numerical investigations related to the water flow in the wake of a hydropower farm, equipped with three Achard turbines. The Achard turbine is a French concept of vertical axis cross-flow marine current turbine, with three vertical delta-blades, which operates irrespective of the water flow direction. A farm model built at 1:5 scale has been

A.-M. Georgescu; S. C. Georgescu; C. I. Cosoiu; N. Alboiu; Al Hamzu

2010-01-01

13

Fuzzy multiobjective models for optimal operation of a hydropower system  

NASA Astrophysics Data System (ADS)

Optimal operation models for a hydropower system using new fuzzy multiobjective mathematical programming models are developed and evaluated in this study. The models use (i) mixed integer nonlinear programming (MINLP) with binary variables and (ii) integrate a new turbine unit commitment formulation along with water quality constraints used for evaluation of reservoir downstream impairment. Reardon method used in solution of genetic algorithm optimization problems forms the basis for development of a new fuzzy multiobjective hydropower system optimization model with creation of Reardon type fuzzy membership functions. The models are applied to a real-life hydropower reservoir system in Brazil. Genetic Algorithms (GAs) are used to (i) solve the optimization formulations to avoid computational intractability and combinatorial problems associated with binary variables in unit commitment, (ii) efficiently address Reardon method formulations, and (iii) deal with local optimal solutions obtained from the use of traditional gradient-based solvers. Decision maker's preferences are incorporated within fuzzy mathematical programming formulations to obtain compromise operating rules for a multiobjective reservoir operation problem dominated by conflicting goals of energy production, water quality and conservation releases. Results provide insight into compromise operation rules obtained using the new Reardon fuzzy multiobjective optimization framework and confirm its applicability to a variety of multiobjective water resources problems.

Teegavarapu, Ramesh S. V.; Ferreira, André R.; Simonovic, Slobodan P.

2013-06-01

14

Agricultural-to-hydropower water transfers: sharing water and benefits in hydropower-irrigation systems  

Microsoft Academic Search

This paper presents a methodology to assess agricultural-to-hydropower water transfers in water resources systems where irrigation crop production and hydropower generation are the main economic activities. In many countries, water for crop irrigation is often considered as a static asset: irrigation water is usually allocated by a system of limited annual rights to use a prescribed volume of water. The

A. Tilmant; Q. Goor; D. Pinte

2009-01-01

15

Fish-Friendly Hydropower Turbine Development & Deployment: Alden Turbine Preliminary Engineering and Model Testing  

SciTech Connect

The Alden turbine was developed through the U.S. Department of Energy's (DOE's) former Advanced Hydro Turbine Systems Program (1994-2006) and, more recently, through the Electric Power Research Institute (EPRI) and the DOE's Wind & Water Power Program. The primary goal of the engineering study described here was to provide a commercially competitive turbine design that would yield fish passage survival rates comparable to or better than the survival rates of bypassing or spilling flow. Although the turbine design was performed for site conditions corresponding to 92 ft (28 m) net head and a discharge of 1500 cfs (42.5 cms), the design can be modified for additional sites with differing operating conditions. During the turbine development, design modifications were identified for the spiral case, distributor (stay vanes and wicket gates), runner, and draft tube to improve turbine performance while maintaining features for high fish passage survival. Computational results for pressure change rates and shear within the runner passage were similar in the original and final turbine geometries, while predicted minimum pressures were higher for the final turbine. The final turbine geometry and resulting flow environments are expected to further enhance the fish passage characteristics of the turbine. Computational results for the final design were shown to improve turbine efficiencies by over 6% at the selected operating condition when compared to the original concept. Prior to the release of the hydraulic components for model fabrication, finite element analysis calculations were conducted for the stay vanes, wicket gates, and runner to verify that structural design criteria for stress and deflections were met. A physical model of the turbine was manufactured and tested with data collected for power and efficiency, cavitation limits, runaway speed, axial and radial thrust, pressure pulsations, and wicket gate torque. All parameters were observed to fall within ranges expected for conventional radial flow machines. Based on these measurements, the expected efficiency peak for prototype application is 93.64%. These data were used in the final sizing of the supporting mechanical and balance of plant equipment. The preliminary equipment cost for the design specification is $1450/kW with a total supply schedule of 28 months. This equipment supply includes turbine, generator, unit controls, limited balance of plant equipment, field installation, and commissioning. Based on the selected head and flow design conditions, fish passage survival through the final turbine is estimated to be approximately 98% for 7.9-inch (200-mm) fish, and the predicted survival reaches 100% for fish 3.9 inches (100 mm) and less in length. Note that fish up to 7.9- inches (200 mm) in length make up more than 90% of fish entrained at hydro projects in the United States. Completion of these efforts provides a mechanical and electrical design that can be readily adapted to site-specific conditions with additional engineering development comparable to costs associated with conventional turbine designs.

None

2011-10-01

16

Velocity field in the wake of a hydropower farm equipped with Achard turbines  

NASA Astrophysics Data System (ADS)

The study consists of experimental and numerical investigations related to the water flow in the wake of a hydropower farm, equipped with three Achard turbines. The Achard turbine is a French concept of vertical axis cross-flow marine current turbine, with three vertical delta-blades, which operates irrespective of the water flow direction. A farm model built at 1:5 scale has been tested in a water channel. The Achard turbines run in stabilized current, so the flow can be assumed to be almost unchanged in horizontal planes along the vertical z-axis, thus allowing 2D numerical modelling, for different farm configurations: the computational domain is a cross-section of all turbines at a certain z-level. The two-dimensional numerical model of that farm has been used to depict the velocity field in the wake of the farm, with COMSOL Multiphysics and FLUENT software, to compute numerically the overall farm efficiency. The validation of the numerical models with experimental results is performed via the measurement of velocity distribution, by Acoustic Doppler Velocimetry, in the wake of the middle turbine within the farm. Three basic configurations were studied experimentally and numerically, namely: with all turbines aligned on a row across the upstream flow direction; with turbines in an isosceles triangular arrangement pointing downstream; with turbines in an isosceles triangular arrangement pointing upstream. As long as the numerical flow in the wake fits the experiments, the numerical results for the power coefficient (turbine efficiency) are trustworthy. The farm configuration with all turbines aligned on a same row leads to lower values of the experimental velocities than the numerical ones, while the farm configurations where the turbines are in isosceles triangular arrangement, pointing downstream or upstream, present a better match between numerical and experimental data.

Georgescu, A.-M.; Georgescu, S. C.; Cosoiu, C. I.; Alboiu, N.; Hamzu, Al

2010-08-01

17

DOE Hydropower Program biennial report 1996-1997 (with an updated annotated bibliography)  

Microsoft Academic Search

This report, the latest in a series of biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1996 and 1997. The report discusses the activities in the six areas of the hydropower program: advanced hydropower turbine systems; environmental research; hydropower research and development; renewable Indian energy

B. N. Rinehart; J. E. Francfort; G. L. Sommers; G. F. Cada; M. J. Sale

1997-01-01

18

Environmental and water-quality operational studies: improvement of hydropower-release dissolved oxygen with turbine venting. Final report  

SciTech Connect

This report summarizes various in-lake, in-structure, and downstream techniques to enhance the dissolved oxygen concentration of hydropower releases. In-lake and in-structure techniques appear to be the most applicable for Corps of Engineers projects because of the large discharges of most hydropower projects. Of these, the in-structure techniques, particularly turbine venting, appear very attractive considering cost and degree of improvement. Tests were conducted at the Clarks Hill Dam powerhouse to evaluate various aspects of turbine venting and thereby provide a data base to develop predictive and design capabilities for turbine-venting systems. Test results indicated that, at most, the oxygen deficit in the penstock could be reduced by about 30%, i.e., if the penstock oxygen deficit is 8.0 mg/(l), then, at most, about 2.4 mg/l of oxygen could be absorbed into the release flow. Two reaeration processes that contributed to the overall oxygen transfer were observed: (a) due to the turbulence in the tailrace area and (b) due to the air bubbles (vented through the turbine) as they traveled through the draft tube. A numerical computer model was developed that included the impact of the changes in thermodynamic (pressure) state as the bubbles passed through the draft tube. By developing the pressure time history, the increased potential for oxygen transfer due to the increase in hydrostatic pressure was included in model formulation. Good agreement was obtained in comparing model predictions and oxygen uptake data from previous tests at Clarks Hill.

Wilhelms, S.C.; Schneider, M.L.; Howington, S.E.

1987-03-01

19

Algorithms for Optimizing Hydropower System Operation  

NASA Astrophysics Data System (ADS)

Successive linear programming, an optimal control algorithm, and a combination of linear programming and dynamic programming (LP-DP) are employed to optimize the operation of multireservoir hydrosystems given a deterministic inflow forecast. The algorithm maximize the value of energy produced at on-peak and off-peak rates, plus the estimated value of water remaining in storage at the end of the 12-month planning period. The LP-DP algorithm is clearly dominated: it takes longer to find a solution and produces significantly less hydropower than the other two procedures. Successive linear programming (SLP) appears to find the global maximum and is easily implemented. For simple systems the optimal control algorithm finds the optimum in about one fifth the time required by SLP but is harder to implement. Computing costs for a two-reservoir, 12-month deterministic problem averaged about seven cents per run using optimal control and 37 cents using successive linear programming.

Grygier, Jan C.; Stedinger, Jery R.

1985-01-01

20

Optimal design of axial hydro turbine for micro hydropower plants  

NASA Astrophysics Data System (ADS)

In our country we have enormous low head potation flows in agricultures and aquacultures with almost fix flow rates that can be used as micro hydro power plants for producing energy. But the main problem is the high capital price per kW. Therefore there is needed to design a simple machine with a good runner for covering the various potential flows. In this paper an axial hydro turbine has designed for some low heads micro potential flow with flow rates ranged from 50 lit/sec to 150 lit/sec and heads ranged from 1 m to 5 m. The initial runner designed using classical methods and then the runner geometry has been optimized by evolutionary optimization algorithms. The final design has been simulated by a commercial flow solver in a various blade positions. The results showed a wide range characteristic curve with a wide range high efficiency.

Derakhshan, S.; Kasaeian, N.

2012-11-01

21

New technology for small hydropower installations  

Microsoft Academic Search

A general discussion is presented of new technologies, both hardware and methodologies, that may be used in developing small hydropower installations. The primary source of information is the results of the R\\/D projects funded under the DOE Small Hydropower Program. The paper is divided into the following categories: turbine\\/generator, head augmentation, nonconventional concepts, structure and construction, system management, controls, and

1984-01-01

22

Agricultural-to-hydropower water transfers: sharing water and benefits in hydropower-irrigation systems  

NASA Astrophysics Data System (ADS)

This paper presents a methodology to assess agricultural-to-hydropower water transfers in water resources systems where irrigation crop production and hydropower generation are the main economic activities. In many countries, water for crop irrigation is often considered as a static asset: irrigation water is usually allocated by a system of limited annual rights to use a prescribed volume of water. The opportunity cost (forgone benefits) of this static management approach may be important in river basins where large irrigation areas are present in the upstream reaches. Temporary reallocation of some (or all) of the irrigation water downstream to consumptive and/or non-consumptive users can increase the social benefits if the sum of the downstream productivities exceeds those of the upstream farmers whose entitlements are curtailed. However, such a dynamic allocation process will be socially acceptable if upstream farmers are compensated for increasing the availability of water downstream. This paper also presents a methodology to derive the individual contribution of downstream non-consumptive users, i.e. hydropower plants, to the financial compensation of upstream farmers. This dynamic management approach is illustrated with a cascade of multipurpose reservoirs in the Euphrates river basin. The analysis of simulation results reveals that, on average, the annual benefits obtained with the dynamic allocation process are 6% higher that those derived from a static allocation.

Tilmant, A.; Goor, Q.; Pinte, D.

2009-03-01

23

Multiple fixed hydraulic geometry turbine control system  

Microsoft Academic Search

A plurality of selected fixed hydraulic geometry turbine generators are programmed for operation at rated efficiencies by interrupting flow to the turbines under control of a programmable power controller receiving water level, flow and power monitoring inputs. The turbines selected are of discreet sizes simultaneously operative only under maximum flow conditions of the hydropower source, and otherwise operated in accordance

1984-01-01

24

Agricultural-to-hydropower water transfers: sharing water and benefits in hydropower-irrigation systems  

NASA Astrophysics Data System (ADS)

This paper presents a methodology to assess agricultural-to-hydropower water transfers in water resources systems where irrigation crop production and hydropower generation are the main economic activities. In many countries, water for crop irrigation is often considered as a static asset: irrigation water is usually allocated by a system of limited annual rights to use a prescribed volume of water, which remains to a large extent independent of the availability of water in the basin. The opportunity cost (forgone benefits) of this static management approach may be important in river basins where large irrigation areas are present in the upstream reaches. Continuously adjusting allocation decisions based on the hydrologic status of the system will lead to the temporary reallocation of some (or all) of the irrigation water downstream to consumptive and/or non-consumptive users. Such a dynamic allocation process will increase the social benefits if the sum of the downstream productivities exceeds those of the upstream farmers whose entitlements are curtailed. However, this process will be socially acceptable if upstream farmers are compensated for increasing the availability of water downstream. This paper also presents a methodology to derive the individual contribution of downstream non-consumptive users, i.e. hydropower plants, to the financial compensation of upstream farmers. This dynamic management approach is illustrated with a cascade of multipurpose reservoirs in the Euphrates river basin. The analysis of simulation results reveals that, on average, the annual benefits obtained with the dynamic allocation process are 6% higher that those derived from a static allocation.

Tilmant, A.; Goor, Q.; Pinte, D.

2009-07-01

25

Development of a more fish-tolerant turbine runner, advanced hydropower turbine project  

SciTech Connect

Alden Research Laboratory, Inc. (ARL) and Northern Research and Engineering Corporation (NREC) conducted a research program to develop a turbine runner which will minimize fish injury and mortality at hydroelectric projects. ARL?NREC have developed a runner shape which minimizes the number of blade leading edges, reduces the pressure versus time and the velocity versus distance gradients within the runner, minimizes or eliminates the clearance between the runner and runner housing, and maximizes the size of the flow passages, all with minimal penalty on turbine efficiency. An existing pump impeller provided the starting point for developing the fish tolerant turbine runner. The Hidrostal pump is a single bladed combined screw/centrifugal pump which has been proven to transport fish with minimal injury. The focus of the ARL/NREC research project was to develop a new runner geometry which is effective in downstream fish passage and hydroelectric power generation. A flow of 1,000 cfs and a head in the range of 75 ft to 100 ft were selected for conceptual design of the new runner. Conceptual design of the new runner began with a re-evaluation of studies which have been previously conducted to identify probable sources of injury to fish passing through hydraulic turbines. Criteria relative to hydraulic characteristics which are favorable for fish passage were prepared based on a reassessment of the available information. Important criteria used to develop the new runner design included low pressure change rates, minimum absolute pressures, and minimum shear. Other criteria which are reflected in the runner design are a minimum number of blades (only two), minimum total length of leading edges, and large flow passages. 86 figs., 5 tabs.

Cook, T.C.; Hecker, G.E. [Worcester Polytechnic Inst., Holden, MA (United States). Alden Research Lab.; Faulkner, H.B.; Jansen, W. [Northern Research and Engineering Corp., Woburn, MA (United States)

1997-02-01

26

Development of a more fish tolerant turbine runner advanced hydropower turbine project. Final report  

SciTech Connect

The Hidrostal pump is a single bladed combined screw/centrifugal pump which has been proven to transport fish with minimal injury. The focus of the ARL/NREC research project was to develop a new runner geometry which is effective in downstream fish passage and hydroelectric power generation. A flow of 1,000 cfs and a head in the range of 75 ft to 100 ft were selected for conceptual design of the new runner. Criteria relative to hydraulic characteristics which are favorable for fish passage were prepared based on a reassessment of the available information. Important criteria used to develop the new runner design included low pressure change rates, minimum absolute pressures, and minimum shear. Other criteria which are reflected in the runner design are a minimum number of blades (only two), minimum total length of leading edges, and large flow passages. Flow characteristics of the new runner were analyzed using two- dimensional and three-dimensional Computational Fluid Dynamic (CFD) models. The basic runner geometry was initially selected using the two-dimensional model. The three-dimensional model was used to investigate the flow characteristics in detail through the entire runner and to refine the design by eliminating potential problem areas at the leading and trailing edges. Results of the analyses indicated that the runner has characteristics which should provide safe fish passage with an overall power efficiency of approximately 90%. The size of the new runner, which is larger than conventional turbine runners with the same design flow and head, will provide engineering, fabrication, and installation.challenges related to the turbine components and the civil works. A small reduction in the overall efficiency would reduce the size of the runner considerably, would simplify the turbine manufacturing operations, and would allow installation of the new turbine at more hydroelectric sites.

Cook, T.C.; Hecker, G.E. [Worcester Polytechnic Inst., Holden, MA (United States). Alden Research Lab.; Faulkner, H.B.; Jansen, W. [Northern Research and Engineering Corp., Cambridge, MA (United States)

1997-01-01

27

Performance Problems with Group II Hydro-Cracked Turbine Oils in Corps of Engineers Hydropower Facilities.  

National Technical Information Service (NTIS)

The Corps of Engineers has historically used solvent-refined napthenic-type base oils (Group I) for lubricating hydroelectric turbines and associated governor systems. Products now being supplied by the lubrication industry for the same purpose are based ...

J. S. Micetic A. D. Beitelman

2004-01-01

28

Advanced turbine systems program  

Microsoft Academic Search

In accordance with the goals of the DOE program, improvements in the gas turbine are the primary focus of Allison activity during Phase I. To this end Allison conducted a survey of potentially applicable gas turbine cycles and selected the advanced combined cycle as reference system. Extensive analysis of two versions of the advanced combined cycle was performed against the

C. Wilkes; D. W. Mukavetz; T. K. Knickerbocker; S. A. Ali

1992-01-01

29

Turbine power plant with steam and exhaust turbine systems  

Microsoft Academic Search

This patent describes a turbine power plant having a closed loop steam turbine system and a closed loop exhaust turbine system; a closed loop steam turbine system which comprises the combination of: a steam turbine having a fluid inlet and fluid outlet mounted on a shaft; a generator means operatively connected to the shaft; a condenser having a fluid inlet

Papastavros

1988-01-01

30

Advanced turbine systems program  

SciTech Connect

In accordance with the goals of the DOE program, improvements in the gas turbine are the primary focus of Allison activity during Phase I. To this end Allison conducted a survey of potentially applicable gas turbine cycles and selected the advanced combined cycle as reference system. Extensive analysis of two versions of the advanced combined cycle was performed against the requirement for a 60% thermal efficiency (LHV) utility-sized, natural gas fired system. This analysis resulted in technology requirements for this system. Additional analysis determined emissions potential for the system, established a coal-fueled derivative system and a commercialization plan. This report deals with the technical requirements for a system that meets the thermal efficiency goal. Allison initially investigated four basic thermodynamic cycles: Humid air turbine, intercalate-recuperated systems, advanced combined cycle, chemically recuperated cycle. Our survey and cycle analysis indicated that au had the potential of reaching 60% thermal efficiency. We also concluded that engine hot section technology would be a critical technology regardless of which cycle was chosen. Based on this result Allison chose to concentrate on the advanced combined cycle. This cycle is well known and understood by the utility turbine user community and is therefore likely to be acceptable to users.

Wilkes, C.; Mukavetz, D.W.; Knickerbocker, T.K.; Ali, S.A.

1992-01-01

31

Advanced turbine systems program  

SciTech Connect

In accordance with the goals of the DOE program, improvements in the gas turbine are the primary focus of Allison activity during Phase I. To this end Allison conducted a survey of potentially applicable gas turbine cycles and selected the advanced combined cycle as reference system. Extensive analysis of two versions of the advanced combined cycle was performed against the requirement for a 60% thermal efficiency (LHV) utility-sized, natural gas fired system. This analysis resulted in technology requirements for this system. Additional analysis determined emissions potential for the system, established a coal-fueled derivative system and a commercialization plan. This report deals with the technical requirements for a system that meets the thermal efficiency goal. Allison initially investigated four basic thermodynamic cycles: Humid air turbine, intercalate-recuperated systems, advanced combined cycle, chemically recuperated cycle. Our survey and cycle analysis indicated that au had the potential of reaching 60% thermal efficiency. We also concluded that engine hot section technology would be a critical technology regardless of which cycle was chosen. Based on this result Allison chose to concentrate on the advanced combined cycle. This cycle is well known and understood by the utility turbine user community and is therefore likely to be acceptable to users.

Wilkes, C.; Mukavetz, D.W.; Knickerbocker, T.K.; Ali, S.A.

1992-12-31

32

Wind turbine system  

SciTech Connect

A wind turbine system utilizes a bicycle wheel type turbine having airfoils mounted on various spoke pairs. The vertical yaw axis lies in the horizontal projection of the airfoils to offer better control of the system; for example, automatic stowage in the case of excessive wind is provided since the superstructure of the turbine provides a torque around the vertical yaw axis which moves the wheel into a stowed position. At the same time, the wheel diameter can be made larger and thus heavier since the drive connection to the generator also helps support the weight of the wheel, since it is a rim drive. Greater electrical generation is also provided since an air scoop facing into the wind allows the effective generator capacity to be increased with air velocity. Lastly, the radial rate of change of the angle of the airfoils can be closely controlled.

Smith, O.J.

1982-05-18

33

DOE Hydropower Program Annual Report for FY 2002  

SciTech Connect

The U.S. Department of Energy (DOE) conducts research on advanced hydropower technology through its hydropower program, which is organized under the Office of Wind and Hydropower Technologies within the Office of Energy Efficiency and Renewable Energy. This annual report describes the various projects supported by the hydropower program in FY 2002. The program=s current focus is on improving the environmental performance of hydropower projects by addressing problems such as fish mortality during passage through turbines, alteration of instream habitat, and water quality in tailwaters. A primary goal of this research is to develop new, environmentally friendly technology. DOE-funded projects have produced new conceptual designs for turbine systems, and these are now being tested in pilot-scale laboratory tests and in the field. New design approaches range from totally new turbine runners to modifications of existing designs. Biological design criteria for these new turbines have also been developed in controlled laboratory tests of fish response to physical stresses, such as hydraulic shear and pressure changes. These biocriteria are being combined with computational tools to locate and eliminate areas inside turbine systems that are damaging to fish. Through the combination of laboratory, field, and computational studies, new solutions are being found to environmental problems at hydropower projects. The diverse program activities continue to make unique contributions to clean energy production in the U.S. By working toward technology improvements that can reduce environmental problems, the program is helping to reposition hydropower as an acceptable, renewable, domestic energy choice.

Garold L. Sommers; R. T. Hunt

2003-07-01

34

Hoover PMSC system [hydropower plant automation  

Microsoft Academic Search

The US Bureau of Reclamation has undertaken a major effort and risk in developing an open architecture and modular control system based on multiple vendors for use in its hydroelectric power facilities. The first system of this concept is operational at Hoover Dam controlling more than 4 billion kilowatt-hours of power and 7.5 million acre-feet of water yearly. The programmable

1999-01-01

35

Environmental & Water Quality Operational Studies: Improvement of Hydropower Release Dissolved Oxygen with Turbine Venting.  

National Technical Information Service (NTIS)

This report summarizes various in-lake, in-structure, and downstream techniques to enhance the dissolved oxygen concentration of hydropower releases. In-lake and in-structure techniques appear to be the most applicable for Corps of Engineers projects beca...

S. C. Wilhelms M. L. Schneider S. E. Howington

1987-01-01

36

Gas turbine cooling system  

DOEpatents

A gas turbine engine (10) having a closed-loop cooling circuit (39) for transferring heat from the hot turbine section (16) to the compressed air (24) produced by the compressor section (12). The closed-loop cooling system (39) includes a heat exchanger (40) disposed in the flow path of the compressed air (24) between the outlet of the compressor section (12) and the inlet of the combustor (14). A cooling fluid (50) may be driven by a pump (52) located outside of the engine casing (53) or a pump (54) mounted on the rotor shaft (17). The cooling circuit (39) may include an orifice (60) for causing the cooling fluid (50) to change from a liquid state to a gaseous state, thereby increasing the heat transfer capacity of the cooling circuit (39).

Bancalari, Eduardo E. (Orlando, FL)

2001-01-01

37

EMTA’s Evaluation of the Elastic Properties for Fiber Polymer Composites Potentially Used in Hydropower Systems  

SciTech Connect

Fiber-reinforced polymer composites can offer important advantages over metals where lightweight, cost-effective manufacturing and high mechanical performance can be achieved. To date, these materials have not been used in hydropower systems. In view of the possibility to tailor their mechanical properties to specific applications, they now have become a subject of research for potential use in hydropower systems. The first step in any structural design that uses composite materials consists of evaluating the basic composite mechanical properties as a function of the as-formed composite microstructure. These basic properties are the elastic stiffness, stress-strain response, and strength. This report describes the evaluation of the elastic stiffness for a series of common discontinuous fiber polymer composites processed by injection molding and compression molding in order to preliminarily estimate whether these composites could be used in hydropower systems for load-carrying components such as turbine blades. To this end, the EMTA (Copyright © Battelle 2010) predictive modeling tool developed at the Pacific Northwest National Laboratory (PNNL) has been applied to predict the elastic properties of these composites as a function of three key microstructural parameters: fiber volume fraction, fiber orientation distribution, and fiber length distribution. These parameters strongly control the composite mechanical performance and can be tailored to achieve property enhancement. EMTA uses the standard and enhanced Mori-Tanaka type models combined with the Eshelby equivalent inclusion method to predict the thermoelastic properties of the composite based on its microstructure.

Nguyen, Ba Nghiep; Paquette, Joshua

2010-08-01

38

Pilot Scale Tests Alden\\/Concepts NREC Turbine  

Microsoft Academic Search

Alden Research Laboratory, Inc. has completed pilot scale testing of the new Alden\\/Concepts NREC turbine that was designed to minimize fish injury at hydropower projects. The test program was part of the U.S. Department of Energy's Advanced Hydropower Turbine Systems Program. The prototype turbine operating point was 1,000 cfs at 80ft head and 100 rpm. The turbine was design to:

Thomas C. Cook; George E. Hecker; Stephen Amaral; Philip Stacy; Fangbiao Lin; Edward Taft

2003-01-01

39

Sizing and Quantity Estimation for Desilting Tank of Small Hydropower Projects – an Analytical Approach  

Microsoft Academic Search

In small hydropower projects, desilting tank is an important component which protect the mechanical equipment specially turbine from the silt carried by the water conductor system. Desilting tanks are used in water treatment plants and hydropower channels to remove objectionable sediment of a specified size and quantity. Design of desilting tank requires evaluation of sediment removal efficiency over the range

Sachin Mishra; S. K. Singal; D. K. Khatod

2012-01-01

40

Inexpensive cross-flow hydropower turbine at Arbuckle Mountain Hydroelectric Project: Final construction and cost report  

SciTech Connect

The Arbuckle Mountain Hydroelectric Project is a Cooperative Agreement between the US Department of Energy (DOE) and Ron and Carlene Ott. The project's purpose is to build and intensively test an inexpensive American-made cross-flow turbine and to provide information to DOE on the cost, efficiency, operation and maintenance of the unit. This final report discusses the technical and financial aspects of planning, designing, manufacturing, and installing the turbine as well as design and construction details of the site.

Not Available

1988-07-01

41

Hydropower Stations. Generating Equipment and Its Installation.  

National Technical Information Service (NTIS)

The first part of the book describes hydropower sets. Fundamental concepts concerning the use of hydraulic energy are explained, as are the general theory of hydraulic turbines, their layout and design, the design of hydropower generators, governors, and ...

A. N. Goncharov

1975-01-01

42

Inexpensive cross-flow hydropower turbine at the Arbuckle Mountain Hydroelectric Project  

SciTech Connect

The Arbuckle Mountain Hydroelectric Project represents a Cooperative Agreement between the US Department of Energy (DOE) and Ron and Carlene Ott. The purpose of the project was to build, install in a hydro project, and intensively test an inexpensive American-made cross-flow turbine and to provide information to the DOE on the costs, efficiency, operation, and maintenance of the unit. The data gained from the research and development project will assist in development of cost-effective technology for low-head small hydro sites. The turbine was designed to reduce the cost of manufacturing while making maximum use of the power available in a remote flashy northern California stream. Even with extensive field modifications, the cost of the unit was much less than those quoted by foreign manufacturers for the same site. The new type of cross-flow turbine developed uses an innovative automatic flow control sliding device which allows the unit to produce power at flow ranges of less than 6% of design flow. This coupled with the infinite flow adjustment feature allows detailed flow regulation needed for small run-of-river projects. The field efficiency testing, the subject of this report, was conducted by Ott Engineering, Inc. in 1988 and early 1989. The tests showed the turbine to have efficiencies in the high seventies and with improvements could reach the efficiencies touted by the European manufacturers of 85% and still be relatively inexpensive to manufacture. It was also found during the tests that the vacuum and depth of water on the runner had a pronounced effect on the turbine output and it is recommended that future research be conducted on these effects, especially for high-vacuum cross-flow turbines. 3 refs.

Not Available

1989-11-01

43

Turbine nozzle attachment system  

DOEpatents

A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The nozzle guide vane assembly includes a pair of legs extending radially outwardly from an outer shroud and a pair of mounting legs extending radially inwardly from an inner shroud. Each of the pair of legs and mounting legs have a pair of holes therein. A plurality of members attached to the gas turbine engine have a plurality of bores therein which axially align with corresponding ones of the pair of holes in the legs. A plurality of pins are positioned within the corresponding holes and bores radially positioning the nozzle guide vane assembly about a central axis of the gas turbine engine.

Norton, Paul F. (San Diego, CA); Shaffer, James E. (Maitland, FL)

1995-01-01

44

ADVANCED TURBINE SYSTEMS PROGRAM  

SciTech Connect

The market for power generation equipment is undergoing a tremendous transformation. The traditional electric utility industry is restructuring, promising new opportunities and challenges for all facilities to meet their demands for electric and thermal energy. Now more than ever, facilities have a host of options to choose from, including new distributed generation (DG) technologies that are entering the market as well as existing DG options that are improving in cost and performance. The market is beginning to recognize that some of these users have needs beyond traditional grid-based power. Together, these changes are motivating commercial and industrial facilities to re-evaluate their current mix of energy services. One of the emerging generating options is a new breed of advanced fuel cells. While there are a variety of fuel cell technologies being developed, the solid oxide fuel cells (SOFC) and molten carbonate fuel cells (MCFC) are especially promising, with their electric efficiency expected around 50-60 percent and their ability to generate either hot water or high quality steam. In addition, they both have the attractive characteristics of all fuel cells--relatively small siting footprint, rapid response to changing loads, very low emissions, quiet operation, and an inherently modular design lending itself to capacity expansion at predictable unit cost with reasonably short lead times. The objectives of this project are to:(1) Estimate the market potential for high efficiency fuel cell hybrids in the U.S.;(2) Segment market size by commercial, industrial, and other key markets;(3) Identify and evaluate potential early adopters; and(4) Develop results that will help prioritize and target future R&D investments. The study focuses on high efficiency MCFC- and SOFC-based hybrids and competing systems such as gas turbines, reciprocating engines, fuel cells and traditional grid service. Specific regions in the country have been identified where these technologies and the corresponding early adopters are likely to be located.

Sy Ali

2002-03-01

45

Combustion heated air turbine starter system  

Microsoft Academic Search

This paper describes a combustion heated air turbine starter system. It comprises: an air turbine starter operatively associated with a main turbine engine; an auxiliary power unit adapted to deliver air through a bleed duct to the air turbine starter; and means for combusting fuel from a source with air from the auxiliary power unit; the combusting means including an

Shekleton

1991-01-01

46

Inexpensive cross-flow hydropower turbine at Arbuckle Mountain Hydroelectric Project  

SciTech Connect

This report documents the first three and half years of operation and maintenance on the Arbuckle Mountain Hydroelectric Project. Located on a flashy mountain stream in northern California, the project was designed, built and tested through a Cooperative Agreement between the US DOE and OTT Engineering, Inc. (OTT). The purpose of the Agreement is to build and intensively test an inexpensive American-made cross-flow turbine and to provide information to the DOE on the cost, efficiency, operation, and maintenance of the unit. It requires that OTT document for DOE a summary of the complete operating statistics, operation and maintenance cost, and revenues from power sales for a two-year operating period. Several unique events occurred between the initial start-up (December 1986) and the beginning of the 1989 generation season (October 1988) that delayed the first year's full operation and provided unique information for a demonstration project of this type. Accordingly, this report will discuss certain major problems experienced with the design, operation and maintenance, and energy production, as well as the operation and maintenance costs and value of the power produced for the first three and half years of operation. 9 figs., 2 tabs.

Not Available

1991-07-01

47

Climate informed long term seasonal forecasts of hydroenergy inflow for the Brazilian hydropower system  

Microsoft Academic Search

summary Efficient management of water and energy is an important goal of sustainable development for any nation. Streamflow forecasts, have been used in complex optimization models to maximize water use efficiency and electrical energy production. In this paper we develop a statistical model for the long term forecasts of hydroenergy inflow into the Brazilian hydropower system, which consists of more

Carlos H. R. Lima; Upmanu Lall

2010-01-01

48

ADVANCED GAS TURBINE SYSTEMS RESEARCH  

SciTech Connect

The activities of the Advanced Gas Turbine Systems Research (AGRSR) program are described in the quarterly report. The report is divided into discussions of Membership, Administration, Technology Transfer (Workshop/Education) and Research. Items worthy of note are presented in extended bullet format following the appropriate heading.

Unknown

2000-01-01

49

Advanced Turbine Systems program  

SciTech Connect

Allison draws the following preliminary conclusions from this preliminary design effort: (1) All cycles investigated require a high temperature turbine capability to be developed under ATS. (2) The HAT and intercooled chemical recuperation cycles compete in only a narrow sector of the industrial engine market. This is the result of the complexity and water usage of the HAT cycle and the limitation of the chemical recuperation cycle to applications where natural gas is readily available. (3) From a cycle point of view, the ICR and chemical recuperation cycles are similar. Both optimize at fairly low compressor pressure ratios ({approximately}15) because both want high temperature in the exhaust to optimize the recuperation process. Excess steam production with the chemical recuperation process makes it somewhat doubtful that the two recuperation processes are interchangeable from a hardware point of view. Allison intends to perform a global optimization on this cycle during Phase 2 of ATS. (4). There appears to be no substitute for the simple cycle with steam generation in the cogen-steam market since steam is, by definition, a valuable product of the cycle.

Wilkes, C.; Mukavetz, D.W.; Knickerbocker, T.K.; Ali, S.A.

1993-11-01

50

Chapter 14: Wind Turbine Control Systems  

SciTech Connect

Wind turbines are complex, nonlinear, dynamic systems forced by gravity, stochastic wind disturbances, and gravitational, centrifugal, and gyroscopic loads. The aerodynamic behavior of wind turbines is nonlinear, unsteady, and complex. Turbine rotors are subjected to a complicated three-dimensional turbulent wind inflow field that drives fatigue loading. Wind turbine modeling is also complex and challenging. Accurate models must contain many degrees of freedom (DOF) to capture the most important dynamic effects. The rotation of the rotor adds complexity to the dynamics modeling. Designs of control algorithms for wind turbines must account for these complexities. Algorithms must capture the most important turbine dynamics without being too complex and unwieldy. Off-the-shelf commercial soft ware is seldom adequate for wind turbine dynamics modeling. Instead, specialized dynamic simulation codes are usually required to model all the important nonlinear effects. As illustrated in Figure 14-1, a wind turbine control system consists of sensors, actuators and a system that ties these elements together. A hardware or software system processes input signals from the sensors and generates output signals for actuators. The main goal of the controller is to modify the operating states of the turbine to maintain safe turbine operation, maximize power, mitigate damaging fatigue loads, and detect fault conditions. A supervisory control system starts and stops the machine, yaws the turbine when there is a significant yaw misalignment, detects fault conditions, and performs emergency shut-downs. Other parts of the controller are intended to maximize power and reduce loads during normal turbine operation.

Wright, A. D.

2009-01-01

51

Renewable Energy: Hydropower  

NSDL National Science Digital Library

This lesson introduces students to the use of flowing or falling water (hydropower) to perform work, particularly electric power generation. Topics include the history of hydropower development, the invention of turbines and electric generators, and the history of hydroelectric power development in the United States. There is also discussion of the environmental issues associated with the construction of large dams and flooding large tracts of land, as well as some of the physics involved in the transfer of energy from moving water to a mechanical device such as a turbine. The lesson includes an activity in which students use a model turbine and generator and vary the height from which water flows into them to examine how energy output and efficiency varies.

Pratte, John

2008-12-29

52

Assessing Stochastic Optimization for Rio Tinto Alcan's Hydropower System in Eastern Canada  

NASA Astrophysics Data System (ADS)

Rio Tinto Alcan (RTA) is a multinational aluminium producer with smelters in Quebec, Canada. RTA also owns and operates power houses on Péribonka and Saguenay Rivers. The system, which is run by RTA's Quebec Power Operations Division, consists of 6 generating stations and 3 major reservoirs, for an installed capacity of 2900 MW. One of the significant issues that had to be resolved for effective operation of this system was to determine the volume of water release per week for all generating stations. Several challenges had to be dealt with before a suitable solution could be found. Last year, RTA started a five year R&D project for improving the management of the hydropower system. This project includes data monitoring, Hydrological Ensemble Prediction (HEP) and stochastic optimization (SO) methods. Development of SO methods is particularly interesting for RTA since, until now, the decision making process has been based on a deterministic solver even if it is impossible to predict naturally contributed volumes with any accuracy beyond a few days. Moreover, the production at the generating stations follows a non-linear, non-convex function of turbine flow rates and water head. Both of these factors have the effect of requiring that the decision should be based upon solving a non-linear and non-convex stochastic optimization problem. The following presentation describes the first part of the SO project and aims to assess the value of using a stochastic solver instead of a deterministic solver. Two different SO approaches were evaluated: lag-1 Stochastic Dynamic Programming (SDP) and Sampling Stochastic Dynamic Programming (SSDP) algorithms. HEP are used to capture the spatio-temporal variability of the inflows. Scenarios are generated using a hydrological model (HM) by initialising the HM with the same initial conditions (hydrologic state variables). These hydrologic variables are estimated using real-time observations available for the catchment area. Inter-scenario variability is provided by using different sequences of meteorological observations entered into the HM. The scenarios are used to estimate the parameters of the auto-regressive model utilized by SDP and the hydrologic state variables are used to estimate the probability transition between scenarios required by the SSDP algorithm. The optimization methods were implemented in RTA's system and the results compared with the actual deterministic decision procedure. Methods were compared using a test bench into which were incorporated the characteristics of the facilities and the HEP database.

Cote, P.; Latraverse, M.; Leconte, R.; Larouche, B.

2012-04-01

53

Magnus air turbine system  

Microsoft Academic Search

A Magnus effect windmill for generating electrical power is disclosed. A large nacelle-hub mounted pivotally (in Azimuth) atop a support tower carries, in the example disclosed, three elongated barrels arranged in a vertical plane and extending symmetrically radially outwardly from the nacelle. The system provides spin energy to the barrels by internal mechanical coupling in the proper sense to cause,

Thomas F

1982-01-01

54

DOE Hydropower Program biennial report 1996-1997 (with an updated annotated bibliography)  

SciTech Connect

This report, the latest in a series of biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1996 and 1997. The report discusses the activities in the six areas of the hydropower program: advanced hydropower turbine systems; environmental research; hydropower research and development; renewable Indian energy resources; resource assessment; and technology transfer. The report also includes an annotated bibliography of reports pertinent to hydropower, written by the staff of the Idaho National Engineering and Environmental Laboratory, Oak Ridge National Laboratory, Federal and state agencies, cities, metropolitan water districts, irrigation companies, and public and independent utilities. Most reports are available from the National Technical Information Service.

Rinehart, B.N.; Francfort, J.E.; Sommers, G.L. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); Cada, G.F.; Sale, M.J. [Oak Ridge National Lab., TN (United States)

1997-06-01

55

Hydro-power development in remote locations of developing countries  

NASA Astrophysics Data System (ADS)

In many developing countries hydropower can be used to replace the consumption of imported oil. The economic advantage of using hydropower increases if a low cost, locally manufactured turbine, called the cross flow turbine, can be used. This paper discusses the technical design and use of the cross flow turbine in the context of a hydroelectric development project in Africa.

Smith, Granville J.

1985-11-01

56

14 CFR 23.1111 - Turbine engine bleed air system.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 2013-01-01 false Turbine engine bleed air system. 23.1111 Section...Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2013-01-01

57

Gas fired Advanced Turbine System  

SciTech Connect

The primary objective of the first phase of the Advanced Gas Turbine System (ATS) program was the concept definition of an advanced engine system that meets efficiency and emission goals far exceeding those that can be provided with today`s equipment. The thermal efficiency goal for such an advanced industrial engine was set at 50% some 15 percentage points higher than current equipment levels. Exhaust emissions goals for oxides of nitrogen (NO{sub x}), carbon monoxide (CO), and unburned hydrocarbons (UH) were fixed at 8 parts per million by volume (ppmv), 20 ppmv, and 20 ppmv respectively, corrected to 15% oxygen (O{sub 2}) levels. Other goals had to be addressed; these involved reducing the cost of power produced by 10 percent and improving or maintaining the reliability, availability, and maintainability (RAM) at current levels. This advanced gas turbine was to be fueled with natural gas, and it had to embody features that would allow it bum coal or coal derived fuels.

LeCren, R.T.; White, D.J.

1993-01-01

58

Wind turbine control system modeling capabilities  

SciTech Connect

At the National Renewable Energy Laboratory`s (NREL`s) National Wind Technology Center the authors are continuing to make progress in their ability to model complete wind turbine systems. An ADAMS{reg_sign} model of the NREL variable speed test bed turbine was developed to determine whether wind turbine control systems could be simulated and to investigate other control strategies for this turbine. Model simulations are compared with data from the operating turbine using the current mode of operation. In general, the simulations show good agreement with test data. Having established confidence in their ability to model the physical machine, the authors evaluated two other control methods. The methods studied are a generalized predictive control method and a bias estimation method. Simulation results using these methods are compared to simulation results of the current mode of operation of the turbine.

Pierce, K.; Fingersh, L.J.

1998-04-01

59

NEXT GENERATION TURBINE SYSTEM STUDY  

SciTech Connect

Rolls-Royce has completed a preliminary design and marketing study under a Department of Energy (DOE) cost shared contract (DE-AC26-00NT40852) to analyze the feasibility of developing a clean, high efficiency, and flexible Next Generation Turbine (NGT) system to meet the power generation market needs of the year 2007 and beyond. Rolls-Royce evaluated the full range of its most advanced commercial aerospace and aeroderivative engines alongside the special technologies necessary to achieve the aggressive efficiency, performance, emissions, economic, and flexibility targets desired by the DOE. Heavy emphasis was placed on evaluating the technical risks and the economic viability of various concept and technology options available. This was necessary to ensure the resulting advanced NGT system would provide extensive public benefits and significant customer benefits without introducing unacceptable levels of technical and operational risk that would impair the market acceptance of the resulting product. Two advanced cycle configurations were identified as offering significant advantages over current combined cycle products available in the market. In addition, balance of plant (BOP) technologies, as well as capabilities to improve the reliability, availability, and maintainability (RAM) of industrial gas turbine engines, have been identified. A customer focused survey and economic analysis of a proposed Rolls-Royce NGT product configuration was also accomplished as a part of this research study. The proposed Rolls-Royce NGT solution could offer customers clean, flexible power generation systems with very high efficiencies, similar to combined cycle plants, but at a much lower specific cost, similar to those of simple cycle plants.

Frank Macri

2002-02-28

60

Seasonal-Scale Optimization of Conventional Hydropower Operations in the Upper Colorado System  

NASA Astrophysics Data System (ADS)

Sandia National Laboratories is developing the Hydropower Seasonal Concurrent Optimization for Power and the Environment (Hydro-SCOPE) tool to examine basin-wide conventional hydropower operations at seasonal time scales. This tool is part of an integrated, multi-laboratory project designed to explore different aspects of optimizing conventional hydropower operations. The Hydro-SCOPE tool couples a one-dimensional reservoir model with a river routing model to simulate hydrology and water quality. An optimization engine wraps around this model framework to solve for long-term operational strategies that best meet the specific objectives of the hydrologic system while honoring operational and environmental constraints. The optimization routines are provided by Sandia's open source DAKOTA (Design Analysis Kit for Optimization and Terascale Applications) software. Hydro-SCOPE allows for multi-objective optimization, which can be used to gain insight into the trade-offs that must be made between objectives. The Hydro-SCOPE tool is being applied to the Upper Colorado Basin hydrologic system. This system contains six reservoirs, each with its own set of objectives (such as maximizing revenue, optimizing environmental indicators, meeting water use needs, or other objectives) and constraints. This leads to a large optimization problem with strong connectedness between objectives. The systems-level approach used by the Hydro-SCOPE tool allows simultaneous analysis of these objectives, as well as understanding of potential trade-offs related to different objectives and operating strategies. The seasonal-scale tool will be tightly integrated with the other components of this project, which examine day-ahead and real-time planning, environmental performance, hydrologic forecasting, and plant efficiency.

Bier, A.; Villa, D.; Sun, A.; Lowry, T. S.; Barco, J.

2011-12-01

61

Wind turbine blade pitch control system  

Microsoft Academic Search

A pitch control system for a multibladed variable pitch wind turbine is described. Each of the turbine blades is pivotally driven about the longitudinal axis thereof independently of the other blades by at least a pair of hydraulic actuators. The actuators are supplied with pressurized hydraulic fluid from a first source thereof under conditions of normal pitch change adjustment. Under

P. E. Barnes; M. G. Mayo; R. Sherman

1982-01-01

62

Historical Perspective on the U.S. Department of Energy's Hydropower Program  

SciTech Connect

For 30 years, the U.S. Department of Energy supported unique research and development activities focused on improving the domestic hydropower industry. In the 1970s and early 1980s, DOE’s Hydropower Program focused on technology assessment and a Small Hydropower Demonstration Program. After a period of zero funding in the late 1980s, the Program restarted with the goal of developing new technology that would improve the environmental performance of hydropower projects. A unique partnership of industry and federal cost-sharing allowed the Advanced Hydropower Turbine Systems activity to be established in 1994 – this led to new fish-friendly turbine designs and testing. Interagency cooperation with organizations like the U.S. Army Corps of Engineers has been a consistent part of the Program, along with scientific leadership and technical expertise from three of DOE’s National Laboratories: INL, ORNL, and PNNL. Program accomplishments include several new turbine designs, biological design criteria, computational and physical modeling, and environmental sensors. In contrast to other R&D on fish passage at dams, the DOE-sponsored research has focused on making the path through the turbine safer.

Sale, Michael J.; Cada, G. F.; Dauble, Dennis D.

2006-08-01

63

Development of advanced gas turbine systems.  

National Technical Information Service (NTIS)

The objective of the Advanced Turbine Systems study is to investigate innovative natural gas fired cycle developments to determine the feasibility of achieving 60% efficiency within a 8-year time frame. The potential system was to be environmentally super...

R. L. Bannister D. A. Little B. C. Wiant

1993-01-01

64

Specific features of geothermal steam turbine control and emergency system  

Microsoft Academic Search

There are significant construction as well as operational differences between geothermal and conventional steam turbines. These result in specific features associated with geothermal steam turbine control and emergency system. Several aspects of geothermal steam turbine control have been considered. Some proposals of geothermal steam turbine control have been presented. Among others the following operation modes have been considered: Driving turbine,

Z. Domachowski; A. Gutierrez

1986-01-01

65

Combustion modeling in advanced gas turbine systems  

SciTech Connect

Goal of DOE`s Advanced Turbine Systems program is to develop and commercialize ultra-high efficiency, environmentally superior, cost competitive gas turbine systems for base-load applications in utility, independent power producer, and industrial markets. Primary objective of the program here is to develop a comprehensive combustion model for advanced gas turbine combustion systems using natural gas (coal gasification or biomass fuels). The efforts included code evaluation (PCGC-3), coherent anti-Stokes Raman spectroscopy, laser Doppler anemometry, and laser-induced fluorescence.

Smoot, L.D.; Hedman, P.O.; Fletcher, T.H.; Brewster, B.S.; Kramer, S.K. [Brigham Young Univ., Provo, UT (United States). Advanced Combustion Engineering Research Center

1995-12-31

66

Mode changing stability of wind turbine in an integrated wind turbine and rechargeable battery system  

Microsoft Academic Search

Power generated by wind turbines changes due to variation in wind speed that is independent of the load power. Rechargeable batteries could be used as a reserve power source to alleviate unbalance between the load power and power generated by wind turbines. A supervisory controller is proposed for an integrated wind turbine-battery system (wind turbine electrically connected to a rechargeable

Christine A. Mecklenborg; Dushyant Palejiya; John F. Hall; Dongmei Chen

2011-01-01

67

Advanced Turbine Systems Program and coal applications  

Microsoft Academic Search

The US Department of Energy (DOE) is conducting a program to develop ultra high-efficiency, cost-effective, environmentally benign gas turbine systems for industrial and utility applications. The Advanced Turbine Systems (ATS) Program, jointly managed by the DOE`s Office of Fossil Energy (DOE\\/FE) and Office of Conservation and Renewable Energy (DOE\\/CE), will lead to the commercial offering by industry of systems meeting

H. A. Jr. Webb; R. A. Bajura; E. L. Jr. Parsons

1993-01-01

68

Advanced Turbine Systems Program and coal applications  

Microsoft Academic Search

The US Department of Energy (DOE) is conducting a program to develop ultra high-efficiency, cost-effective, environmentally benign gas turbine systems for industrial and utility applications. The Advanced Turbine Systems (ATS) Program, jointly managed by the DOE's Office of Fossil Energy (DOE\\/FE) and Office of Conservation and Renewable Energy (DOE\\/CE), will lead to the commercial offering by industry of systems meeting

H. A. Jr. Webb; R. A. Bajura; E. L. Jr. Parsons

1993-01-01

69

NEXT GENERATION GAS TURBINE SYSTEMS STUDY  

SciTech Connect

Under sponsorship of the U.S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse Power Corporation has conducted a study of Next Generation Gas Turbine Systems that embraces the goals of the DOE's High Efficiency Engines and Turbines and Vision 21 programs. The Siemens Westinghouse Next Generation Gas Turbine (NGGT) Systems program was a 24-month study looking at the feasibility of a NGGT for the emerging deregulated distributed generation market. Initial efforts focused on a modular gas turbine using an innovative blend of proven technologies from the Siemens Westinghouse W501 series of gas turbines and new enabling technologies to serve a wide variety of applications. The flexibility to serve both 50-Hz and 60-Hz applications, use a wide range of fuels and be configured for peaking, intermediate and base load duty cycles was the ultimate goal. As the study progressed the emphasis shifted from a flexible gas turbine system of a specific size to a broader gas turbine technology focus. This shift in direction allowed for greater placement of technology among both the existing fleet and new engine designs, regardless of size, and will ultimately provide for greater public benefit. This report describes the study efforts and provides the resultant conclusions and recommendations for future technology development in collaboration with the DOE.

Benjamin C. Wiant; Ihor S. Diakunchak; Dennis A. Horazak; Harry T. Morehead

2003-03-01

70

Assessing The Value of Hydrological Ensemble Predictions for Rio Tinto Alcan's Hydropower System in Eastern Canada  

NASA Astrophysics Data System (ADS)

Rio Tinto Alcan (RTA) is a multinational aluminium producer with smelters in Quebec, Canada. RTA also owns and operates power houses on Péribonka and Saguenay Rivers. The system, which is run by RTA's Quebec Power Operations Division, consists of 6 generating stations and 3 major reservoirs, for an installed capacity of 2900 MW. One of the significant issues that had to be resolved for effective operation of this system was to determine the volume of water release per week for all generating stations. Several challenges had to be dealt with before a suitable solution could be found. Last year, RTA started a five year R&D project for improving the management of the hydropower system. This project includes data monitoring, hydrological ensemble prediction (HEP) and stochastic optimization methods. A concomitant presentation (submitted to HS5.7 by Cote et al.) describes the stochastic optimization project that aims to assess the value of using a stochastic solver instead of a deterministic one. Cote et al. evaluated two different stochastic optimization approaches: lag-1 Stochastic Dynamic Programming (SDP) and Sampling Stochastic Dynamic Programming (SSDP) algorithms. Both stochastic optimization methods use Hydrological Ensemble Prediction (HEP) to capture the spatio-temporal variability of the inflows. This presentation investigates the value of using different HEP procedures in the operation of RTA's hydropower system with stochastic optimization methods. More precisely, the value of using biased or unbiased HEP, the value of using HEP with a good representation or a misrepresentation of the predictive uncertainties were assessed using a test bench study that mimics real-world RTA's operations. The results indicate that in real world operations, biased HEP or under-dispersed HEP can void the gain obtained by stochastic optimization methods.

Latraverse1, M.; Cote, P.; Larouche1, B.

2012-04-01

71

Steam turbine flow direction control system  

SciTech Connect

This patent describes, in a reheat steam turbine having at least one turbine element with an impulse chamber and an exhaust stage, the steam turbine having other elements and zones wherein the pressure is lower than that of the exhaust stage, a system for reducing windage heating and resulting distress to turbine blading by prevention of Coanda-type flow. It comprises: outlet means located upstream of the exhaust stage for extraction of steam therethrough; first duct means connecting the outlet means to a relatively low pressure zone; first valve means connected to the duct means for controlling steam flow through the outlet means; inlet means into the impulse chamber for introduction of exhaust steam from the exhaust stage; second duct means connected between the inlet means and the exhaust stage; and second valve means connected to the second duct means for controlling the flow to exhaust steam into the impulse chamber.

Silvestri, G.J. Jr.

1990-09-18

72

Wind Turbine Generator System Safety and Function Test Report for the Ventera VT10 Wind Turbine.  

National Technical Information Service (NTIS)

This report summarizes the results of a safety and function test that NREL conducted on the Ventera VT10 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System...

A. Huskey D. Jager J. Hur J. Smith

2012-01-01

73

Short-term Hydropower Reservoir Operations in Chile's Central Interconnected System: Tradeoffs between Hydrologic Alteration and Economic Performance  

NASA Astrophysics Data System (ADS)

Hydropower accounts for about 50% of the installed capacity in Chile's Central Interconnected System (CIS) and new developments are envisioned in the near future. Large projects involving reservoirs are perceived negatively by the general public. In terms of operations, hydropower scheduling takes place at monthly, weekly, daily and hourly intervals, and operations at each level affect different environmental processes. Due to its ability to quickly and inexpensively respond to short-term changes in demand, hydropower reservoirs often are operated to provide power during periods of peak demand. This operational scheme, known as hydropeaking, changes the hydrologic regime by altering the rate and frequency of changes in flow magnitude on short time scales. To mitigate impacts on downstream ecosystems, operational constraints -typically minimum instream flows and maximum ramping rates- are imposed on hydropower plants. These operational restrictions limit reduce operational flexibility and can reduce the economic value of energy generation by imposing additional costs on the operation of interconnected power systems. Methods to predict the degree of hydrologic alteration rely on statistical analyses of instream flow time series. Typically, studies on hydrologic alteration use historical operational records for comparison between pre- and post-dam conditions. Efforts to assess hydrologic alteration based on future operational schemes of reservoirs are scarce. This study couples two existing models: a mid-term operations planning and a short-term economic dispatch to simulate short-term hydropower reservoir operations under different future scenarios. Scenarios of possible future configurations of the Chilean CIS are defined with emphasis on the introduction of non-conventional renewables (particularly wind energy) and large hydropower projects in Patagonia. Both models try to reproduce the actual decision making process in the Chilean Central Interconnected System (CIS). Chile's CIS is structured as a mandatory pool with audited costs and therefore the economic dispatch can be formulated as a cost minimization problem. Consequently, hydropower reservoir operations are controlled by the ISO. Reservoirs with the most potential to cause short-term hydrologic alteration were identified from existing operational records. These records have also been used to validate our simulated operations. Results in terms of daily and subdaily hydrologic alteration as well as the economic performance of the CIS are presented for alternative energy matrix scenarios. Tradeoff curves representing the compromise between indicators of hydrologic alteration and economic indicators of the CIS operation are developed.

Olivares, M. A.

2011-12-01

74

Application of the HEC-5 hydropower routines. Training document  

Microsoft Academic Search

This training document was written to assist users of computer program HEC-5, Simulation of Flood Control and Conservation Systems in hydropower applications. This document supplements the program Users Manual, which is the basic documentation for the program. The chapters on hydropower application describe the data requirements, program operation, and program output for the HEC-5 hydropower routines. Hydropower applications cover power

Bonner

1980-01-01

75

Turbine Engine Diagnostics System Study (Final Report).  

National Technical Information Service (NTIS)

The results of a system study for the Turbine Engine Diagnostics (TED) program are presented. This research project was initiated to develop a method of approach and prototype design for a system capable of predicting the failure of rotating parts in turb...

B. K. Mcquiston R. L. Dehoff

1991-01-01

76

Stability Simulation of Wind Turbine Systems  

Microsoft Academic Search

A simulation and digital computer modeling effort is described in which a wind turbine-generator system is adapted for stability evaluation using a large scale transient stability computer program. Component models of the MOD-2 wind generator system are described and their digital model equations are provided. A versatile wind velocity model is described, which provides the capability of simulating a wide

P. M. Anderson; Anjan Bose

1983-01-01

77

Wind turbine blade pitch control system  

Microsoft Academic Search

Wind turbine blade pitch control system including hydraulic actuators which pivotally drive the blades about the longitudinal axis thereof to adjust the blade pitch. The actuators are supplied with hydraulic fluid from independent sources thereof for normal blade pitch adjustment and feathering. Means are provided which, during feathering, isolate the pressurization and drain of the actuators from certain system components,

1982-01-01

78

Development of advanced gas turbine systems  

SciTech Connect

The objective of the Advanced Turbine Systems study is to investigate innovative natural gas fired cycle developments to determine the feasibility of achieving 60% efficiency within a 8-year time frame. The potential system was to be environmentally superior, cost competitive and adaptable to coal-derived fuels. Progress is described.

Bannister, R.L.; Little, D.A.; Wiant, B.C.

1993-11-01

79

Advanced turbine systems: Studies and conceptual design  

SciTech Connect

The ABB selection for the Advanced Turbine System (ATS) includes advanced developments especially in the hot gas path of the combustion turbine and new state-of-the-art units such as the steam turbine and the HRSG. The increase in efficiency by more than 10% multiplicative compared to current designs will be based on: (1) Turbine Inlet Temperature Increase; (2) New Cooling Techniques for Stationary and Rotating Parts; and New Materials. Present, projected component improvements that will be introduced with the above mentioned issues will yield improved CCSC turbine performance, which will drive the ATS selected gas-fired reference CC power plant to 6 % LHV or better. The decrease in emission levels requires a careful optimization of the cycle design, where cooling air consumption has to be minimized. All interfaces of the individual systems in the complete CC Plant need careful checks, especially to avoid unnecessary margins in the individual designs. This study is an important step pointing out the feasibility of the ATS program with realistic goals set by DOE, which, however, will present challenges for Phase II time schedule of 18 months. With the approach outlined in this study and close cooperation with DOE, ATS program success can be achieved to deliver low emissions and low cost of electricity by the year 2002. The ABB conceptual design and step approach will lead to early component demonstration which will help accelerate the overall program objectives.

van der Linden, S.; Gnaedig, G.; Kreitmeier, F.

1993-11-01

80

Dynamic performance analysis of a hybrid wind turbine generator system  

Microsoft Academic Search

The dynamic performances of a hybrid wind turbine generator system using a shaft generator system are investigated. The hybrid system consists of a wind turbine and generator, a rectifier, a current-source thyristor inverter, a synchronous generator driven by a prime mover and a duplex reactor. The configuration of the hybrid wind turbine generator system is explained first, and a dynamic

Yuutaro Fujii; Chihiro Hasegawa; Fujio Tatsuta; Shoji Nishikata

2008-01-01

81

Gas turbine cogeneration systems matriculate in universities  

SciTech Connect

Many colleges and universities are learning that cogeneration is an efficient and cost-effective way to produce energy. This technology can reduce district heating and cooling expenses while improving reliability of services to students and faculty. These projects are based on aeroderivative gas turbines manufactured by GE Marine & Industrial Engines. The complete generator sets, including the gas turbine, generator, acoustic enclosures and controls were built by Stewart & Stevenson Services, Inc. The 68 MW combined-cycle cogeneration facility at the University of Northern Colorado at Greeley is credited for saving the institution an estimated US$1 million per year over its previous energy system. 4 figs.

Nelson, D. [GE Marine & Industrial Engines, Evendale, OH (United States); Prochaska, J. [Stewart & Stevenson Services, Inc., Houston, TX (United States)

1994-05-01

82

Slag processing system for direct coal-fired gas turbines  

Microsoft Academic Search

Direct coal-fired gas turbine systems and methods for their operation are provided by this invention. The gas turbine system includes a primary zone for burning coal in the presence of compressed air to produce hot combustion gases and debris, such as molten slag. The turbine system further includes a secondary combustion zone for the lean combustion of the hot combustion

Pillsbury; Paul W

1990-01-01

83

Cooling system optimisation of turbine guide vane  

Microsoft Academic Search

This paper discuses the problem of cooling system optimisation within a gas turbine vane. The analysis involves the optimisation of size and location of internal cooling passages within the vane. Cooling is provided with ten circular passages and heat is transported only convectively. The task is approached in 3D configuration. Each passage is fed with cooling air of constant parameters

Grzegorz Nowak; W?odzimierz Wróblewski

2009-01-01

84

Wind Turbine Generator System Power Performance Test Report for the ARE442 Wind Turbine  

SciTech Connect

This report summarizes the results of a power performance test that NREL conducted on the ARE 442 wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 12: Power Performance Measurements of Electricity Producing Wind Turbines, IEC 61400-12-1 Ed.1.0, 2005-12. However, because the ARE 442 is a small turbine as defined by IEC, NREL also followed Annex H that applies to small wind turbines. In these summary results, wind speed is normalized to sea-level air density.

van Dam, J.; Jager, D.

2010-02-01

85

UNIVERSITY TURBINE SYSTEMS RESEARCH PROGRAM SUMMARY AND DIRECTORY  

Microsoft Academic Search

The South Carolina Institute for Energy Studies (SCIES), administratively housed at Clemson University, has participated in the advancement of combustion turbine technology for over a decade. The University Turbine Systems Research Program, previously referred to as the Advanced Gas Turbine Systems Research (AGTSR) program, has been administered by SCIES for the U.S. DOE during the 1992-2003 timeframe. The structure of

Lawrence P. Golan; Richard A. Wenglarz

2004-01-01

86

A High Efficiency PSOFC\\/ATS-Gas Turbine Power System  

Microsoft Academic Search

A study is described in which the conceptual design of a hybrid power system integrating a pressurized Siemens Westinghouse solid oxide fuel cell generator and the Mercury{trademark} 50 gas turbine was developed. The Mercury{trademark} 50 was designed by Solar Turbines as part of the US. Department of Energy Advanced Turbine Systems program. The focus of the study was to develop

W. L. Lundberg; G. A. Israelson; M. D. Moeckel; S. E. Veyo; R. A. Holmes; P. R. Zafred; J. E. King; R. E. Kothmann

2001-01-01

87

Modeling wind turbines in power system dynamics simulations  

Microsoft Academic Search

In this panel contribution, the modeling of wind turbines in power systems dynamics simulations is discussed. First the three most important actual wind turbine concepts are described. Then, various classes of wind turbine models are introduced and it will be discussed which model type can be integrated in power system dynamics simulation software. To conclude, it will be argued that

J. G. Slootweg; S. W. H. de Haan; H. Polinder; W. L. Kling

2001-01-01

88

Integrating steam turbine control with energy management systems  

SciTech Connect

The use of steam turbines in industrial applications to produce electrical power while supplying steam to process headers (cogeneration) is common in many plants today. To meet industrial system requirements turbine control has evolved over the years to a level of sophistication today where the many varied steam requirements can be easily accommodated with existing turbine control systems. Some of these systems are functionally described and the method of operator interface outlined. With rising fuel costs and the development of plant computer control, turbine control systems must now interface with centralized energy managment systems. The methodology for interfacing mechanical hydraulic and electro-hydraulic turbine control is functionally described.

Nock, H.T.; Wagner, J.B.; Medeiros, C.W.

1981-01-01

89

Closed loop air cooling system for combustion turbines  

DOEpatents

Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts. 1 fig.

Huber, D.J.; Briesch, M.S.

1998-07-21

90

Closed loop air cooling system for combustion turbines  

DOEpatents

Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts.

Huber, David John (North Canton, OH); Briesch, Michael Scot (Orlando, FL)

1998-01-01

91

Leaf seal for transition duct in turbine system  

DOEpatents

A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a leaf seal contacting the interface member to provide a seal between the interface member and the turbine section.

Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

2013-06-11

92

IEA Wind Task 24 Integration of Wind and Hydropower Systems; Volume 1: Issues, Impacts, and Economics of Wind and Hydropower Integration.  

National Technical Information Service (NTIS)

This report describes the background, concepts, issues and conclusions related to the feasibility of integrating wind and hydropower, as investigated by the members of IEA Wind Task 24. It is the result of a four-year effort involving seven IEA member cou...

T. Acker

2011-01-01

93

Initialization of wind turbine models in power system dynamics simulations  

Microsoft Academic Search

As a result of increasing environmental concern, increasing amounts of electricity are generated from renewable sources. One way of generating electricity from renewable sources is to use wind turbines. A tendency to erect more wind turbines can be observed. As a result of this, in the near future wind turbines may start to influence the behavior of electrical power systems.

J. G. Slootweg; H. Polinder; W. L. Kling

2001-01-01

94

Modeling of wind turbines for power system studies  

Microsoft Academic Search

In this paper, the modeling of wind turbines for power system studies is investigated. Complexities of various parts of a wind turbine model, such as aerodynamic conversion, drive train, and generator representation, are analyzed. The results are verified by field measurements made on a stall-regulated fixed-speed wind turbine. The modeling focuses on deriving a representation that is suitable for use

Tomas Petru; Torbjörn Thiringer

2002-01-01

95

Optimizing wind turbine control system parameters  

NASA Astrophysics Data System (ADS)

The impending expiration of the levelized period in the Interim Standard Offer Number 4 (ISO4) utility contracts for purchasing wind-generated power in California mandates, more than ever, that windplants be operated in a cost-effective manner. Operating plans and approaches are needed that maximize the net revenue from wind parks--after accounting for operation and maintenance costs. This paper describes a design tool that makes it possible to tailor a control system of a wind turbine (WT) to maximize energy production while minimizing the financial consequences of fatigue damage to key structural components. Plans for code enhancements to include expert systems and fuzzy logic are discussed, and typical results are presented in which the code is applied to study the controls of a generic Danish 15-m horizontal axis wind turbine (HAWT).

Schluter, Larry L.; Vachon, William A.

1993-05-01

96

Advanced Micro Turbine System (AMTS) -C200 Micro Turbine -Ultra-Low Emissions Micro Turbine  

SciTech Connect

In September 2000 Capstone Turbine Corporation commenced work on a US Department of Energy contract to develop and improve advanced microturbines for power generation with high electrical efficiency and reduced pollutants. The Advanced MicroTurbine System (AMTS) program focused on: (1) The development and implementation of technology for a 200 kWe scale high efficiency microturbine system (2) The development and implementation of a 65 kWe microturbine which meets California Air Resources Board (CARB) emissions standards effective in 2007. Both of these objectives were achieved in the course of the AMTS program. At its conclusion prototype C200 Microturbines had been designed, assembled and successfully completed field demonstration. C65 Microturbines operating on natural, digester and landfill gas were also developed and successfully tested to demonstrate compliance with CARB 2007 Fossil Fuel Emissions Standards for NOx, CO and VOC emissions. The C65 Microturbine subsequently received approval from CARB under Executive Order DG-018 and was approved for sale in California. The United Technologies Research Center worked in parallel to successfully execute a RD&D program to demonstrate the viability of a low emissions AMS which integrated a high-performing microturbine with Organic Rankine Cycle systems. These results are documented in AMS Final Report DOE/CH/11060-1 dated March 26, 2007.

Capstone Turbine Corporation

2007-12-31

97

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM  

SciTech Connect

The quarterly activities of the Advanced Gas Turbine Systems Research (AGTSR) program are described in this quarterly report. As this program administers research, we have included all program activity herein within the past quarter as dated. More specific research progress reports are provided weekly at the request of the AGTSR COR and are being sent to NETL. As for the administration of this program, items worthy of note are presented in extended bullet format following the appropriate heading.

Lawrence P. Golan

2001-07-01

98

Advanced coal-fueled gas turbine systems  

SciTech Connect

The combustion system discussed here incorporates a modular three- stage slagging combustor concept. Fuel-rich conditions inhibit NO{sub x} formation from fuel nitrogen in the first stage; also in the first stage, sulfur is captured with sorbent; coal ash and sulfated sorbent are removed from the combustion gases by inertial means in the second stage by the use of an impact separator and slagging cyclone separator in series. Final oxidation of the fuel-rich gases, and dilution to achieve the desired turbine inlet conditions are accomplished in the third stage, which is maintained sufficiently lean so that here, too, NO{sub x} formation is inhibited. The objective of this contract is to establish the technology required for subsequent commercial development and application by the private sector of utility-size direct coal-fueled gas turbines. Emissions from these units are to meet or be lower than the Environment Protection Agency's (EPA's) New Source Performance Standards (NSPS) for a pulverized coal-=fired steam turbine generator plant.

Not Available

1991-09-01

99

Testing Small Wind Turbines at NREL's NWTC (Presentation)  

Microsoft Academic Search

Reducing barriers to wind energy expansion, stabilizing the market, and expanding the number of small wind turbine (SWT) systems installed in the United States are important goals for the Department of Energy's (DOE) Wind and Hydropower Technologies Program. One of the barriers for the distributed wind market is the lack of SWT systems that are independently tested and certified. The

Sinclair

2008-01-01

100

Advanced Turbine Systems Program industrial system concept development  

SciTech Connect

Solar approached Phase II of ATS program with the goal of 50% thermal efficiency. An intercolled and recuperated gas turbine was identified as the ultimate system to meet this goal in a commercial gas turbine environment. With commercial input from detailed market studies and DOE`s ATS program, Solar redefined the company`s proposed ATS to fit both market and sponsor (DOE) requirements. Resulting optimized recuperated gas turbine will be developed in two sizes, 5 and 15 MWe. It will show a thermal efficiency of about 43%, a 23% improvement over current industrial gas turbines. Other ATS goals--emissions, RAMD (reliability, availability, maintainability, durability), cost of power--will be met or exceeded. During FY95, advanced development of key materials, combustion and component technologies proceeded to the point of acceptance for inclusion in ATS Phase III.

Gates, S.

1995-12-31

101

Optimization of the operation of a two-reservoir hydropower system  

NASA Astrophysics Data System (ADS)

A method for optimizing the operation of a system of two hydraulically separate reservoirs serving the same demand area for hydropower production is described. The reservoir system is assumed to be operated, and import and export decisions made, so as to maximize the value of energy produced while considering the value of water stored in the reservoirs at the end of the model time horizon. The optimization considers uncertain reservoir inflows, energy demands, and electricity prices, and is subject to physical and operational constraints. The proposed method consists of two cascaded models. A longer-term monthly model based upon dynamic programming and linear programming is used to estimate the value of water stored in each reservoir as a function of the storage in both reservoirs, as well as the marginal values of water storage in the two reservoirs. Linear programming is used to evaluate the recursive equation in the dynamic program by making tradeoffs between releasing water, making energy trades, and keeping water in storage for the next month. The monthly energy value functions are input to the shorter-term model, which is based upon stochastic linear programming with recourse. The shorter-term model allows for the planning of operations and the calculation of marginal water values over periods shorter than one month. The time horizon in the shorter-term model is divided into time steps that may be of variable duration. Uncertainty in the model is handled through a scenario tree. Scenarios describe the values assumed by the inflows, demands, and prices in each time step. Sub-periods allow for the consideration of on- and off-peak periods. Application of the proposed model is made to a system based roughly on the two main river systems in the BC Hydro system---the Peace and Columbia. It is found that the marginal value of storage in the Columbia Reservoir is generally dependent upon the storage in both the Columbia and Peace Reservoirs, and vice versa. Regions of storage existed in which the marginal energy value in one reservoir was independent of storage in the second, although no general rules for identifying these regions were found.

Nash, Garth Andrew

102

What's Going On in There? Efforts to Describe the Experiences of Turbine-Passed Fish  

Microsoft Academic Search

The U.S. Department of Energy's Advanced Hydropower Turbine System (AHTS) Program is developing advanced, fish-friendly turbines using a variety of integrated research efforts. The AHTS Program supports field studies, including the development of sensor fish - portable, fish-shaped instrument packages that measure pressure, acceleration, and other physical parameters experienced during passage through the turbine. Advanced computational analyses extend the data

Glenn F. ?ada; Garold L. Sommers; Michael J. Sale

103

Hydrogen production at hydro-power plants  

NASA Astrophysics Data System (ADS)

A tentative design for hydrogen-producing installations at hydropower facilities is discussed from technological, economic and applications viewpoints. The plants would use alternating current to electrolyze purified river water. The hydrogen would be stored in gas or liquid form and oxygen would be sold or vented to the atmosphere. The hydrogen could later be burned in a turbine generator for meeting peak loads, either in closed or open cycle systems. The concept would allow large hydroelectric plants to function in both base- and peak-load modes, thus increasing the hydraulic utilization of the plant and the capacity factor to a projected 0.90. Electrolyzer efficiencies ranging from 0.85-0.90 have been demonstrated. Excess hydrogen can be sold for other purposes or, eventually, as domestic and industrial fuel, at prices competitive with current industrial hydrogen.

Tarnay, D. S.

104

Hydrogen turbines for space power systems: A simplified axial flow gas turbine model  

SciTech Connect

This paper descirbes a relatively simple axial flow gas expansion turbine mass model, which we developed for use in our space power system studies. The model uses basic engineering principles and realistic physical properties, including gas conditions, power level, and material stresses, to provide reasonable and consistent estimates of turbine mass and size. Turbine design modifications caused by boundary layer interactions, stress concentrations, stage leakage, or bending and thermal stresses are not accounted for. The program runs on an IBM PC, uses little computer time and has been incorporated into our system-level space power platform analysis computer codes. Parametric design studies of hydrogen turbines using this model are presented for both nickel superalloy and carbon/carbon composite turbines. The effects of speed, pressure ratio, and power level on hydrogen turbine mass are shown and compared to a baseline case 100-MWe, 10,000-rpm hydrogen turbine. Comparison with more detailed hydrogen turbine designs indicates that our simplified model provides mass estimates that are within 25% of the ones provided by more complex calculations. 8 figs.

Hudson, S.L.

1988-01-01

105

Gas turbine engine component cooling system  

SciTech Connect

In a gas turbine engine including a compressor supported in an annular frame, the frame having a front frame portion extending upstream of the compressor, the front frame having radially inner and outer surfaces, the inner surface defining a flowpath to the compressor, a system is described for cooling an engine component which consists of: the front frame including an aperture extending therethrough; a housing for mounting the engine component therein, including a plurality of heat transfer fins extending outwardly therefrom; and the housing being mounted to the radially outer surface of the front frame so that the heat transfer fins extend through the aperture and into the flowpath.

Colman, M.E.; Goeller, R.E.

1986-09-02

106

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM  

SciTech Connect

The activities of the Advanced Gas Turbine Systems Research (AGTSR) program for the reporting period October 1, 2002 to December 31, 2002 are described in this quarterly report. No new membership, workshops, research projects, internships, faculty fellowships or special studies were initiated during this reporting period. Contract completion is set for June 30, 2003. During the report period, six research progress reports were received (3 final reports and 3 semi-annual reports). The University of Central Florida contract SR080 was terminated during this period, as UCF was unable to secure research facilities. AGTSR now projects that it will under spend DOE obligated funds by approximately 340-350K$.

Lawrence P. Golan

2003-05-01

107

Wind turbine data acquisition and analysis system  

SciTech Connect

Under Department of Energy (DOE) sponsorship, Sandia Laboratories has implemented a program to develop vertical-axis wind turbine (VAWT) systems. One aspect of this program has been the development of an instrumented test site adjacent to Sandia Laboratories' Technical Area I on Kirtland Air Force Base. Three VAWTs are now in operation on this test site. This paper describes the data acquisition and analyses system developed to meet the needs of the VAWT test site. The system employs a 16-bit work-length minicomputer as the major element in a stand-alone configuration. A variety of peripheral devices perform the required data acquisition functions and provide for data display and analysis. Included is a disk-based software operating system that supports a mass storage-file system, high-level language, and auxiliary software procedures.

Stiefeld, B.

1978-07-01

108

Representing wind turbine electrical generating systems in fundamental frequency simulations  

Microsoft Academic Search

Increasing numbers of wind turbines are being erected. In the near future, they may start to influence the dynamics of electrical power systems by interacting with conventional generation equipment and with loads. The impact of wind turbines on the dynamics of electrical power systems therefore becomes an important subject, studied by means of power system dynamics simulations. Various types of

J. G. Slootweg; H. Polinder; W. L. Kling

2003-01-01

109

Performance optimization of a dual-rotor wind turbine system  

Microsoft Academic Search

We are building an efficient and smart wind turbine system. The significant features of this turbine are its dual rotor blade system which is positioned horizontally at upwind and downwind locations, its drive train which is installed horizontally inside the tower with a new efficient induction generator, and its control and safety systems. The project focuses mainly on the methodology

Riadh W. Y. Habash; Voicu Groza; Pierre Guillemette

2010-01-01

110

Stability Improvement of Wind Turbine Systems by STATCOM  

Microsoft Academic Search

The development of renewable energy based generation technologies attracts more and more attention. In particularly large number of wind turbines are being installed and connected to power system. In some countries or networks, the penetration level of wind power is significant high so as to affect the power system operation and control. Consequently, the stable operation of wind turbine systems

Z. Chen; F. Blaabjerg; Y. Hu

2006-01-01

111

Coupled Dynamic Modeling of Floating Wind Turbine Systems: Preprint  

Microsoft Academic Search

This article presents a collaborative research program that the Massachusetts Institute of Technology (MIT) and the National Renewable Energy Laboratory (NREL) have undertaken to develop innovative and cost-effective floating and mooring systems for offshore wind turbines in water depths of 10-200 m. Methods for the coupled structural, hydrodynamic, and aerodynamic analysis of floating wind turbine systems are presented in the

E. N. Wayman; P. D. Sclavounos; S. Butterfield; J. Jonkman; W. Musial

2006-01-01

112

Advanced turbine systems program conceptual design and product development  

NASA Astrophysics Data System (ADS)

This report describes progress made in the advanced turbine systems program conceptual design and product development. The topics of the report include selection of the Allison GFATS, castcool technology development for industrial engines test plan and schedule, code development and background gathering phase for the ultra low NOx combustion technology task, active turbine clearance task, and water vapor/air mixture cooling of turbine vanes task.

1995-01-01

113

Advanced coal-fueled gas turbine systems  

SciTech Connect

Westinghouse's Advanced Coal-Fueled Gas Turbine System Program (DE-AC2l-86MC23167) was originally split into two major phases - a Basic Program and an Option. The Basic Program also contained two phases. The development of a 6 atm, 7 lb/s, 12 MMBtu/hr slagging combustor with an extended period of testing of the subscale combustor, was the first part of the Basic Program. In the second phase of the Basic Program, the combustor was to be operated over a 3-month period with a stationary cascade to study the effect of deposition, erosion and corrosion on combustion turbine components. The testing of the concept, in subscale, has demonstrated its ability to handle high- and low-sulfur bituminous coals, and low-sulfur subbituminous coal. Feeding the fuel in the form of PC has proven to be superior to CWM type feed. The program objectives relative to combustion efficiency, combustor exit temperature, NO[sub x] emissions, carbon burnout, and slag rejection have been met. Objectives for alkali, particulate, and SO[sub x] levels leaving the combustor were not met by the conclusion of testing at Textron. It is planned to continue this testing, to achieve all desired emission levels, as part of the W/NSP program to commercialize the slagging combustor technology.

Not Available

1992-09-01

114

Pilot Scale Tests Alden/Concepts NREC Turbine  

SciTech Connect

Alden Research Laboratory, Inc. has completed pilot scale testing of the new Alden/Concepts NREC turbine that was designed to minimize fish injury at hydropower projects. The test program was part of the U.S. Department of Energy's Advanced Hydropower Turbine Systems Program. The prototype turbine operating point was 1,000 cfs at 80ft head and 100 rpm. The turbine was design to: (1) limit peripheral runner speed; (2) have a high minimum pressure; (3) limit pressure change rates; (4) limit the maximum flow shear; (5) minimize the number and total length of leading blade edges; (6) maximize the distance between the runner inlet and the wicket gates and minimize clearances (i.e., gaps) between other components; and (7) maximize the size of flow passages.

Thomas C. Cook; George E.Hecker; Stephen Amaral; Philip Stacy; Fangbiao Lin; Edward Taft

2003-09-30

115

WIND TURBINE DRIVETRAIN TEST FACILITY DATA ACQUISITION SYSTEM  

SciTech Connect

The Wind Turbine Drivetrain Test Facility (WTDTF) is a state-of-the-art industrial facility used for testing wind turbine drivetrains and generators. Large power output wind turbines are primarily installed for off-shore wind power generation. The facility includes two test bays: one to accommodate turbine nacelles up to 7.5 MW and one for nacelles up to 15 MW. For each test bay, an independent data acquisition system (DAS) records signals from various sensors required for turbine testing. These signals include resistance temperature devices, current and voltage sensors, bridge/strain gauge transducers, charge amplifiers, and accelerometers. Each WTDTF DAS also interfaces with the drivetrain load applicator control system, electrical grid monitoring system and vibration analysis system.

Mcintosh, J.

2012-01-03

116

Steam turbine restart temperature maintenance system and method  

SciTech Connect

A restart temperature maintenance system is described for a steam turbine system; the steam turbine system comprising a steam turbine, the turbine including a rotation shaft, an outer metal shell means. The restart temperature maintenance system consists of: (a) fastener means affixed to the outer surface of the shell means at predetermined positions; (b) air gap spacer means affixed to the outer surface of the shell means, the air gap spacer means substantially covering the shell means; (c) a plurality of electric heating blanket means of predetermined size and shape positioned in insulative relationship over the air gap spacer means and the heating blanket means maintained in predetermined position by the fastener means; (d) heat sensor means affixed to the outer metal shell means of the steam turbine in predetermined position; (e) power supply means for supplying power to the heating blanket means; (f) heat sensor monitor and controller means connected in circuit between the power supply means and the heat sensor means.

McClelland, T.R.

1986-04-29

117

Status of the U.S. Department of Energy's Advanced Hydropower Turbine Systems Program.  

National Technical Information Service (NTIS)

This paper describes the relative importances of various actinide, fission product and light element isotopes with respect to storage and transportation shielding applications for spent fuel. Using simple computational models, the relative contributions o...

M. J. Sale

2001-01-01

118

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM  

SciTech Connect

The quarterly activities of the Advanced Gas Turbine Systems Research (AGTSR) program are described in this quarterly report. As this program administers research, we have included all program activity herein within the past quarter as dated. More specific research progress reports are provided weekly at the request of the AGTSR COR and are being sent to NETL As for the administration of this program, items worthy of note are presented in extended bullet format following the appropriate heading. No new memberships, workshops, research projects, internships, faculty fellowships or special studies were initiated during this reporting period. Contract completion is set for June 30, 2003. During the report period, nine subcontractor reports were received (5 final reports and 4 semi-annual reports). The report technology distribution is as follows: 3--aero-heat transfer, 2--combustion and 4--materials. AGTSR continues to project that it will under spend DOE obligated funds by approximately $329K.

Lawrence P. Golan

2003-05-01

119

Commercialization of coal-fueled gas turbine systems  

Microsoft Academic Search

The overall goal of this program is to develop and demonstrate the technological bases for economically attractive, commercial, coal- fired gas turbine systems. Objectives to accomplish this goal include these: identify candidate technical approaches to meet the challenges of using coal as a turbine fuel, screen the candidate technical approaches by testing their relative performance and evaluating their effects on

C. Wilkes; R. A. Wenglarz

1992-01-01

120

Fuel Flexible Turbine System (FFTS) Program  

SciTech Connect

In this fuel flexible turbine system (FFTS) program, the Parker gasification system was further optimized, fuel composition of biomass gasification process was characterized and the feasibility of running Capstone MicroTurbine(TM) systems with gasification syngas fuels was evaluated. With high hydrogen content, the gaseous fuel from a gasification process of various feed stocks such as switchgrass and corn stover has high reactivity and high flashback propensity when running in the current lean premixed injectors. The research concluded that the existing C65 microturbine combustion system, which is designed for natural gas, is not able to burn the high hydrogen content syngas due to insufficient resistance to flashback (undesired flame propagation to upstream within the fuel injector). A comprehensive literature review was conducted on high-hydrogen fuel combustion and its main issues. For Capstone?s lean premixed injector, the main mechanisms of flashback were identified to be boundary layer flashback and bulk flow flashback. Since the existing microturbine combustion system is not able to operate on high-hydrogen syngas fuels, new hardware needed to be developed. The new hardware developed and tested included (1) a series of injectors with a reduced propensity for boundary layer flashback and (2) two new combustion liner designs (Combustion Liner Design A and B) that lead to desired primary zone air flow split to meet the overall bulk velocity requirement to mitigate the risk of core flashback inside the injectors. The new injector designs were evaluated in both test apparatus and C65/C200 engines. While some of the new injector designs did not provide satisfactory performance in burning target syngas fuels, particularly in improving resistance to flashback. The combustion system configuration of FFTS-4 injector and Combustion Liner Design A was found promising to enable the C65 microturbine system to run on high hydrogen biomass syngas. The FFTS-4 injector was tested in a C65 engine operating on 100% hydrogen and with the redesigned combustion liner - Combustion Liner Design A - installed. The results were promising for the FFTS program as the system was able to burn 100% hydrogen fuel without flashback while maintaining good combustion performance. While initial results have been demonstrated the feasibility of this program, further research is needed to determine whether these results will be repeated with FFTS-4 injectors installed in all injector ports and over a wide range of operating conditions and fuel variations.

None

2012-12-31

121

Impact of New Trends in Programming and Marketing of Electricity to the Method of Operation of the Hydropower Plants in Slovak Electricity Supply System  

Microsoft Academic Search

A considerable attention has been paid to the optimal utilization of the dynamic characteristics of the hydropower plants in electric supply system of Slovakia. For more than 20 years, simplified optimization solutions have been used for the operation planning as well as the real time operative control. The issue of the assuring the support services in the field of the

Peter Šulek

122

Hydropower potential in Turkey  

SciTech Connect

Turkey has a total hydropower potential of 433 GW that is equal to 1.2% of the total hydropower potential of the world and to 14% of European hydropower potential. Only 125 GW of the total hydroelectric potential of Turkey can be economically used. By the commissioning of new hydropower plants, which are under construction, 34% of the economically usable potential of the country would be tapped. At the present, hydropower energy is an important energy source for Turkey due to its useful characteristics such as being renewable, clean, and less of an impact on the environment, and a cheap and domestic energy source.

Kaygusuz, K. [Karadeniz Technical Univ., Trabzon (Turkey). Dept. of Chemistry

1999-08-01

123

Water turbine technology for small power stations  

NASA Astrophysics Data System (ADS)

The paper examines hydro-power stations and the efficiency and costs of using water turbines to run them. Attention is given to different turbine types emphasizing the use of Kaplan-turbines and runners. Hydraulic characteristics and mechanical properties of low head turbines and small turbines, constructed of fully fabricated steel plate structures, are presented.

Salovaara, T.

1980-02-01

124

Inspection system for a turbine blade region of a turbine engine  

DOEpatents

An inspection system formed at least from a viewing tube for inspecting aspects of a turbine engine during operation of the turbine engine. An outer housing of the viewing tube may be positioned within a turbine engine using at least one bearing configured to fit into an indentation of a support housing to form a ball and socket joint enabling the viewing tube to move during operation as a result of vibrations and other movements. The viewing tube may also include one or more lenses positioned within the viewing tube for viewing the turbine components. The lenses may be kept free of contamination by maintaining a higher pressure in the viewing tube than a pressure outside of the viewing tube and enabling gases to pass through an aperture in a cap at a viewing end of the viewing tube.

Smed, Jan P. (Winter Springs, FL); Lemieux, Dennis H. (Casselberry, FL); Williams, James P. (Orlando, FL)

2007-06-19

125

Fuel cell/gas turbine system performance studies  

SciTech Connect

Because of the synergistic effects (higher efficiencies, lower emissions) of combining a fuel cell and a gas turbine into a power generation system, many potential system configurations were studied. This work is focused on novel power plant systems by combining gas turbines, solid oxide fuel cells, and a high-temperature heat exchanger; these systems are ideal for the distributed power and on- site markets in the 1-5 MW size range.

Lee, G.T.; Sudhoff, F.A.

1996-12-31

126

Verification of a Flow3d Mathematical Model by a Physical Hydraulic Model of a Turbine Intake Structure of a Small Hydropower Plant and a Practical Use of the Mathematical Model  

NASA Astrophysics Data System (ADS)

The Drava Power Plants Utility company is the owner of all hydropower plants on the Drava River, Slovenia. On the flood waves relief structure of the Zlatoli?je HPP headrace channel the construction of a turbine intake structure for the Melje small hydropower plant is planned. The Melje small HPP shall exploit the biological minimum discharge for electricity production. Since the structure shall be small, the price of a physical hydraulic model research, in comparison with the price of the structure itself, would be too high. Consequently, the client decided to test the designed structure in the cheapest possible way and ordered a 3D mathematical model of the turbine intake structure. By this mathematical model the designed form of the intake structure should be verified, or, in case of non-compliance, a modified form of such structure which would meet the required modes of the SHPP operation should be proposed. Since such a 3D mathematical model hasn't been used for a hydraulic modelling of this type yet, the project performers were slightly mistrustful of the results obtained by it. Regarding our long years' experiences with physical modelling we decided to construct also a physical hydraulic model in order to be able to verify the designed form of the intake structure and then to use the results for the 3D mathematical model calibration. A partial physical hydraulic model was constructed in the Laboratory for Hydraulic Research in Ljubljana in a model scale of 1:20. For construction and implementation of all the necessary research only 30 days were needed. Simultaneously with the physical model all the preparatory arrangements for the geometry of the mathematical model were going on. During the further development of the mathematical model, also some additional researches on the physical model were performed. Considering the time needed to fully establish the functionality of the mathematical model, it showed up to be very time consuming even in comparison to the construction, all necessary adaptations and the research on the physical model. A commercially available computational fluid dynamic (CFD) program, which solves the Reynolds-averaged Navier-Stokes equations, was used to model physical model setup. The mathematical model was applied for the modelling of the zone of the same size as that on the physical model. The measurements of the water flow velocity, which were performed on the physical model, served us for the verification of results, obtained by means of the mathematical model. This paper gives a comparison of physical and mathematical models research results. However, it presents the results of the project form, as well as those of the proposed form, too.

Vosnjak, S.; Mlacnik, J.

2009-04-01

127

77 FR 32497 - Grant of Authority for Subzone Status; Mitsubishi Power Systems Americas, Inc. (Wind Turbine...  

Federal Register 2010, 2011, 2012, 2013

...Power Systems Americas, Inc. (Wind Turbine Nacelles and Generating Sets) Fort Smith...special-purpose subzone at the wind turbine nacelle and generating set manufacturing...activity related to the manufacturing of wind turbine nacelles and generating sets at the...

2012-06-01

128

A centrifugal pump used as a turbine  

SciTech Connect

Due to the high cost of putting up conventional turbines for micro-hydropower installations, Inversin (1986) mentioned the use of pumps being run in reverse to function as turbines. Typical performance characteristics of a centrifugal pump running as a turbine are shown in a figure. Pump/turbine maximum efficiencies tend to occur over a wide range of capacity. This study is concerned with the use of non-conventional hydro equipment, locally and readily available for small rural electricity applications. Here, the operation of a small centrifugal pump, used as a turbine and coupled with a conventional car alternator, was investigated. The article reveals a method for evaluating not only this but other small generating systems for appropriateness to the conditions of the site.

Yap, F.U.; Lasnier, F. (Asian Institute of Technology, Bangkok (Thailand))

1990-06-01

129

Advanced Turbine Systems (ATS) program conceptual design and product development  

SciTech Connect

Achieving the Advanced Turbine Systems (ATS) goals of 60% efficiency, single-digit NO{sub x}, and 10% electric power cost reduction imposes competing characteristics on the gas turbine system. Two basic technical issues arise from this. The turbine inlet temperature of the gas turbine must increase to achieve both efficiency and cost goals. However, higher temperatures move in the direction of increased NO{sub x} emission. Improved coatings and materials technologies along with creative combustor design can result in solutions to achieve the ultimate goal. GE`s view of the market, in conjunction with the industrial and utility objectives, requires the development of Advanced Gas Turbine Systems which encompass two potential products: a new aeroderivative combined-cycle system for the industrial market, and a combined-cycle system for the utility sector that is based on an advanced frame machine. The GE Advanced Gas Turbine Development program is focused on two specific products: (1) a 70 MW class industrial gas turbine based on the GE90 core technology utilizing an innovative air cooling methodology; (2) a 200 MW class utility gas turbine based on an advanced Ge heavy-duty machine utilizing advanced cooling and enhancement in component efficiency. Both of these activities required the identification and resolution of technical issues critical to achieving ATS goals. The emphasis for the industrial ATS was placed upon innovative cycle design and low emission combustion. The emphasis for the utility ATS was placed on developing a technology base for advanced turbine cooling, while utilizing demonstrated and planned improvements in low emission combustion. Significant overlap in the development programs will allow common technologies to be applied to both products. GE Power Systems is solely responsible for offering GE products for the industrial and utility markets.

NONE

1996-08-31

130

MATERIALS AND COMPONENT DEVELOPMENT FOR ADVANCED TURBINE SYSTEMS ? PROJECT SUMMARY  

SciTech Connect

Future hydrogen-fired or oxy-fuel turbines will likely experience an enormous level of thermal and mechanical loading, as turbine inlet temperatures (TIT) approach ?1425-1760?C (?2600-3200?F) with pressures of ?300-625 psig, respectively. Maintaining the structural integrity of future turbine components under these extreme conditions will require (1) durable thermal barrier coatings (TBCs), (2) high temperature creep resistant metal substrates, and (3) effective cooling techniques. While advances in substrate materials have been limited for the past decades, thermal protection of turbine airfoils in future hydrogen-fired and oxy-fuel turbines will rely primarily on collective advances in the TBCs and aerothermal cooling. To support the advanced turbine technology development, the Office of Research and Development (ORD) at National Energy Technology Laboratory (NETL) has continued its collaborative research efforts with the University of Pittsburgh and West Virginia University, while working in conjunction with commercial material and coating suppliers. This paper presents the technical accomplishments that were made during FY09 in the initial areas of advanced materials, aerothermal heat transfer and non-destructive evaluation techniques for use in advanced land-based turbine applications in the Materials and Component Development for Advanced Turbine Systems project, and introduces three new technology areas ? high temperature overlayer coating development, diffusion barrier coating development, and oxide dispersion strengthened (ODS) alloy development that are being conducted in this effort.

M. A. Alvin

2010-06-18

131

Materials/manufacturing element of the Advanced Turbine Systems Program  

SciTech Connect

The technology based portion of the Advanced Turbine Systems Program (ATS) contains several subelements which address generic technology issues for land-based gas-turbine systems. One subelement is the Materials/ Manufacturing Technology Program which is coordinated by DOE Oak Ridge Operations and Oak Ridge National Laboratory (ORNL). The work in this subelement is being performed predominantly by industry with assistance from universities and the national laboratories. Projects in this sub-element are aimed toward hastening the incorporation of new materials and components in gas turbines.

Karnitz, M.A.; Holcomb, R.S.; Wright, I.G.; Ferber, M.K. [Oak Ridge National Lab., TN (United States); Hoffman, E.E. [USDOE Oak Ridge Operations Office, TN (United States)

1995-12-31

132

Advanced coal-fueled gas turbine systems  

Microsoft Academic Search

Several technology advances since the early coal-fueled turbine programs that address technical issues of coal as a turbine fuel have been developed in the early 1980s: Coal-water suspensions as fuel form, improved methods for removing ash and contaminants from coal, staged combustion for reducing NO emissions from fuel-bound nitrogen, and greater understanding of deposition\\/erosion\\/corrosion and their control. Several Advanced Coal-Fueled

Wenglarz

1994-01-01

133

Research on the hydraulic turbine vertical vibration power flow in the head cover system  

NASA Astrophysics Data System (ADS)

On the basis of the prior models about the vertical vibration of the hydraulic vibration source, this research introduced a sub-system—head cover. Head cover is one of the main paths when vibration is transferred from the water vibration source to the stable structure. This essay aims to analyze the hydraulic turbine vertical vibration power flow in the head cover system. The research is based on the power flow theory and the probability perturbation method; meanwhile, it considered on the reciprocal coupling effect of the water machine parts and power house structure, etc. Therefore, the results of can clearly provide the random power flow of the vibration transfer path system, which including the head cover system, in frequency domain by given of some uncertain factors in one project. In conclusions, the research provide an overall analysis on the hydropower station vertical vibration transfer path; and it suggest some simplified and efficient solutions in the analysis on the vibration path with some random parameters.

Zhi, B. P.; Ma, Z. Y.

2012-11-01

134

Agricultural vs. hydropower tradeoffs in the operation of the High Aswan Dam  

SciTech Connect

A tradeoff relationship is defined between hydropower and agriculture for the monthly operations of the High Aswan Dam under current water availability conditions. A stochastic dynamic programming model is employed which incorporates the physical constraints (e.g., reservoir storage limits, turbine capacity, allowable reservoir releases, etc.) of the High Aswan Dam system. Variations of monthly reservoir releases for agriculatural purposes are imposed on the system through this model, and consequent impacts on hydropower production at the high dam are studied. The results show that once operating rules are optimized for current agricultural demands an 11-20% increase in firm monthly hydropower production can be gained when summer irrigation allocations are reduced by 25%. A simple benefit/cost analysis concludes that potential benefits obtained by gains in firm monthly hydropower are nearly equal to potential losses in the agricultural sector when summer allocations are reduced by 5-10%. Operation questions raised by the introduction of a new emergency flood control spillway at Toshka are addressed. Recommendations are made for the operating guidelines of the high dam releases in light of these results.

Oven-Thompson, K. (Metcalf and Eddy, Boston, MA); Alercon, L.; Marks, D.H.

1982-12-01

135

NEXT GENERATION GAS TURBINE (NGGT) SYSTEMS STUDY  

SciTech Connect

Building upon the 1999 AD Little Study, an expanded market analysis was performed by GE Power Systems in 2001 to quantify the potential demand for an NGGT product. This analysis concluded that improvements to the US energy situation might be best served in the near/mid term (2002-2009) by a ''Technology-Focused'' program rather than a specific ''Product-Focused'' program. Within this new program focus, GEPS performed a parametric screening study of options in the three broad candidate categories of gas turbines: aero-derivative, heavy duty, and a potential hybrid combining components of the other two categories. GEPS's goal was to determine the best candidate systems that could achieve the DOE PRDA expectations and GEPS's internal design criteria in the period specified for initial product introduction, circa 2005. Performance feasibility studies were conducted on candidate systems selected in the screening task, and critical technology areas were identified where further development would be required to meet the program goals. DOE PRDA operating parameters were found to be achievable by 2005 through evolutionary technology. As a result, the study was re-directed toward technology enhancements for interim product introductions and advanced/revolutionary technology for potential NGGT product configurations. Candidate technologies were identified, both evolutionary and revolutionary, with a potential for possible development products via growth step improvements. Benefits were analyzed from two perspectives: (1) What would be the attributes of the top candidate system assuming the relevant technologies were developed and available for an NGGT market opportunity in 2009/2010; and (2) What would be the expected level of public benefit, assuming relevant technologies were incorporated into existing new and current field products as they became available. Candidate systems incorporating these technologies were assessed as to how they could serve multiple applications, both in terms of incorporation of technology into current products, as well as to an NGGT product. In summary, potential program costs are shown for development of the candidate systems along with the importance of future DOE enabling participation. Three main conclusions have been established via this study: (1) Rapid recent changes within the power generation regulatory environment and the resulting ''bubble'' of gas turbine orders has altered the timing and relative significance associated with the conclusions of the ADL study upon which the original DOE NGGT solicitation was based. (2) Assuming that the relevant technologies were developed and available for an NGGT market opportunity circa 2010, the top candidate system that meets or exceeds the DOE PRDA requirements was determined to be a hybrid aero-derivative/heavy duty concept. (3) An investment by DOE of approximately $23MM/year to develop NGGT technologies near/mid term for validation and migration into a reasonable fraction of the installed base of GE F-class products could be leveraged into $1.2B Public Benefit, with greatest benefits resulting from RAM improvements. In addition to the monetary Public Benefit, there is also significant benefit in terms of reduced energy consumption, and reduced power plant land usage.

Unknown

2001-12-05

136

INDUSTRIAL ADVANCED TURBINE SYSTEMS: DEVELOPMENT & DEMONSTRATION  

SciTech Connect

Rochelle Municipal Utilities (RMU) was selected for the field evaluation site and placed an order for the first Mercury 50 generator set in November 1997. Field evaluation of the Mercury 50 package at Rochelle began in June 2000 and ran through December 2003. A total of 4,749 package hours were achieved on two generation 2-design engines. Engine Serial Number (ESN) 6 was installed in April 2000 and accumulated 2,324 hours and 267 starts until it was exchanged for ESN 7 in April 2001. ESN 7 ran until completion of the field evaluation period accumulating 2,426 hours and 292 starts. While the 4,749 hours of package operation falls short of the 8,000-hour goal, important lessons were learned at the Rochelle site that resulted in bringing a far superior generation 3 Mercury 50 package to commercialization. Among the issues raised and resolved were: (1) Engine shaft stability; (2) Engine power and efficiency degradation--Air inlet Restrictions, Compressor Efficiency, Turbine Efficiency, Exhaust System Cracks/Leaks; (3) Recuperator Core Durability; (4) Cold Weather Operations; (5) Valve Actuator Reliability; and (6) Remote Operation and Maintenance Support.

George Escola

2004-02-20

137

Turbine speed control system based on a fuzzy-PID  

NASA Astrophysics Data System (ADS)

The flexibility demand of marine nuclear power plant is very high, the multiple parameters of the marine nuclear power plant with the once-through steam generator are strongly coupled, and the normal PID control of the turbine speed can’t meet the control demand. This paper introduces a turbine speed Fuzzy-PID controller to coordinately control the steam pressure and thus realize the demand for quick tracking and steady state control over the turbine speed by using the Fuzzy control’s quick dynamic response and PID control’s steady state performance. The simulation shows the improvement of the response time and steady state performance of the control system.

Sun, Jian-Hua; Wang, Wei; Yu, Hai-Yan

2008-12-01

138

PRESSURIZED SOLID OXIDE FUEL CELL/GAS TURBINE POWER SYSTEM  

SciTech Connect

Power systems based on the simplest direct integration of a pressurized solid oxide fuel cell (SOFC) generator and a gas turbine (GT) are capable of converting natural gas fuel energy to electric power with efficiencies of approximately 60% (net AC/LHV), and more complex SOFC and gas turbine arrangements can be devised for achieving even higher efficiencies. The results of a project are discussed that focused on the development of a conceptual design for a pressurized SOFC/GT power system that was intended to generate 20 MWe with at least 70% efficiency. The power system operates baseloaded in a distributed-generation application. To achieve high efficiency, the system integrates an intercooled, recuperated, reheated gas turbine with two SOFC generator stages--one operating at high pressure, and generating power, as well as providing all heat needed by the high-pressure turbine, while the second SOFC generator operates at a lower pressure, generates power, and provides all heat for the low-pressure reheat turbine. The system cycle is described, major system components are sized, the system installed-cost is estimated, and the physical arrangement of system components is discussed. Estimates of system power output, efficiency, and emissions at the design point are also presented, and the system cost of electricity estimate is developed.

W.L. Lundberg; G.A. Israelson; R.R. Moritz (Rolls-Royce Allison); S.E. Veyo; R.A. Holmes; P.R. Zafred; J.E. King; R.E. Kothmann (Consultant)

2000-02-01

139

Thermal chemical recuperation method and system for use with gas turbine systems  

DOEpatents

A system and method for efficiently generating power using a gas turbine, a steam generating system (20, 22, 78) and a reformer. The gas turbine receives a reformed fuel stream (74) and an air stream and produces shaft power and exhaust. Some of the thermal energy from the turbine exhaust is received by the reformer (18). The turbine exhaust is then directed to the steam generator system that recovers thermal energy from it and also produces a steam flow from a water stream. The steam flow and a fuel stream are directed to the reformer that reforms the fuel stream and produces the reformed fuel stream used in the gas turbine.

Yang, Wen-Ching (Export, PA); Newby, Richard A. (Pittsburgh, PA); Bannister, Ronald L. (Winter Springs, FL)

1999-01-01

140

Advanced coal-fueled industrial cogeneration gas turbine system  

Microsoft Academic Search

Advances in coal-fueled gas turbine technology over the past few years, together with recent DOE-METC sponsored studies, have served to provide new optimism that the problems demonstrated in the past can be economically resolved and that the coal-fueled gas turbine can ultimately be the preferred system in appropriate market application sectors. The objective of the Solar\\/METC program is to prove

R. T. LeCren; L. H. Cowell; M. A. Galica; M. D. Stephenson; C. S. Wen

1991-01-01

141

Coordinate Control of Wind Turbine and Battery in Wind Turbine Generator System  

NASA Astrophysics Data System (ADS)

Battery is installed for with wind power generator to level the output power fluctuations, since output power fluctuations of wind power generator are large. However, if large battery is installed in wind turbine generator, the capital cost for wind power system will increase. Hence, the smallest size of battery should be preferable to save the capital cost. In this paper, we propose a methodology for controlling combined system output power and storage energy capacity of battery system. The system consists of wind turbine generator and battery energy storage system. The generated power fluctuation in low and high frequency range are smoothed by pitch angle control and battery charge or discharge. This coordinated control reduces the rated battery capacity and windmill blade stress. In our proposed method, we apply H? control theory to achieve good response and robustness. The effectiveness of the proposed control system is simulated.

Senjyu, Tomonobu; Kikunaga, Yasuaki; Tokudome, Motoki; Uehara, Akie; Yona, Atsushi; Funabashi, Toshihisa

142

Development of gas turbine steam injection water recovery (SIWR) system  

SciTech Connect

This paper describes and discusses a closed-loop'' steam injection water recovery (SIWR) cycle that was developed for steam-injected gas turbine applications. This process is needed to support gas turbine steam injection especially in areas where water cannot be wasted and complex water treatment is discouraged. The development of the SIWR was initiated by NOVA in an effort to reduce the environmental impact of operating gas turbines and to find suitable solution for its expanding gas transmission system to meet further air emission restrictions. While turbine steam injection provides many benefits, it has not been considered for remote, less supported environments such as gas transmission applications due to its high water consumption. The SIWR process can alleviate this problem regardless of the amount of injection required. The paper also covers conceptual designs of a prototype SIWR system on a small gas turbine unit. However, because of relatively high costs, it is generally believed that the system is more attractive to larger size turbines and especially when it is used in conjunction with cogeneration or combined cycle applications.

Nguyen, H.B.; Otter, A. den (NOVA Corp., Edmonton, Alberta (Canada))

1994-01-01

143

Thermochemically recuperated and steam cooled gas turbine system  

DOEpatents

A gas turbine system in which the expanded gas from the turbine section is used to generate the steam in a heat recovery steam generator and to heat a mixture of gaseous hydrocarbon fuel and the steam in a reformer. The reformer converts the hydrocarbon gas to hydrogen and carbon monoxide for combustion in a combustor. A portion of the steam from the heat recovery steam generator is used to cool components, such as the stationary vanes, in the turbine section, thereby superheating the steam. The superheated steam is mixed into the hydrocarbon gas upstream of the reformer, thereby eliminating the need to raise the temperature of the expanded gas discharged from the turbine section in order to achieve effective conversion of the hydrocarbon gas.

Viscovich, Paul W. (Longwood, FL); Bannister, Ronald L. (Winter Springs, FL)

1995-01-01

144

Power electronics converters for wind turbine systems  

Microsoft Academic Search

The steady growth of installed wind power which reached 200 GW capacity in 2010, together with the up-scaling of the single wind turbine power capability - 7 MW's has been announced by manufacturers - has pushed the research and development of power converters towards full scale power conversion, lowered cost pr kW, and increased power density and the need for

F. Blaabjerg; M. Liserre; K. Ma

2011-01-01

145

Fuel effects on gas turbine combustion systems  

Microsoft Academic Search

The effects of variations in properties and characteristics of liquid hydrocarbon base fuels in gas turbine engine combustors was investigated. Baseline fuels consisted of military specification materials processed from petroleum and shale oil. Experimental fuels were comprised of liquid petroleum blends that were prepared specifically to exhibit desired physical and chemical properties. These fuels were assessed for their influence on

1984-01-01

146

Fuel effects on gas turbine combustion systems  

Microsoft Academic Search

The effects of variations in properties and characteristics of liquid hydrocarbon-base fuels in gas turbine engine combustors was investigated. Baseline fuels consisted of military-specification materials processed from petroleum and shale oil. Experimental fuels were comprised of liquid petroleum blends that were prepared specifically to exhibit desired physical and chemical properties. These fuels were assessed for their influence on ignition and

1984-01-01

147

Optimizing turbine-condenser system steam consumption  

Microsoft Academic Search

When a turbine with both bleeding and condensing sections is designed, it is possible to vary widely the load distribution between the two sections and, hence to optimize operation of the plant under given conditions. If air condensers are used for the condensation of steam, the ratio of the amount of bled steam and that of steam passed into the

Novotny

1987-01-01

148

Shipboard Maintenance and Repair System - Steam-Turbine Plant Prototype.  

National Technical Information Service (NTIS)

Using the basic system design and the diesel plant prototype developed under MarAd Contract 5-38042 and inputs from ship operators, the steam-turbine plant prototype system was developed and installed on the LASH TURKIYE. The system is comprised of a prog...

J. E. Robinson R. E. Kelly J. W. Viele

1979-01-01

149

BIOMASS GASIFICATION AND POWER GENERATION USING ADVANCED GAS TURBINE SYSTEMS  

Microsoft Academic Search

A multidisciplined team led by the United Technologies Research Center (UTRC) and consisting of Pratt & Whitney Power Systems (PWPS), the University of North Dakota Energy & Environmental Research Center (EERC), KraftWork Systems, Inc. (kWS), and the Connecticut Resource Recovery Authority (CRRA) has evaluated a variety of gasified biomass fuels, integrated into advanced gas turbine-based power systems. The team has

David Liscinsky

2002-01-01

150

UTILITY ADVANCED TURBINE SYSTEMS(ATS) TECHNOLOGY READINESS TESTING  

Microsoft Academic Search

The following paper provides an overview of GE's H System{trademark} technology, and specifically, the design, development, and test activities associated with the DOE Advanced Turbine Systems (ATS) program. There was intensive effort expended in bringing this revolutionary advanced technology program to commercial reality. In addition to describing the magnitude of performance improvement possible through use of H System{trademark} technology, this

Kenneth A. Yackly

2001-01-01

151

Feasibility of Floating Platform Systems for Wind Turbines: Preprint  

SciTech Connect

This paper provides a general technical description of several types of floating platforms for wind turbines. Platform topologies are classified into multiple- or single-turbine floaters and by mooring method. Platforms using catenary mooring systems are contrasted to vertical mooring systems and the advantages and disadvantages are discussed. Specific anchor types are described in detail. A rough cost comparison is performed for two different platform architectures using a generic 5-MW wind turbine. One platform is a Dutch study of a tri-floater platform using a catenary mooring system, and the other is a mono-column tension-leg platform developed at the National Renewable Energy Laboratory. Cost estimates showed that single unit production cost is $7.1 M for the Dutch tri-floater, and $6.5 M for the NREL TLP concept. However, value engineering, multiple unit series production, and platform/turbine system optimization can lower the unit platform costs to $4.26 M and $2.88 M, respectively, with significant potential to reduce cost further with system optimization. These foundation costs are within the range necessary to bring the cost of energy down to the DOE target range of $0.05/kWh for large-scale deployment of offshore floating wind turbines.

Musial, W.; Butterfield, S.; Boone, A.

2003-11-01

152

SYSTEMIC ASSESSMENT AND ANALYSIS OF FACTORS AFFECT THE RELIABILITY OF A WIND TURBINE  

Microsoft Academic Search

Nowadays, the availability of wind turbines usually approaches the 98%. The objective is to increase the turbines availability, by improving the wind turbine reliability especially for offshore plants. The wind turbines reliability is a pivotal factor in the successfully function of a wind power plant. High reliability can be achieved by understanding and minimizing the failures of the system. Maintenance

Pantelis N. Botsaris; D. Pitsa

2012-01-01

153

Lightning-accommodation systems for wind-turbine-generator safety  

SciTech Connect

Wind turbine generators are being evaluated as alternate sources of electrical energy. The wind turbine safety program identifies the naturally occurring lightning phenomenon as a hazard with the potential to cause loss of program objectives, injure personnel, damage system instrumentation, structure or support equipment and facilities. The Lewis Research Center is responsible for the development of large wind turbines in the 100 kW to multimegawatt size range. In support of this program, several candidate methods of lightning accommodation for each blade have been designed, analyzed, and tested by submitting sample blade sections to simulated lightning. At the present time, lightning accommodation systems for composite blades are being individually developed. Their effectiveness is evaluated by submitting the systems to simulated lightning strikes. The test data are analyzed and system designs are reviewed on the basis of the analysis. This activity is directed at defining design and procedural constraints, requirements for safety devices and warning methods, special procedures, protective equipment and personnel training.

Bankaitis, H.

1981-01-01

154

Advanced coal-fueled industrial cogeneration gas turbine system  

SciTech Connect

Advances in coal-fueled gas turbine technology over the past few years, together with recent DOE-METC sponsored studies, have served to provide new optimism that the problems demonstrated in the past can be economically resolved and that the coal-fueled gas turbine can ultimately be the preferred system in appropriate market application sectors. The objective of the Solar/METC program is to prove the technical, economic, and environmental feasibility of a coal-fired gas turbine for cogeneration applications through tests of a Centaur Type H engine system operated on coal fuel throughout the engine design operating range. The five-year program consists of three phases, namely: (1) system description; (2) component development; (3) prototype system verification. A successful conclusion to the program will initiate a continuation of the commercialization plan through extended field demonstration runs.

LeCren, R.T.; Cowell, L.H.; Galica, M.A.; Stephenson, M.D.; Wen, C.S.

1991-07-01

155

Slag processing system for direct coal-fired gas turbines  

DOEpatents

Direct coal-fired gas turbine systems and methods for their operation are provided by this invention. The gas turbine system includes a primary zone for burning coal in the presence of compressed air to produce hot combustion gases and debris, such as molten slag. The turbine system further includes a secondary combustion zone for the lean combustion of the hot combustion gases. The operation of the system is improved by the addition of a cyclone separator for removing debris from the hot combustion gases. The cyclone separator is disposed between the primary and secondary combustion zones and is in pressurized communication with these zones. In a novel aspect of the invention, the cyclone separator includes an integrally disposed impact separator for at least separating a portion of the molten slag from the hot combustion gases.

Pillsbury, Paul W. (Winter Springs, FL)

1990-01-01

156

Site-specific air inlet systems for combustion turbines  

SciTech Connect

Each combustion turbine installation has peculiar to it site-related characteristics that, if considered carefully, will define the type of inlet system that best fits the turbine`s operational requirements. Turbine performance and component service life greatly depend on the ability of an air inlet system to reduce or eliminate contaminants entering the system. If these contaminants are not effectively removed, then fouling, erosion, and low- and high-temperature corrosion will occur. High-efficiency air filtration and low resistance is important from the initial start-up to the recommended filter change out. Users and operators are fast coming to the conclusion that a single component/filter house design cannot be used successfully for all geographic regions and for all gas turbine duties and specific site conditions. Additionally, any well-designed filter house should provide an economical solution for initial cost, as well as continued operating cost, and through the use of modular design accommodate the addition of evaporative coolers and future upgrades in air filter components. New high and ultra-high filter efficiencies also have lower initial resistance and, when combined with a pleated panel prefilter, have the highest system dust holding capacity available today.

Goulding, C.H.; Gidley, D.S. [Farr Co., El Segundo, CA (United States)

1995-10-01

157

Infrared applications for steam turbine condenser systems  

Microsoft Academic Search

Infrared inspection of the main steam condensers at the Peach Bottom Atomic Power Station has been utilized successfully in detecting condenser air in-leakage problems. Air in-leakage lowers the condenser's vacuum, thus decreasing the condenser's efficiency. This creates backpressure on the turbine which lowers its efficiency, resulting in fewer megawatts generated. Air in-leakage also creates an increase in off-gas flow which

Mark A. Lanius

2000-01-01

158

A control model for dependable hydropower capacity optimization  

NASA Astrophysics Data System (ADS)

In this article a control model that can be used to determine the dependable power capacity of a hydropower system is presented and tested. The model structure consists of a turbine load allocation module and a reservoir control module and allows for a detailed representation of hydroelectric facilities and various aspects of water management. Although this scheme is developed for planning purposes, it can also be used operationally with minor modifications. The model is applied to the Lanier-Allatoona-Carters reservoir system on the Chattahoochee and Coosa River Basins, in the southeastern United States. The case studies demonstrate that the more traditional simulation-based approaches often underestimate dependable power capacity. Firm energy optimization with or without dependable capacity constraints is taken up in a companion article [Georgakakos et al., this issue].

Georgakakos, Aris P.; Yao, Huaming; Yu, Yongqing

159

Horizontal axis wind turbine systems: optimization using genetic algorithms  

NASA Astrophysics Data System (ADS)

A method for the optimization of a grid-connected wind turbine system is presented. The behaviour of the system components is coupled in a non-linear way, and optimization must take into account technical and economical aspects of the complete system design. The annual electrical energy cost is estimated using a cost model for the wind turbine rotor, nacelle and tower and an energy output model based on the performance envelopes of the power coefficient of the rotor, CP, on the Weibull parameters k and c and on the power law coefficient of the wind profile. In this study the site is defined with these three parameters and the extreme wind speed Vmax. The model parameters vary within a range of possible values. Other elements of the project (foundation, grid connection, financing cost, etc.) are taken into account through coefficients. The optimal values of the parameters are determined using genetic algorithms, which appear to be efficient for such a problem. These optimal values were found to be very different for a Mediterranean site and a northern European site using our numerical model. Optimal wind turbines at the Mediterranean sites considered in this article have an excellent profitability compared with reference northern European wind turbines. Most of the existing wind turbines appear to be well designed for northern European sites but not for Mediterranean sites.

Diveux, T.; Sebastian, P.; Bernard, D.; Puiggali, J. R.; Grandidier, J. Y.

2001-10-01

160

Hydropower Resource Assessment Modeling Results  

Microsoft Academic Search

The U.S. Department of Energy�s Hydropower Program developed the Hydropower Evaluation Software to model the undeveloped hydropower resources in the United States based on environmental, legal, and institutional constraints. This Hydropower Resource Assessment effort has identified 5,677 sites that have an undeveloped total capacity of about 30,000 megawatts.;\\u000aThe Hydropower Evaluation Software uses the Federal Energy Regulatory Commission�s Hydroelectric Power

A. M. Conner; J. E. Francfort

1999-01-01

161

Response of Fixed Speed Wind Turbines to System Frequency Disturbances  

Microsoft Academic Search

This paper analyzes the impact of system frequency variations on the steady-state operation point of fixed speed induction generators used in wind turbine generation systems (WTGS). An analytic method to predict the values of angular speed, torque and current during and after a frequency disturbance is presented. The proposed method as well permits to establish the operation limits in order

Andreas Sumper; Oriol Gomis-Bellmunt; Antoni Sudria-Andreu; Roberto Villafafila-Robles; Joan Rull-Duran

2009-01-01

162

Advanced coal fueled gas turbine system definition: Topical report  

Microsoft Academic Search

The coal-fired gas turbine system definition and economic assessments are based on the Coal Burning Locomotive Study previously conducted by the GE Transportation Systems Business Operations with Burlington Northern and Norfolk Southern railroad sponsorship, and later with additional funding from the United States Department of Energy. The objectives of that study were to validate the feasibility of locomotive designs using

A. M. James; M. W. Horner

1987-01-01

163

Abradable Dual-Density Ceramic Turbine Seal System.  

National Technical Information Service (NTIS)

A plasma sprayed dual density ceramic abradable seal system for direct application to the HPT seal shroud of small gas turbine engines. The system concept is based on the thermal barrier coating and depends upon an additional layer of modified density cer...

D. L. Clingman B. Schechter K. R. Cross J. R. Cavanagh

1981-01-01

164

System for removing uncondensed products from a steam turbine condenser  

Microsoft Academic Search

This patent describes improvement in a steam condenser system for a turbine, which system includes: a condenser having an outlet for conveying uncondensed products out of the condenser; an exhauster having a housing, an inlet connected between the housing and the condenser outlet, an exhaust outlet connected to the housing, and a rotatable member, disposed in the housing and rotatable

P. W. Viscovich; J. A. Martin

1991-01-01

165

Gas turbine systems research and development program. Executive summary  

Microsoft Academic Search

This systems analysis has identified major opportunities for gas turbine combined cycles burning coal. Both simplified gasification and direct combustion of coal-water mixture options have the potential to offer low-cost energy systems that have high plant thermal efficiency and reduced emissions of environmental pollutants. Research and development needs have been identified which will provide the technical bases for decisions to

Cincotta

1985-01-01

166

Slag processing system for direct coal-fired gas turbines  

Microsoft Academic Search

Direct coal-fired gas turbine systems and methods for their operation are provided by this invention. The systems include a primary combustion compartment coupled to an impact separator for removing molten slag from hot combustion gases. Quenching means are provided for solidifying the molten slag removed by the impact separator, and processing means are provided forming a slurry from the solidified

Pillsbury; Paul W

1990-01-01

167

Small coal burning gas turbine for modular integrated utility systems  

Microsoft Academic Search

Summary of a series of design studies pertaining to small coal-burning gas turbines for modular integrated utility systems. The effects of major parameters on both the capital cost and the thermal efficiency are discussed. The principal problems in the development of such systems are shown to be associated with the fluidized bed combustion chamber. These problems include the possibility of

A. P. Fraas

1974-01-01

168

Slag processing system for direct coal-fired gas turbines  

Microsoft Academic Search

This patent describes direct coal-fired gas turbine systems and methods for their operation. The systems include a primary combustion compartment coupled to an impact separator for removing molten slag from hot combustion gases. Quenching means are provided for solidifying the molten slag removed by the impact separator, and processing means are provided forming a slurry from the solidified slag for

Pillsbury

1990-01-01

169

Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system  

DOEpatents

In a combined cycle system having a multi-pressure heat recovery steam generator, a gas turbine and steam turbine, steam for cooling gas turbine components is supplied from the intermediate pressure section of the heat recovery steam generator supplemented by a portion of the steam exhausting from the HP section of the steam turbine, steam from the gas turbine cooling cycle and the exhaust from the HP section of the steam turbine are combined for flow through a reheat section of the HRSG. The reheated steam is supplied to the IP section inlet of the steam turbine. Thus, where gas turbine cooling steam temperature is lower than optimum, a net improvement in performance is achieved by flowing the cooling steam exhausting from the gas turbine and the exhaust steam from the high pressure section of the steam turbine in series through the reheater of the HRSG for applying steam at optimum temperature to the IP section of the steam turbine.

Tomlinson, Leroy Omar (Niskayuna, NY); Smith, Raub Warfield (Ballston Lake, NY)

2002-01-01

170

Locks and Dam 1 (Ford Dam), Mississippi River, draft feasibility report and environmental assessment for hydropower  

SciTech Connect

This report presents a detailed evaluation of additional hydropower potential at Locks and Dam 1. An earlier evaluation in a reconnaissance level report (September 1981) indicated preliminary feasibility for added hydropower at this Federal navigation project site. The original Federal navigation locks and dam project included a foundation for a hydropower plant to be developed by non-Federal interests. The existing hydropower plant and equipment are owned and operated by the Ford Motor Company. The existing four turbines generate a combined nameplate capacity of 14.4 MW (megawatts).

Not Available

1984-08-01

171

Water augmented indirectly-fired gas turbine systems and method  

DOEpatents

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a higher driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1,000.degree. C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, Thomas F. (Lebanon, PA); Parsons, Jr., Edward J. (Morgantown, WV)

1992-01-01

172

Water augmented indirectly-fired gas turbine system and method  

DOEpatents

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a high driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1000{degrees}C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, T.F.; Parsons, E.J. Jr.

1991-12-31

173

Water augmented indirectly-fired gas turbine system and method  

DOEpatents

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a high driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1000[degrees]C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, T.F.; Parsons, E.J. Jr.

1991-01-01

174

Final Report: Retrofit Aeration System (RAS) for Francis Turbine  

SciTech Connect

Osage Plant and Bagnell Dam impounds the Osage River forming the Lake of the Ozarks in Missouri. Since it is nearly 100 feet deep, the lake stratifies during the summer months causing low DO water to be discharged into the Osage river below the dam. To supplement DO, the turbines are vented during the low DO season. AmerenUE is continually researching new methods of DO enhancement. New turbines, manufactured by American Hydro Corporation, were installed in Units 3 & 5 during the spring of 2002. Additional vent capacity and new nosecones were included in the new turbine design. The retrofit aeration system is an attempt to further enhance the DO in the tailrace by installation of additional venting capability on Unit 6 (not upgraded with new turbine) and refining design on special nosecones which will be mounted on both Unit 3 (upgraded turbine) and Unit 6. Baseline DO testing for Units 3 & 6 was conducted mid August, 2002. This data wascompared to further tests planned for the summer of 2003 and 2004 after installation of the retrofit aeration system.

Alan Sullivan; DOE Project Officer Keith Bennett

2006-08-01

175

Wind Turbine Generator System Safety and Function Test Report for the Southwest Windpower H40 Wind Turbine  

Microsoft Academic Search

The objective of this test was to evaluate the safety and function characteristics of the Whisper H40 wind turbine. The general requirements of wind turbine safety and function tests are defined in the IEC standard WT01. The testing was conducted in accordance with the National Wind Technology Center (NWTC) Quality Assurance System, including the NWTC Certification Team Certification Quality Manual

J. van Dam; H. Link; M. Meadors; J. Bianchi

2002-01-01

176

Fuel effects on gas turbine combustion systems  

SciTech Connect

The effects of variations in properties and characteristics of liquid hydrocarbon-base fuels in gas turbine engine combustors was investigated. Baseline fuels consisted of military-specification materials processed from petroleum and shale oil. Experimental fuels were comprised of liquid petroleum blends that were prepared specifically to exhibit desired physical and chemical properties. These fuels were assessed for their influence on ignition and performance characteristics in combustors of the F100, TF30, and J57 (TF33) engines at simulated operating conditions. In general, during relatively short duration tests, combustor ignition and performance became increasingly poorer as fuel quality deviated from specification or historical values.

Mosier, S.A.

1984-01-01

177

Advanced Turbine Systems Program: Conceptual design and product development. Quarterly status report, May--July 1994.  

National Technical Information Service (NTIS)

The goal of the overall Advanced Turbine Systems (ATS) program is to develop and commercialize ultrahigh-efficiency gas-turbine-based power systems for utility and industrial applications. This contract will complete conceptual design and begin component ...

1994-01-01

178

Report to Congress: Comprehensive Program Plan for Advanced Turbine Systems  

SciTech Connect

Consistent with the Department of Energy (DOE) mission, the Advanced Turbine Systems (ATS) Program will develop more efficient gas turbine systems for both utility and industrial electric power generation (including cogeneration). The Program will develop base-load power systems for commercial offering in the year 2000. Although the target fuel is natural gas, the ATS will be adaptable to coal and biomass firing. All ATS will exhibit these characteristics: Ultra-high efficiency [utility systems: 60 percent (lower heating value basis); industrial systems: 15 percent improvement over today`s best gas turbine systems]; Environmental superiority [reduced nitrogen oxides (NO{sub x}), carbon dioxide (CO{sub 2}), carbon monoxide (CO), and unburned hydrocarbons (UHC)]; and Cost competitiveness [10 percent lower cost of electricity]. This Program Plan was requested in the House, Senate, and Conference Reports on the FY 1993 Interior and Related Agencies Appropriations Act, Public Law 102--381, and is consistent with the Energy Policy Act of 1992, which (in Section 2112) identifies work for improving gas turbines. This plan outlines the 8-year ATS Program and discusses rationale and planning. Total Program costs are estimated to be $700 million, consisting of an approximate $450 million government share and an approximate $250 million cost-share by industrial participants.

Not Available

1993-07-01

179

Report to Congress: Comprehensive Program Plan for Advanced Turbine Systems  

NASA Astrophysics Data System (ADS)

Consistent with the Department of Energy (DOE) mission, the Advanced Turbine Systems (ATS) Program will develop more efficient gas turbine systems for both utility and industrial electric power generation (including cogeneration). The program will develop base-load power systems for commercial offering in the year 2000. Although the target fuel is natural gas, the ATS will be adaptable to coal and biomass firing. All ATS will exhibit these characteristics: Ultra-high efficiency utility systems: 60 percent (lower heating value basis); industrial systems--15 percent improvement over today's best gas turbine systems; Environmental superiority (reduced nitrogen oxides (NO(x)), carbon dioxide (CO2), carbon monoxide (CO), and unburned hydrocarbons (UHC)); and cost competitiveness (10 percent lower cost of electricity). This Program Plan was requested in the House, Senate, and Conference Reports on the FY 1993 Interior and Related Agencies Appropriations Act, Public Law 102--381, and is consistent with the Energy Policy Act of 1992, which (in Section 2112) identifies work for improving gas turbines. This plan outlines the 8-year ATS Program and discusses rationale and planning. Total Program costs are estimated to be $700 million, consisting of an approximate $450 million government share, and an approximate $250 million cost-share by industrial participants.

1993-07-01

180

Thermal Performance of Wind Turbine Power System's Engine Room  

NASA Astrophysics Data System (ADS)

Greatly expanded use of wind energy has been proposed to reduce dependence on fossil and nuclear fuels for electricity generation. For wind turbine power generation, as a mature technology in the field of wind power utilization, its large-scale deployment is limited by the cooling technology. Therefore, the temperature distribution of the wind turbine power generation is a key issue for the design of the cooling system. It is because the characteristics of cooling system have a great effect on the performance of the wind turbine power generation. Based on some assumptions and simplifications, a thermal model is developed to describe the heat transfer behavior of wind turbine power system. The numerical calculation method is adopted to solve the governing equation. The heat generation and heat flux are investigated with a given operating boundary. The achieved results can be used to verify whether the cooling system meets the design requirements. Meanwhile, they also can reveal that among the influencing factors, the meteorological conditions, generated output and operation state as well seriously influence its thermal performance. Numerical calculation of the cooling system enables better understanding and results in performance improvement of the system.

Liu, Zhili; Jiang, Yanlong; Zhou, Nianyong; Shi, Hong; Kang, Na; Wang, Yu

181

Advanced, Environmentally Friendly Hydroelectric Turbines for the Restoration of Fish and Water Quality  

SciTech Connect

Hydroelectric power contributes about 10 percent of the electrical energy generated in the United States, and nearly 20 percent of the world?s electrical energy. The contribution of hydroelectric generation has declined in recent years, often as a consequence of environmental concerns centering around (1) restriction of upstream and downstream fish passage by the dam, and (2) alteration of water quality and river flows by the impoundment. The Advanced Hydropower Turbine System (AHTS) Program of the U.S. Department of Energy is developing turbine technology which would help to maximize global hydropower resources while minimizing adverse environmental effects. Major technical goals for the Program are (1) the reduction of mortality among turbine-passed fish to 2 percent or less, compared to current levels ranging up to 30 percent or greater; and (2) development of aerating turbines that would ensure that water discharged from reservoirs has a dissolved oxygen concentration of at least 6 mg/L. These advanced, ?environmentally friendly? turbines would be suitable both for new hydropower installations and for retrofitting at existing dams. Several new turbine designs that have been he AHTS program are described.

Brookshier, P.A.; Cada, G.F.; Flynn, J.V.; Rinehart, B.N.; Sale, M.J.; Sommers, G.L.

1999-09-06

182

The Use of Advanced Hydroelectric Turbines to Improve Water Quality and Fish Populations  

SciTech Connect

Hydroelectric power contributes about 10 percent of the electrical energy generated in the United States, and nearly 20 percent of the world?s electrical energy. It is a renewable energy source that can contribute significantly to reduction of greenhouse gases by offsetting conventional carbon-based electricity generation. However, rather than growing in importance, hydroelectric generation has actually declined in recent years, often as a consequence of environmental concerns centering around (1) restriction of upstream and downstream fish passage by the dam, and (2) alteration of water quality and river flows by the impoundment. The Advanced Hydropower Turbine System (AHTS) Program of the U.S. Department of Energy is developing turbine technology which would help to maximize global hydropower resources while minimizing adverse environmental effects. Major technical goals for the Program are (1) the reduction of mortality among turbine-passed fish to 2 percent or less, compared to current levels ranging up to 30 percent or greater; and (2) development of aerating turbines that would ensure that water discharged from reservoirs has a dissolved oxygen concentration of at least 6 mg/L. These advanced, ?environmentally friendly? turbines would be suitable both for new hydropower installations and for retrofitting at existing dams. Several new turbine designs that have been developed in the initial phases of the AHTS program are described.

Brookshier, P.A.; Cada, G.F.; Flynn, J.V.; Rinehart, B.N.; Sale, M.J.; Sommers, G.L.

1999-09-20

183

System for pressure modulation of turbine sidewall cavities  

DOEpatents

A system and method are provided for controlling cooling air flow for pressure modulation of turbine components, such as the turbine outer sidewall cavities. The pressure at which cooling and purge air is supplied to the turbine outer side wall cavities is modulated, based on compressor discharge pressure (Pcd), thereby to generally maintain the back flow margin (BFM) so as to minimize excessive leakage and the consequent performance deterioration. In an exemplary embodiment, the air pressure within the third stage outer side wall cavity and the air pressure within the fourth stage outer side wall cavity are each controlled to a respective value that is a respective prescribed percentage of the concurrent compressor discharge pressure. The prescribed percentage may be determined from a ratio of the respective outer side wall pressure to compressor discharge pressure at Cold Day Turn Down (CDTD) required to provide a prescribed back flow margin.

Leone, Sal Albert (Scotia, NY); Book, Matthew David (Altamont, NY); Banares, Christopher R. (Schenectady, NY)

2002-01-01

184

Wind turbine reduced-order model for power system analysis  

Microsoft Academic Search

This papers presents a general formulation for ob- taining a reduced-order model by using selective modal analysis. A reduction example with one and another with three relevant modes are shown. By using eigenvalue sensitivity with respect to a positive bus power injection (negative load), the impact of wind turbine generators (WTGs) on power system operation is analyzed. Lastly, electricity market

Hector A. Pulgar-Painemal; Matias Negrete-Pincetic

2011-01-01

185

Fully Coupled Dynamic Analysis of a Floating Wind Turbine System.  

National Technical Information Service (NTIS)

The use of wind power is in a period of rapid growth worldwide and wind energy systems have emerged as a promising technology for utilizing offshore wind resources for the large scale generation of electricity Drawing upon the maturity of wind turbine and...

J. E. Withee

2004-01-01

186

Advanced coal-fueled industrial cogeneration gas turbine system  

Microsoft Academic Search

The objective of the Solar\\/METC program is to prove the technical, economic, and environmental feasibility of coal-fired gas turbine for cogeneration applications through tests of a Centaur Type H engine system operated on coal fuel throughout the engine design operating range. This quarter, work was centered on design, fabrication, and testing of the combustor, cleanup, fuel specifications, and hot end

R. T. LeCren; L. H. Cowell; M. A. Galica; M. D. Stephenson; C. S. Wen

1990-01-01

187

Model-based diagnostics of gas turbine engine lubrication systems  

Microsoft Academic Search

The objective of the current research was to develop improved methodology for diagnosing anomalies and maintaining oil lubrication systems for gas turbine engines. The effort focused on the development of reasoning modules that utilize the existing, inexpensive sensors and are applicable to on-line monitoring within the full-authority digital engine controller (FADEC) of the engine. The target application is the Enhanced

Byington

1998-01-01

188

Wind-Induced Response Analysis of Wind Turbine System  

Microsoft Academic Search

In this paper, the dynamic response of wind turbine system under wind action is numerically investigated. First, the random Fourier spectrum and rotating Fourier spectrum are proposed in this paper. These dynamic excitation models are built by starting with the point of view of random function and combining the understanding of the physical mechanism of the random excitations. Then a

GuangLing He; Jie Li

2009-01-01

189

Actuation system for a gas turbine engine exhaust device  

Microsoft Academic Search

A gas turbine engine actuation system for simultaneously controlling the flow areas defined by two generally coannular ducts, each duct terminating in a nozzle of the variable flap variety, is described. A bell crank pivotable about an axis on the outer (secondary) nozzle is link-connected to the inner (primary) nozzle and also to a translatable actuation ring. The geometry of

D. P. McHugh; D. F. Cook

1977-01-01

190

Filling system for investment cast Ni-base turbine blades  

Microsoft Academic Search

In investment foundries, it is usual to pay relatively little attention to the design of the filling system of a casting. Vacuum-cast turbine blades represent a typical case, where the mould filling process is poorly controlled, the mould cavities themselves often being top-filled. The consequential surface turbulence causes the entrapment of oxide film on the liquid surface, despite the use

D. Z Li; J Campbell; Y. Y Li

2004-01-01

191

Wind pattern recognition in neural fuzzy wind turbine control system  

Microsoft Academic Search

This paper introduces a new approach utilizing a fuzzy classifier and a modular temporal neural network to predict wind speed and direction for advanced wind turbine control systems. The fuzzy classifier estimates wind patterns and then assigns weights accordingly to each module of the temporal neural network. The finite-duration impulse response multiple-layer structure of the temporal network makes it possible

Guangdian G. Wu; Zhijie Dou

1994-01-01

192

Turbine Engine Monitoring System (TEMS) Long Term Support Infrastructure.  

National Technical Information Service (NTIS)

Under this contract, initiatives were conducted to improve the sustainment of the Turbine Engine Monitoring System (TEMS). TEMS is deployed on the A-10 and KC-135 aircraft to monitor engine parameters and provide alerts to the ground crew upon the occurre...

M. Nolan G. Giordano A. Esser G. deMare

2005-01-01

193

Slag processing system for direct coal-fired gas turbines  

Microsoft Academic Search

This patent describes an improvement in a direct coal-fired gas turbine system of the type having a primary combustion zone for burning coal in the presence of compressed air to product hot combustion gases and debris, such as molten slag, and a secondary combustion zone for the lean combustion of the hot combustion gases. The secondary combustion zone is coupled

Pillsbury

1990-01-01

194

Optimal scheduling of power systems with pumped hydropower storage plants adopting nonlinear programming techniques  

Microsoft Academic Search

The paper is concerned with the economic operation of power systems comprising pumped storage and thermal plants. In power systems, pumped storage plants may receive the energy required for pumping water either from the system in which they are integrated or from a neighbouring system. Therefore, two mathematical formulations of the problem are presented depending on the source of energy

M. Z. Ghoneim; Z. Ghoneim; M. F. Zaghloul

1980-01-01

195

Movable combustion system for a gas turbine  

SciTech Connect

This patent describes a combustor assembly for a gas turbine. It comprises a combustor having an outer liner disposed about an axis and a cover adjacent one end of the outer liner, a centerbody carried by the cover and carrying an inner liner about the axis and inside of and radially spaced from the outer liner; means carried by the assembly for supplying fuel within the combustor; means for supplying air within the combustor; means forming a venturi adjacent an opposite end of the outer liner, and including a portion of the centerbody defining a gap forming part of the venturi; and means external to the combustor and connected to the centerbody for moving the centerbody in an axial direction for adjusting the size of the-venturi gap.

Ford, J.E.; Myers, A.

1992-06-30

196

Gas turbine engine compartment vent system  

SciTech Connect

This paper describes improvement in a gas turbine engine of the type having a core engine, a shroud surrounding the core engine, a tubular outer nacelle defining an annular bypass duct therebetween and a fan disposed in the nacelle inlet for directing compressed air flow into and through the bypass duct, the shroud spaced from the engine sufficiently to provide space for installation of heat sensitive engine related components. The improvement comprises: at least one vent through the shroud, selectively positioned to direct compressed fan air from the bypass duct into the space between the shroud and engine for direct impingement on at least one of the heat sensitive engine related components for cooling same; the vent comprising an open ended tube extending through a hole in the shroud, bonded thereto, and terminating therein adjacent to the heat sensitive engine related components.

Mutch, H.

1991-10-08

197

Synchronous machine-turbine drive system with indirect speed control  

Microsoft Academic Search

Dynamic properties of a hybrid system are analyzed that has been developed to generate electric energy by utilizing alternative, renewable and waste energies. The solution is based on a system that consists of a high-speed turbine, coupled to a three-phase permanent magnet synchronous generator, an AC\\/AC converter and a supervisory control unit. The function of the system is to utilize

R. K. Jardan; I. Nagy

2003-01-01

198

A decision support system for real-time hydropower scheduling in a competitive power market environment  

Microsoft Academic Search

The electricity supply market is rapidly changing from a monopolistic to a competitive environment. Being able to operate their system of reservoirs and generating facilities to get maximum benefits out of existing assets and resources is important to the British Columbia Hydro Authority (B.C. Hydro). A decision support system has been developed to help B.C. Hydro operate their system in

Ziad Khaled Elias Shawwash

2000-01-01

199

University Turbine Systems Research Program Summary and Directory. September 1992-June 2003.  

National Technical Information Service (NTIS)

The South Carolina Institute for Energy Studies (SCIES), administratively housed at Clemson University, has participated in the advancement of combustion turbine technology for over a decade. The University Turbine Systems Research Program, previously ref...

L. P. Golan R. A. Wenglarz

2004-01-01

200

Advanced coal-fueled gas turbine systems reference system definition update  

SciTech Connect

The objective of the the Direct Coal-Fueled 80 MW Combustion Turbine Program is to establish the technology required for private sector use of an advanced coal-fueled combustion turbine power system. Under this program the technology for a direct coal-fueled 80 MW combustion turbine is to be developed. This unit would be an element in a 207 MW direct coal-fueled combustion turbine combined cycle which includes two combustion turbines, two heat recovery steam generators and a steam turbine. Key to meeting the program objectives is the development of a successful high pressure slagging combustor that burns coal, while removing sulfur, particulates, and corrosive alkali matter from the combustion products. Westinghouse and Textron (formerly AVCO Research Laboratory/Textron) have designed and fabricated a subscale slagging combustor. This slagging combustor, under test since September 1988, has been yielding important experimental data, while having undergone several design iterations.

Not Available

1991-09-01

201

Materials and Component Development for Advanced Turbine Systems  

SciTech Connect

In order to meet the 2010-2020 DOE Fossil Energy goals for Advanced Power Systems, future oxy-fuel and hydrogen-fired turbines will need to be operated at higher temperatures for extended periods of time, in environments that contain substantially higher moisture concentrations in comparison to current commercial natural gas-fired turbines. Development of modified or advanced material systems, combined with aerothermal concepts are currently being addressed in order to achieve successful operation of these land-based engines. To support the advanced turbine technology development, the National Energy Technology Laboratory (NETL) has initiated a research program effort in collaboration with the University of Pittsburgh (UPitt), and West Virginia University (WVU), working in conjunction with commercial material and coating suppliers as Howmet International and Coatings for Industry (CFI), and test facilities as Westinghouse Plasma Corporation (WPC) and Praxair, to develop advanced material and aerothermal technologies for use in future oxy-fuel and hydrogen-fired turbine applications. Our program efforts and recent results are presented.

Alvin, M.A.; Pettit, F.; Meier, G.; Yanar, N.; Chyu, M.; Mazzotta, D.; Slaughter, W.; Karaivanov, V.; Kang, B.; Feng, C.; Chen, R.; Fu, T-C.

2008-10-01

202

Hydropower Optimization for the Lower Seyhan System in Turkey using Dynamic Programming  

Microsoft Academic Search

Dynamic programming with successive approximation has been used in the past for optimizing multi-reservoir water resources systems. In this study, the State Incremental Dynamic Programming (SIDP) model is developed for energy optimization of multi-reservoir systems. A random file access method is used for reaching initial and intermediate data to cope with the curse of dimensionality of dynamic programming. A conventional

Recep Yurtal; Galip Seckin; GaliMehmet Ardiclioglu

2005-01-01

203

Hydropower Optimization for the Lower Seyhan Basin System in Turkey using dynamic programming  

Microsoft Academic Search

Dynamic programming with successive approximation has been used in the past for optimizing multi-reservoir water resources systems. In this study, a State Incremental Dynamic Programming (SIDP) model is developed for energy optimization of multi-reservoir systems. A random file access method is used to generate initial and intermediate data and cope with the curse of dimensionality of dynamic programming. The conventional

Recep Yurtal; Galip Seckin; Mehmet Ardiclioglu

2006-01-01

204

A decision support system for real-time hydropower scheduling in a competitive power market environment  

NASA Astrophysics Data System (ADS)

The electricity supply market is rapidly changing from a monopolistic to a competitive environment. Being able to operate their system of reservoirs and generating facilities to get maximum benefits out of existing assets and resources is important to the British Columbia Hydro Authority (B.C. Hydro). A decision support system has been developed to help B.C. Hydro operate their system in an optimal way. The system is operational and is one of the tools that are currently used by the B.C. Hydro system operations engineers to determine optimal schedules that meet the hourly domestic load and also maximize the value B.C. Hydro obtains from spot transactions in the Western U.S. and Alberta electricity markets. This dissertation describes the development and implementation of the decision support system in production mode. The decision support system consists of six components: the input data preparation routines, the graphical user interface (GUI), the communication protocols, the hydraulic simulation model, the optimization model, and the results display software. A major part of this work involved the development and implementation of a practical and detailed large-scale optimization model that determines the optimal tradeoff between the long-term value of water and the returns from spot trading transactions in real-time operations. The postmortem-testing phase showed that the gains in value from using the model accounted for 0.25% to 1.0% of the revenues obtained. The financial returns from using the decision support system greatly outweigh the costs of building it. Other benefits are the savings in the time needed to prepare the generation and trading schedules. The system operations engineers now can use the time saved to focus on other important aspects of their job. The operators are currently experimenting with the system in production mode, and are gradually gaining confidence that the advice it provides is accurate, reliable and sensible. The main lesson learned from developing and implementing the system was that there is no alternative to working very closely with the intended end-users of the system, and with the people who have deep knowledge, experience and understanding of how the system is and should be operated.

Shawwash, Ziad Khaled Elias

2000-10-01

205

Small Hydropower Technology Transfer Project.  

National Technical Information Service (NTIS)

Since its inception in 1977, the National Small Hydropower Program has supported investigations of 253 small scale hydropower projects and implementation of 20. The first draft of the summary document covering feasibility studies has been completed and th...

C. Cunningham J. Christensen A. R. Engebretsen G. Sommers

1983-01-01

206

Mixed integer programming approach to optimal short-term unit commitment for hydropower systems  

Microsoft Academic Search

Unit commitment problem is a complex decision-making process which involves the scheduling of generators over a set of time\\u000a periods to satisfy system load demand, water demand, system reliability, operational, and security constraints. Mathematically,\\u000a this is a nonlinear, nonconvex, high dimensional, and large-scale optimization problem over mixed integer variables. Additionally,\\u000a for a short-term unit commitment problem such as hourly or

Jaeeung Yi

1998-01-01

207

Using Conventional Hydropower to Help Alleviate Variable Resource Grid Integration Challenges in the Western U.S  

NASA Astrophysics Data System (ADS)

Integrating high penetration levels of wind and solar energy resources into the power grid is a formidable challenge in virtually all interconnected systems due to the fact that supply and demand must remain in balance at all times. Since large scale electricity storage is currently not economically viable, generation must exactly match electricity demand plus energy losses in the system as time unfolds. Therefore, as generation from variable resources such as wind and solar fluctuate, production from generating resources that are easier to control and dispatch need to compensate for these fluctuations while at the same time respond to both instantaneous change in load and follow daily load profiles. The grid in the Western U.S. is not exempt to grid integration challenges associated with variable resources. However, one advantage that the power system in the Western U.S. has over many other regional power systems is that its footprint contains an abundance of hydropower resources. Hydropower plants, especially those that have reservoir water storage, can physically change electricity production levels very quickly both via a dispatcher and through automatic generation control. Since hydropower response time is typically much faster than other dispatchable resources such as steam or gas turbines, it is well suited to alleviate variable resource grid integration issues. However, despite an abundance of hydropower resources and the current low penetration of variable resources in the Western U.S., problems have already surfaced. This spring in the Pacific Northwest, wetter than normal hydropower conditions in combination with transmission constraints resulted in controversial wind resource shedding. This action was taken since water spilling would have increased dissolved oxygen levels downstream of dams thereby significantly degrading fish habitats. The extent to which hydropower resources will be able to contribute toward a stable and reliable Western grid is currently being studied. Typically these studies consider the inherent flexibility of hydropower technologies, but tend to fall short on details regarding grid operations, institutional arrangements, and hydropower environmental regulations. This presentation will focus on an analysis that Argonne National Laboratory is conducting in collaboration with the Western Area Power Administration (Western). The analysis evaluates the extent to which Western's hydropower resources may help with grid integration challenges via a proposed Energy Imbalance Market. This market encompasses most of the Western Electricity Coordinating Council footprint. It changes grid operations such that the real-time dispatch would be, in part, based on a 5-minute electricity market. The analysis includes many factors such as site-specific environmental considerations at each of its hydropower facilities, long-term firm purchase agreements, and hydropower operating objectives and goals. Results of the analysis indicate that site-specific details significantly affect the ability of hydropower plant to respond to grid needs in a future which will have a high penetration of variable resources.

Veselka, T. D.; Poch, L.

2011-12-01

208

Wind Turbine Generator System Safety and Function Test Report for the Entegrity EW50 Wind Turbine.  

National Technical Information Service (NTIS)

This report summarizes the results of a safety and function test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator Syst...

A. Huskey D. Jager J. Hur J. Smith

2012-01-01

209

Advanced Turbine Systems Program, Conceptual Design and Product Development. Task 6, System definition and analysis.  

National Technical Information Service (NTIS)

The strategy of the ATS program is to develop a new baseline for industrial gas turbine systems for the 21st century, meeting the buying criteria of industrial gas turbine end users, and having growth potential. These criteria guided the Solar ATS Team in...

1995-01-01

210

Utilizing hydropower for load balancing non-storable renewable energy sources - technical and environmental challenges  

NASA Astrophysics Data System (ADS)

About 99% of the total energy production in Norway comes from hydropower, and the total production of about 120 TWh makes Norway Europe's largest hydropower producer. Most hydropower systems in Norway are based on high-head plants with mountain storage reservoirs and tunnels transporting water from the reservoirs to the power plants. In total, Norwegian reservoirs contributes around 50% of the total energy storage capacity in Europe. Current strategies to reduce emission of greenhouse gases from energy production involve increased focus on renewable energy sources, e.g. the European Union's 202020 goal in which renewable energy sources should be 20% of the total energy production by 2020. To meet this goal new renewable energy installations must be developed on a large scale in the coming years, and wind power is the main focus for new developments. Hydropower can contribute directly to increase renewable energy through new development or extensions to existing systems, but maybe even more important is the potential to use hydropower systems with storage for load balancing in a system with increased amount of non-storable renewable energies. Even if new storage technologies are under development, hydro storage is the only technology available on a large scale and the most economical feasible alternative. In this respect the Norwegian system has a high potential both through direct use of existing reservoirs and through an increased development of pump storage plants utilizing surplus wind energy to pump water and then producing during periods with low wind input. Through cables to Europe, Norwegian hydropower could also provide balance power for the North European market. Increased peaking and more variable operation of the current hydropower system will present a number of technical and environmental challenges that needs to be identified and mitigated. A more variable production will lead to fluctuating flow in receiving rivers and reservoirs, and it will also lead to more dynamic water temperatures and alter the interaction with the adjacent hyporheic zone. Frequent drying and wetting may impact the aquatic ecosystem e.g. through stranding of fish, and it may increase erosion and sediment transport in receiving reservoirs and rivers. During winter, most Norwegian systems currently adapt releases to prevent unstable ice conditions and ice runs and a more intermittent production schedule may lead to more unstable ice conditions. More transient flow may also have implications in the transfer tunnels and new methods are needed to monitor conditions to avoid turbine damage and loss of production. As a part of the Norwegian governments focus on developing renewable energy, a number of research centers for environmentally friendly energy production were created in 2009. For one of these centers, Center for environmentally design of renewable energy (CEDREN), one of the main objectives is to study the use of the Norwegian hydropower system for large scale peaking and load balancing, and to provide means of mitigating possible unwanted impacts. We will present data on how increased load balancing will influence the Norwegian hydropower system and an overview of challenges and possible solutions that the new operational strategy may incur.

Alfredsen, K. T.; Killingtveit, A.

2011-12-01

211

Is Hydropower an Endangered Species?  

Microsoft Academic Search

This article attempts to answer critical questions about hydropower in the context of federal and state struggles over jurisdiction, social values of fisheries, wildlife, and restoration vs development, and finally the burden of complex licensing\\/relicensing. What role has hydropower played in the development of the electric utility industry and has societies attitude toward costs and benefits of hydropower changed drastically?

Judith A. Johansen

1994-01-01

212

Turbine Blade Data Acquisition System User's Guide.  

National Technical Information Service (NTIS)

This report contains design and technical documentation on the noncontacting stress measurement system. This system acquires blade tip deflection data via noncontacting optical sensors. The system utilizes computer-based data acquisition and storage hardw...

M. J. Gutman

1989-01-01

213

The Research and Development Platform for Wind Energy System Used Induction Motor Replacing Wind Turbine  

Microsoft Academic Search

A research platform for wind energy system is developed in this paper. An inverter fed induction motor drive the wind generator replacing a real wind turbine. The power-speed characteristics of a wind turbine are physically implemented by an induction motor drive. For a given wind turbine characteristics, the shaft torque of induction motor is calculated by the given wind speed

Ming Qiao; Fei Lin; Ruixiang Hao; Xiaojie You; Trillion Q Zheng

2007-01-01

214

Design of a wind turbine pitch angle controller for power system stabilisation  

Microsoft Academic Search

The design of a PID pitch angle controller for a fixed speed active-stall wind turbine, using the root locus method is described in this paper. The purpose of this controller is to enable an active-stall wind turbine to perform power system stabilisation. For the purpose of controller design, the transfer function of the wind turbine is derived from the wind

Clemens Jauch; Syed M. Islam; Poul Sørensen; Birgitte Bak Jensen

2007-01-01

215

Performance of a 3 kW wind turbine generator with variable pitch control system  

Microsoft Academic Search

A prototype 3kW horizontal upwind type wind turbine generator of 4m in diameter has been designed and examined under real wind conditions. The machine was designed based on the concept that even small wind turbines should have a variable pitch control system just as large wind turbines, especially in Japan where typhoons occur at least once a year. A characteristic

Baku M. Nagai; Kazumasa Ameku; Jitendro Nath Roy

2009-01-01

216

General model for representing variable speed wind turbines in power system dynamics simulations  

Microsoft Academic Search

A tendency to erect ever more wind turbines can be observed in order to reduce the environmental consequences of electric power generation. As a result of this, in the near future, wind turbines may start to influence the behavior of electric power systems by interacting with conventional generation and loads. Therefore, wind turbine models that can be integrated into power

J. G. Slootweg; S. W. H. de Haan; H. Polinder; W. L. Kling

2003-01-01

217

Digital control system development for turbine control of nuclear power plant  

Microsoft Academic Search

Turbine control system (TCS) controls the speed of turbine and the load of generator. Its reliability directly affects the stability of turbine operation and the quality of electric power. In Korea, the nuclear power plant (NPP) have supplied fundamental portion of domestic electric energy consumption for over 20 years. Demands for retrofitting old TCSs have increased as time goes on

Jong-an Kim; Chang-ki Jung; Byung-chul Kim; In-Kyu Choi; Joo-hee Woo

2004-01-01

218

Knowledge-based system for preliminary aerodynamic design of aircraft engine turbines  

Microsoft Academic Search

The turbine design optimization system described here automates the turbine preliminary design process and stimulates designer interactions through the use of knowledge engineering. The turbine design optimization problem is an np-complete problem and needs to be solved iteratively. Automation of the design process permits search over a much larger domain than is possible for the human designer. In addition it

Sanjay Goel; Dave Cherry; Brent Gregory

1993-01-01

219

Advanced coal-fueled industrial cogeneration gas turbine system  

SciTech Connect

The objective of the Solar/METC program is to prove the technical, economic, and environmental feasibility of coal-fired gas turbine for cogeneration applications through tests of a Centaur Type H engine system operated on coal fuel throughout the engine design operating range. This quarter, work was centered on design, fabrication, and testing of the combustor, cleanup, fuel specifications, and hot end simulation rig. 2 refs., 59 figs., 29 tabs.

LeCren, R.T.; Cowell, L.H.; Galica, M.A.; Stephenson, M.D.; Wen, C.S.

1990-07-01

220

Analysis of Some Exergoeconomic Parameters of Small Wind Turbine System  

Microsoft Academic Search

This paper investigates some exergoeconomic parameters (energy and exergy loss ratios) for a 1.5 kW wind turbine system, linking capital costs and thermodynamic losses, based on some operating conditions. The results show that while the ratio of energy loss rate to capital cost (Ren) changes between 0.007 and 0.813 at different wind speeds, the ratio of exergy loss rate to

Onder Ozgener; Leyla Ozgener; Ibrahim Dincer

2009-01-01

221

Doubly fed induction generator systems for wind turbines  

Microsoft Academic Search

This article shows that adjustable speed generators for wind turbines are necessary when output power becomes higher than 1 MW. The doubly fed induction generator (DFIG) system presented in this article offers many advantages to reduce cost and has the potential to be built economically at power levels above 1.5 MW, e.g., for off-shore applications. A dynamic model of the

S. Muller; M. Deicke; R. W. De Doncker

2002-01-01

222

Boiler-turbine control system design using a genetic algorithm  

Microsoft Academic Search

This paper discusses the application of a genetic algorithm to control system design for boiler-turbine plant. In particular we study the ability of the genetic algorithm to develop a proportional-integral (PI) controller and a state feedback controller for a nonlinear multi-input\\/multi-output (MIMO) plant model. The plant model is presented along with a discussion of the inherent difficulties in such controller

Robert Dimeo; Kwang Y. Lee

1995-01-01

223

Gas fired advanced turbine system. Phase 1, System scoping and feasibility studies  

SciTech Connect

The basic concept thus derived from the Ericsson cycle is an intercooled, recuperated, and reheated gas turbine. Theoretical performance analyses, however, showed that reheat at high turbine rotor inlet temperatures (TRIT) did not provide significant efficiency gains and that the 50 percent efficiency goal could be met without reheat. Based upon these findings, the engine concept adopted as a starting point for the gas-fired advanced turbine system is an intercooled, recuperated (ICR) gas turbine. It was found that, at inlet temperatures greater than 2450{degrees}F, the thermal efficiency could be maintained above 50%, provided that the turbine cooling flows could be reduced to 7% of the main air flow or lower. This dual and conflicting requirement of increased temperatures and reduced cooling will probably force the abandonment of traditional air cooled turbine parts. Thus, the use of either ceramic materials or non-air cooling fluids has to be considered for the turbine nozzle guide vanes and turbine blades. The use of ceramic components for the proposed engine system is generally preferred because of the potential growth to higher temperatures that is available with such materials.

LeCren, R.T.; White, D.J.

1993-11-01

224

Advanced coal-fueled industrial cogeneration gas turbine system particle removal system development  

Microsoft Academic Search

Solar Turbines developed a direct coal-fueled turbine system (DCFT) and tested each component in subscale facilities and the combustion system was tested at full-scale. The combustion system was comprised of a two-stage slagging combustor with an impact separator between the two combustors. Greater than 90 percent of the native ash in the coal was removed as liquid slag with this

1994-01-01

225

Developing hydropower overseas  

SciTech Connect

This article examines how the National Hydropower Association (NHA) has found ways to support its members who desire to expand their business programs to foreign markets through participation in a wide range of government programs. The topics of the article include the market in developing countries, the certificate of review, products and services, and domestic and international competition.

Smith, W.B. (Benham-Holway Power Group, Tulsa, OK (United States))

1991-10-01

226

DOE Small Hydropower Program.  

National Technical Information Service (NTIS)

The scope of work and activities of the Department of Energy's National Small Hydropower Program are discussed. Each portion of the program is discussed to provide an overall view of the program's depth. The three major subprograms are the Demonstration P...

W. W. Hickman T. B. McLaughlin

1980-01-01

227

DOE Small Hydropower Program  

Microsoft Academic Search

The scope of work and activities of the Department of Energy's National Small Hydropower Program are discussed. Each portion of the program is discussed to provide an overall view of the program's depth. The three major subprograms are the Demonstration Projects subprogram, the Engineering Development subprogram, and the Loan subprogram. Program results are presented by graphic illustrations where applicable.

W. W. Hickman; T. B. McLaughlin

1980-01-01

228

Clean Energy: Hydropower  

NSDL National Science Digital Library

Hydropower generation is introduced to students as a common purpose and benefit of constructing dams. Through an introduction to kinetic and potential energy, students come to understand how a dam creates electricity. They also learn the difference between renewable and non-renewable energy.

Integrated Teaching And Learning Program

229

Hydropower in the balance  

SciTech Connect

After three months of the Clinton/Gore administration, the effect the new government will likely have on the hydropower industry is coming into focus. The administrations developing stance is raising concerns in the industry that more regulatory burdens may be ahead.

Lagassa, G. (Mainstream Associates, North Hampton, NH (United States))

1993-04-01

230

Recent DOE-sponsored hydropower engineering research  

SciTech Connect

Purpose of this paper is to provide an overview of DOE Engineering Development research activity since Waterpower 1981. General results of about 11 projects that have been completed since Waterpower 1981 are presented and compared. Continuing efforts are also described briefly. DOE has sponsored four projects dealing with the use of pumps as turbines. This approach results in capital cost savings, shorter time for completing a hydropower plant, wider variety of off-the-shelf equipment available, and better maintenance services. Results are summarized for feasibility studies, laboratory tests, and in-the-field experience surveys of the use of pumps as turbines. Other projects discussed include microhydropower plants (less than 100 kW in capacity), head augmentation devices, Schneider engines, the use of marine thrusters as turbines, low cost cross-flow turbines made of plastic, variable speed constant frequency generators, hydraulic air compressors, scroll motor turbines and modular float-in powerhouses. The paper also discusses some of the technologies where future research may prove fruitful.

Chappell, J.R.

1983-01-01

231

Advanced Gas Turbine (AGT) powertrain system initial development report  

NASA Astrophysics Data System (ADS)

The powertrain consists of a single shaft regenerated gas turbine engine utilizing ceramic hot section components, coupled to a slit differential gearbox with an available variable stator torque converter and an available Ford intergral overdrive four-speed automatic transmission. Predicted fuel economy using gasoline fuel over the combined federal driving cycle (CFDC) is 15.3 km/1, which represents a 59% improvement over the spark-ignition-powered baseline vehicle. Using DF2 fuel, CFDC mileage estimates are 17.43 km/1. Zero to 96.6 km/hr acceleration time is 11.9 seconds with a four-second accleration distance of 21.0 m. The ceramic radial turbine rotor is discussed along with the control system for the powertrain.

1980-08-01

232

Hydrogen turbine power conversion system assessment  

Microsoft Academic Search

A three part technical study was conducted whereby parametric technical and economic feasibility data were developed on several power conversion systems suitable for the generation of central station electric power through the combustion of hydrogen and the use of the resulting heat energy in turbogenerator equipment. The study assessed potential applications of hydrogen-fueled power conversion systems and identified the three

D. E. Wright; A. D. Lucci; J. Campbell; J. C. Lee

1978-01-01

233

Fuel Cell\\/Gas Turbine Hybrid Systems  

Microsoft Academic Search

The National Fuel Cell Research Center (NFCRC) was established to accelerate the evolution of fuel cells and fuel cell systems. In addition to addressing the key research challenges in the emergence of fuel cells, the Center assists the market to understand this unusual power system and the opportunities for both central and distributed generation. An intriguing fuel cell research initiative

Scott Samuelsen

234

Development of an aeroderivative gas turbine DLE combustion system  

SciTech Connect

GE embarked on the detailed design of a new gas-fired, premixed combustion system for its family of aeroderivative gas turbines. This new lean premixed system, sometimes referred to as a dry low-NO[sub x], or a dry low-emissions combustion system, will reduce the emissions of NO[sub x] to less than 25 ppm. The emissions of other pollutants, such as CO, unburned hydrocarbons (UHC), and particulates are also expected to be extremely low. The effects of engine operating conditions and combustor film cooling on emissions and lean flame stability were also studied in some detail. 4 figs.

Leonard, G.; Stegmaier, J. (GE Aircraft Engine Business, Cincinnati, OH (United States))

1993-05-01

235

Boiler-turbine control system design using a genetic algorithm  

SciTech Connect

This paper discusses the application of a genetic algorithm to control system design for a boiler-turbine plant. In particular the authors study the ability of the genetic algorithm to develop a proportional-integral (PI) controller and a state feedback controller for a non-linear multi-input/multi-output (MIMO) plant model. The plant model is presented along with a discussion of the inherent difficulties in such controller development. A sketch of the genetic algorithm (GA) is presented and its strategy as a method of control system design is discussed. Results are presented for two different control systems that have been designed with the genetic algorithm.

Dimeo, R.; Lee, K.Y. [Pennsylvania State Univ., University Park, PA (United States). Dept. of Electrical Engineering

1995-12-01

236

Operation of small wind turbines on a distribution system  

NASA Astrophysics Data System (ADS)

This study analyzed technical interconnection problems associated with the dispersed wind turbine WT application scenario: WTs connected on distribution systems producing ac power directly or dc power fed into an inverter, without storage systems, feeding back surplus power whenever the wind is blowing. Its specific objectives included analysis of: utility personnel safety; distribution system and WT protection equipment; WTs' effects on distribution feeder voltage and regulation equipment, and line losses; and development of a method to analyze utility load-frequency control problems with load patterns produced by customer demand and the WTs' intermittent power output.

Curtice, D.; Patton, J.

1981-03-01

237

Surface profiling system: Optimized for inspection of turbine blades  

NASA Astrophysics Data System (ADS)

A system is being designed for the inspection of turbine blades. This report describes progress made with the hardware and software for the system. The complete surface profiling system consists of a base plate which rigidly holds the components together, the laser projector, a four-axis mapping stage (X, Y, Z, and Theta) with three of the four axes motorized, a white-light illuminator which is used to illuminate the target for grey-scale video imaging (i.e. for focusing the video camera), a CCD video camera, and a host computer.

238

Hydrogen Turbine Power Conversion System Assessment.  

National Technical Information Service (NTIS)

A three part technical study was conducted whereby parametric technical and economic feasibility data were developed on several power conversion systems suitable for the generation of central station electric power through the combustion of hydrogen and t...

D. E. Wright A. D. Lucci J. Campbell J. C. Lee

1978-01-01

239

Reliability assurance of turbine energy conversion systems  

Microsoft Academic Search

The Dynamic Isotope Power System (DIPS) is a 6-k (electric) space power system utilizing a ²³⁸Pu radioisotope heat source and a dual redundant closed Brayton cycle power conversion assembly. The DIPS program is currently funded to design, fabricate, and test a ground demonstration engineering unit. Primary objectives of the test will be to validate design and demonstrate performance and lifetime.

P. D. Rutherford; D. S. Burgess; S. Robb

1989-01-01

240

Advanced Turbine Systems Program: Conceptual design and product development. Quarterly status report, May--July 1994  

SciTech Connect

The goal of the overall Advanced Turbine Systems (ATS) program is to develop and commercialize ultrahigh-efficiency gas-turbine-based power systems for utility and industrial applications. This contract will complete conceptual design and begin component testing for a utility-scale power system having 60% efficiency. Progress reports are presented for the following tasks: selection of natural gas-fired advance turbine systems (GFATS); selection of coal-fired advanced turbine systems (CFATS); market study; system definition and analysis; and design and test of critical components.

Not Available

1994-09-14

241

Advanced coal-fueled gas turbine systems  

NASA Astrophysics Data System (ADS)

No combustion tests for this program were conducted during this reporting period of January 1 to March 31, 1992. DOE-sponsored slogging combustor tests have been suspended since December 1991 in order to perform combustion tests on Northern States Power Company (NSP) coals. The NSP coal tests were conducted to evaluate combustor performance when burning western sub bituminous coals. The results of these tests will guide commercialization efforts, which are being promoted by NSP, Westinghouse Electric, and Textron Defense Systems. The NSP testing has been completed and preparation of the final report for that effort is underway. Although the NSP testing program has been completed, the Westinghouse/DOE program will not be resumed immediately. The reason for this is that Textron Defense Systems (TDS) has embarked on an internally funded program requiring installation of a new liquid fuel combustor system at the Haverhill site. The facility modifications for this new system are significant and it is not possible to continue the Westinghouse/DOE testing while these modifications are being made. These facility modifications are being performed during the period February 15, 1992 through May 31, 1992. The Westinghouse/DOE program can be resumed upon completion of this work.

1992-04-01

242

Multi-Megawatt Gas Turbine Power Systems for Lunar Colonies  

NASA Astrophysics Data System (ADS)

A concept for development of second generation 10 MWe prototype lunar power plant utilizing a gas cooled fission reactor supplying heated helium working fluid to two parallel 5 MWe closed cycle gas turbines is presented. Such a power system is expected to supply the energy needs for an initial lunar colony with a crew of up to 50 persons engaged in mining and manufacturing activities. System performance and mass details were generated by an author developed code (BRMAPS). The proposed pilot power plant can be a model for future plants of the same capacity that could be tied to an evolutionary lunar power grid.

Juhasz, Albert J.

2006-12-01

243

An artificial neural network system for diagnosing gas turbine engine fuel faults  

SciTech Connect

The US Army Ordnance Center & School and Pacific Northwest Laboratories are developing a turbine engine diagnostic system for the M1A1 Abrams tank. This system employs Artificial Neural Network (AN) technology to perform diagnosis and prognosis of the tank`s AGT-1500 gas turbine engine. This paper describes the design and prototype development of the ANN component of the diagnostic system, which we refer to as ``TEDANN`` for Turbine Engine Diagnostic Artificial Neural Networks.

Illi, O.J. Jr. [Army Ordnance Center and School, Aberdeen Proving Ground, MD (United States). Knowledge Engineering Group (KEG); Greitzer, F.L.; Kangas, L.J. [Pacific Northwest Lab., Richland, WA (United States); Reeve, T. [Expert Solutions, Stratford, CT (United States)

1994-04-01

244

Sliding mode\\/H? control of a hydro-power plant  

Microsoft Academic Search

This paper presents a new approach to Load Frequency Control (LFC) for a hydro-power plant. The control algorithm combines sliding mode control with H1 technique. The dynamic model of an entire hydro-power plant has been de- veloped. The sliding hyperplane is constructed by H1 full state feedback control method. The ideal lossless turbine-penstock model is used in this paper to

Xibei Ding; Alok Sinha

2011-01-01

245

RENOVATION OF TURBINE CONTROL SYSTEM USING PLC-BASED FOR SMALL HYDROELECTRIC POWER GENERATION  

Microsoft Academic Search

This paper presents the development of PLC-based turbine control system for small hydroelectric power generation with Kaplan turbine type. The proposed system is a pilot project of modernization of power plant control system prepared for supplantation of worn electronic equipment or analog technology. The proposed system is implemented for Mae-Ngat hydro- power plant, under responsibility of the Electricity Generating Authority

Tanabodee Duangsoithong; Chanapan Kongnam

246

Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine  

Microsoft Academic Search

This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of this

A. Huskey; J. van Dam

2010-01-01

247

Wind Turbine Generator System Duration Test Report for the Mariah Power Windspire Wind Turbine  

Microsoft Academic Search

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of the first round of this project. Duration testing is

A. Huskey; A. Bowen; D. Jager

2010-01-01

248

Wind Turbine Generator System Duration Test Report for the ARE 442 Wind Turbine  

Microsoft Academic Search

This test is being conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines are being tested at the NWTC as a part of this project. Duration testing is one of up

J. van Dam; D. Baker; D. Jager

2010-01-01

249

Automated controlling system for protection of hydroelectrical power station with butterfly valves on power channel  

Microsoft Academic Search

Each hydro-power station is equipped with a protection system, that intervenes in the case of a breakdown of the equipments, to protect the personnel and the aggregates of the power plant. One of the base components of a hydro-power station is the forced pipeline, which allows admission of water from the reservoir to the turbine-generator groups. For the protection of

Gicu Ungureanu; Maria Mircea; Cristian Vigu; Dan Gota

2010-01-01

250

Analysis methods for wind turbine control and electrical system dynamics  

NASA Astrophysics Data System (ADS)

The integration of new energy technologies into electric power systems requires methods which recognize the full range of dynamic events in both the new generating unit and the power system. Since new energy technologies are initially perceived as small contributors to large systems, little attention is generally paid to system integration, i.e. dynamic events in the power system are ignored. As a result, most new energy sources are only capable of base-load operation, i.e. they have no load following or cycling capability. Wind turbines are no exception. Greater awareness of this implicit (and often unnecessary) limitation is needed. Analysis methods are recommended which include very low penetration (infinite bus) as well as very high penetration (stand-alone) scenarios.

Hinrichsen, E. N.

1995-05-01

251

Shaken, not stirred: The recipe for a fish-friendly turbine  

SciTech Connect

It is generally agreed that injuries and mortalities among turbine-passed fish can result from several mechanisms, including rapid and extreme water pressure changes, cavitation, shear, turbulence, and mechanical injuries (strike and grinding). Advances in the instrumentation available for monitoring hydraulic conditions and Computational Fluid Dynamics (CFD) techniques now make it possible both to estimate accurately the levels of these potential injury mechanisms in operating turbines and to predict the levels in new turbine designs. This knowledge can be used to {open_quotes}design-out{close_quotes} the most significant injury mechanisms in the next generation of turbines. However, further improvements in turbine design are limited by a poor understanding of the levels of mechanical and hydraulic stresses that can be tolerated by turbine-passed fish. The turbine designers need numbers (biological criteria) that define a safety zone for fish within which pressures, shear forces, cavitation, and chance of mechanical strike are all at acceptable levels for survival. This paper presents the results of a literature review of fish responses to the types of biological stresses associated with turbine passage, as studied separately under controlled conditions in the laboratory rather than in combination at field sites. Some of the controlled laboratory and field studies reviewed here were bioassays carried out for reasons unrelated to hydropower production. Analysis of this literature was used to develop provisional biological criteria for hydroelectric turbine designers. These biological criteria have been utilized in the U.S. Department of Energy`s Advanced Hydropower Turbine System (AHTS) Program to evaluate the results of conceptual engineering designs and the potential value of future turbine models and prototypes.

Cada, G.F.

1997-03-01

252

Development of a digital turbine control system in a nuclear power plant  

Microsoft Academic Search

A digital turbine control system (TCS) has been developed for retrofitting an old analog TCS in a nuclear power plant. The\\u000a developed TCS, which controls the speed of a turbine and the power load of a generator, is based on a triple modular redundant\\u000a structure to ensure the system reliability. In addition, a turbine simulator has been developed to verify

In-Kyu Choi; Jong-An Kim; Chang-Ki Jeong; Joo-Hee Woo; Ji-Young Choi; Gihun Son

2009-01-01

253

Advanced coal fueled industrial cogeneration gas turbine system. Final report, June 1986April 1994  

Microsoft Academic Search

Demonstration of a direct coal-fueled gas turbine system that is environmentally, technically, and economically viable depends on the satisfactory resolution of several key issues. Solar Turbines, Incorporates technical approach to these issues was to advance a complete direct coal-fueled gas turbine system that incorporated near-term technology solutions to both historically demonstrated problem areas such as deposition, erosion, and hot end

LeCren

1994-01-01

254

Modeling of Solid Oxide Fuel Cell\\/Gas Turbine Hybrid Systems  

Microsoft Academic Search

There is a growing interest in fuel cells for hybrid system. Fuel cells when combined with conventional turbine power plants offer high fuel efficiencies. The feature of certain fuel cells (SOFC, MCFC), which makes them suitable for hybrid systems, is their high operating temperature. In this work, a detailed thermodynamic model of SOFC\\/Gas turbine hybrid system is simulated in Matlab-Simulink.

Nischal Srivastava

2006-01-01

255

RTDS-based real time simulations of grid-connected wind turbine generator systems  

Microsoft Academic Search

This paper presents the modeling and analysis of grid-connected wind turbine systems using real time digital simulator (RTDS). The different modeled systems of wind turbine generator systems (WTGS) such as permanent magnet synchronous generator (PMSG), induction generator (IG), synchronous generator (SG) and doubly fed induction generator (DFIG) are simulated. Three control schemes for 3 MW WTGSs of squirrel cage induction

Gyeong-Hun Kim; Young-Ju Kim; In-Keun Yu; Byeong-Mun Song

2010-01-01

256

Advanced Materials for Mercury 50 Gas Turbine Combustion System  

SciTech Connect

Solar Turbines Incorporated (Solar), under cooperative agreement number DE-FC26-0CH11049, has conducted development activities to improve the durability of the Mercury 50 combustion system to 30,000 hours life and reduced life cycle costs. This project is part of Advanced Materials in the Advanced Industrial Gas Turbines program in DOE's Office of Distributed Energy. The targeted development engine was the Mercury{trademark} 50 gas turbine, which was developed by Solar under the DOE Advanced Turbine Systems program (DOE contract number DE-FC21-95MC31173). As a generator set, the Mercury 50 is used for distributed power and combined heat and power generation and is designed to achieve 38.5% electrical efficiency, reduced cost of electricity, and single digit emissions. The original program goal was 20,000 hours life, however, this goal was increased to be consistent with Solar's standard 30,000 hour time before overhaul for production engines. Through changes to the combustor design to incorporate effusion cooling in the Generation 3 Mercury 50 engine, which resulted in a drop in the combustor wall temperature, the current standard thermal barrier coated liner was predicted to have 18,000 hours life. With the addition of the advanced materials technology being evaluated under this program, the combustor life is predicted to be over 30,000 hours. The ultimate goal of the program was to demonstrate a fully integrated Mercury 50 combustion system, modified with advanced materials technologies, at a host site for a minimum of 4,000 hours. Solar was the Prime Contractor on the program team, which includes participation of other gas turbine manufacturers, various advanced material and coating suppliers, nationally recognized test laboratories, and multiple industrial end-user field demonstration sites. The program focused on a dual path development route to define an optimum mix of technologies for the Mercury 50 and future gas turbine products. For liner and injector development, multiple concepts including high thermal resistance thermal barrier coatings (TBC), oxide dispersion strengthened (ODS) alloys, continuous fiber ceramic composites (CFCC), and monolithic ceramics were evaluated before down-selection to the most promising candidate materials for field evaluation. Preliminary, component and sub-scale testing was conducted to determine material properties and demonstrate proof-of-concept. Full-scale rig and engine testing was used to validated engine performance prior to field evaluation at a Qualcomm Inc. cogeneration site located in San Diego, California. To ensure that the CFCC liners with the EBC proposed under this program would meet the target life, field evaluations of ceramic matrix composite liners in Centaur{reg_sign} 50 gas turbine engines, which had previously been conducted under the DOE sponsored Ceramic Stationary Gas Turbine program (DE-AC02-92CE40960), was continued under this program at commercial end-user sites under Program Subtask 1A - Extended CFCC Materials Durability Testing. The goal of these field demonstrations was to demonstrate significant component life, with milestones of 20,000 and 30,000 hours. Solar personnel monitor the condition of the liners at the field demonstration sites through periodic borescope inspections and emissions measurements. This program was highly successful at evaluating advanced materials and down-selecting promising solutions for use in gas turbine combustions systems. The addition of the advanced materials technology has enabled the predicted life of the Mercury 50 combustion system to reach 30,000 hours, which is Solar's typical time before overhaul for production engines. In particular, a 40 mil thick advanced Thermal Barrier Coating (TBC) system was selected over various other TBC systems, ODS liners and CFCC liners for the 4,000-hour field evaluation under the program. This advanced TBC is now production bill-of-material at various thicknesses up to 40 mils for all of Solar's advanced backside-cooled combustor liners (Centaur 50, Taurus 60, Mars 100, Taurus 70,

Price, Jeffrey

2008-09-30

257

Maintain top performance from gas-turbine-based systems  

SciTech Connect

Record-setting efficiencies and single-digit emissions have developers, regulators, and suppliers cheering, but the operations and maintenance (O and M) community shoulders the burden of delivering on the promises long-term. Making sure that combined cycles live up to lofty expectations can be particularly tough in a competitive climate. Advanced gas turbines (GTs) are on the cutting edge of materials science, and demand ever more intricate cooling schemes to protect turbine blades. Combustion systems that simultaneously achieve high efficiency and low emissions operate on the ragged bounds of flame stability, requiring state-of-the-art digital controls. And the integrated combined cycles (CC) powerplant has grown into a tangled web of multiple-pressure reheat steam systems, inlet-air cooling plants, water treatment facilities, air-cooled condensers, selective catalytic reduction systems, and so on. Hence, making sure that advanced CC powerplants live up to expectations--not only during acceptance testing but over a 20- to 30-yr service life--takes more than a developer`s feasibility study, a designer`s calculations, or a manufacturer`s warranty. It takes intelligent, long-term strategies in O and M--strategies that can keep pace with the advance of technology, as well as the emergence of competition.

Swanekamp, R.

1996-02-01

258

Design-Operation of Multi-Hydropower Reservoirs: HBMO Approach  

Microsoft Academic Search

To illustrate and test the applicability and performance of the innovative honey-bee mating optimization (HBMO) algorithm\\u000a in highly non-convex hydropower system design and operation, two problems are considered: single reservoir and multi-reservoir.\\u000a Both hydropower problems are formulated to minimize the total present net cost of the system, while achieving the maximum\\u000a possible ratio for generated power to installed capacity. The

Omid Bozorg Haddad; Abbas Afshar; Miguel A. Mariño

2008-01-01

259

Selection of the most advantageous gas turbine air filtration system: Comparative study of actual operating experience  

Microsoft Academic Search

This paper discusses relative merits of three types of air filtration systems used by Sui Northern Gas Pipelines Ltd. (Pakistan), on its gas turbine compressor packages. These Filtration systems are: (i) Two stage inertial plus auto oil bath type multi-duty filters by AAF used on Saturn Mark-1 packages manufactured by Solar Turbines Inc. (ii) Three stage high efficiency barrier filters

S. I. Gilani; M. Z. Mehr

1985-01-01

260

Optimization of micro-turbine generation control system using genetic algorithm  

Microsoft Academic Search

This paper presents a dynamic modeling and simulation of a high speed single shaft micro-turbine generation (MTG) system for grid connected operation and shows genetic algorithm (GA) role in improvement of control system operation. The model is developed with the consideration of the main parts including: compressor-turbine, permanent magnet (PM) generator, three phase bridge rectifier and inverter. The simulation results

S. M. Alizadeh; M. Sedighizadeh; D. Arzaghi-Haris

2010-01-01

261

Effect of grid-connected DFIG wind turbines on power system transient stability  

Microsoft Academic Search

In some power systems, the penetration of wind power is increasing rapidly and starts to influence the overall system behavior and stability. Under this condition, it becomes necessary to require wind turbine generators (WTGs) to remain in service during grid faults to support network voltage and frequency. This paper investigates the effect of grid-connected wind turbines driving doubly-fed induction generators

Wei Qiao; Ronald G. Harley

2008-01-01

262

Research on system modeling and control of turbine-driven centrifugal compressor  

Microsoft Academic Search

In this paper, the model of centrifugal compressor driven by turbine is built up. Comparing with the centrifugal compressor driven by motor which has the steady speed, system in this paper can be governed not only by anti-surge valve but also by speed of turbine. The purpose of this paper is system simulation and to design PID controller governing this

Le Wen; Lin Gao; Yiping Dai

2011-01-01

263

International comparison of requirements for connection of wind turbines to power systems  

Microsoft Academic Search

Power production from wind turbines has increased considerably during the last decade. Therefore today's wind turbines, which are typically set up in wind farms, have a significant influence on the operation of power systems. The efficient and secure operation of power systems is supported by grid codes, which are sets of requirements for all network users (suppliers, customers, etc.). In

Clemens Jauch; Julija Matevosyan; Thomas Ackermann; Sigrid Bolik

2005-01-01

264

An expert system concept for diagnosis and monitoring of gas turbine combustion chambers  

Microsoft Academic Search

In this paper, the main principles of operation, the conceptual design and the development of an expert system for fault diagnosis and monitoring of gas turbine combustion chambers are presented. The concept of the gas turbine chamber expert system is based on the monitoring of the spatial and temporal distribution of the heat flux inside the combustion chamber and the

N. H. Afgan; M. G. Carvalho; P. A. Pilavachi; A. Tourlidakis; G. G. Olkhonski; N. Martins

2006-01-01

265

Advanced turbine systems sensors and controls needs assessment study. Final report  

Microsoft Academic Search

The Instrumentation and Controls Division of the Oak Ridge National Laboratory performed an assessment of the sensors and controls needs for land-based advanced gas turbines being designed as a part of the Department of Energy`s (DOE`s) Advanced Turbine Systems (ATS) Program for both utility and industrial applications. The assessment included visits to five turbine manufacturers. During these visits, in-depth discussions

R. L. Anderson; D. N. Fry; J. A. McEvers

1997-01-01

266

Small hydropower technology transfer project  

Microsoft Academic Search

Since its inception in 1977, the National Small Hydropower Program has supported investigations of 253 small scale hydropower projects and implementation of 20. The first draft of the summary document covering feasibility studies has been completed and the results of the analysis are summarized within this paper.

C. Cunningham; J. Christensen; A. R. Engebretsen; G. Sommers

1983-01-01

267

Remote Monitoring Life Management System for Gas Turbines  

NASA Astrophysics Data System (ADS)

The Life-Management System (LMS), for optimizing the reliability and maintenance costs of hot-gas-path components, was developed previously. Based on LMS, the Life-Management System with Remote Monitoring (LMSRM) for the real-time evaluation of damage and the residual life times of the hot-gas-path components of gas turbines was developed in the current work. Damage to these components is accurately evaluated by using a new equivalent operating time that takes data gathered by on-line sensors into account. The new equivalent operating time is thus calculated by using the number of start-ups/shut-downs, the number of variations in loading, and by such real-time data, as temperature, pressure, and composition of intake air.

Gotoh, Jin'ichiro; Hayasaka, Yasushi; Sakurai, Shigeo; Ikeda, Hiraku

268

EMD feature entropy based dynamic characteristic extraction of the draft tube of hydraulic turbines  

NASA Astrophysics Data System (ADS)

In this paper, the test data and storage management, data analysis and other aspects of the signal presented the turbine tube vibration system design ideas and methods. Describes a vibration analysis of tube effective method: Based on HHT spectrum of EMD turbine to extract the dynamic characteristics of information and software to be achieved. The results show that the method of high accuracy, and has a good feature vector extraction turbine capacity, suitable for analyzing complex and dynamic characteristics of turbine specific information; and the system has strong versatility and scalability, and achieve a good real-time performance. No. 1 in a hydropower station on the real machine test, experimental results show that the system can effectively monitor the vibration of the draft tube.

Xue, Y. G.; Luo, X. Q.; Wang, H.

2012-11-01

269

Uniform criteria for U.S. hydropower resource assessment: Hydropower Evaluation Software status report -- 2  

Microsoft Academic Search

The US Department of Energy is estimating the undeveloped hydropower potential in the US. The Hydropower Evaluation software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The Hydropower Evaluation Software estimates the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower

A. M. Conner; J. E. Francfort; B. N. Rinehart

1996-01-01

270

BIOMASS GASIFICATION AND POWER GENERATION USING ADVANCED GAS TURBINE SYSTEMS  

SciTech Connect

A multidisciplined team led by the United Technologies Research Center (UTRC) and consisting of Pratt & Whitney Power Systems (PWPS), the University of North Dakota Energy & Environmental Research Center (EERC), KraftWork Systems, Inc. (kWS), and the Connecticut Resource Recovery Authority (CRRA) has evaluated a variety of gasified biomass fuels, integrated into advanced gas turbine-based power systems. The team has concluded that a biomass integrated gasification combined-cycle (BIGCC) plant with an overall integrated system efficiency of 45% (HHV) at emission levels of less than half of New Source Performance Standards (NSPS) is technically and economically feasible. The higher process efficiency in itself reduces consumption of premium fuels currently used for power generation including those from foreign sources. In addition, the advanced gasification process can be used to generate fuels and chemicals, such as low-cost hydrogen and syngas for chemical synthesis, as well as baseload power. The conceptual design of the plant consists of an air-blown circulating fluidized-bed Advanced Transport Gasifier and a PWPS FT8 TwinPac{trademark} aeroderivative gas turbine operated in combined cycle to produce {approx}80 MWe. This system uses advanced technology commercial products in combination with components in advanced development or demonstration stages, thereby maximizing the opportunity for early implementation. The biofueled power system was found to have a levelized cost of electricity competitive with other new power system alternatives including larger scale natural gas combined cycles. The key elements are: (1) An Advanced Transport Gasifier (ATG) circulating fluid-bed gasifier having wide fuel flexibility and high gasification efficiency; (2) An FT8 TwinPac{trademark}-based combined cycle of approximately 80 MWe; (3) Sustainable biomass primary fuel source at low cost and potentially widespread availability-refuse-derived fuel (RDF); (4) An overall integrated system that exceeds the U.S. Department of Energy (DOE) goal of 40% (HHV) efficiency at emission levels well below the DOE suggested limits; and (5) An advanced biofueled power system whose levelized cost of electricity can be competitive with other new power system alternatives.

David Liscinsky

2002-10-20

271

Operations of small wind turbines on a distribution system  

NASA Astrophysics Data System (ADS)

The paper summarizes a study of the technical interconnection problems created by dispersed small wind turbines (WTs). Specific objectives included analysis of: utility personnel safety; distribution system and WT protection equipment; WTs' effects on distribution feeder voltage and regulation equipment, and line losses; and development of a method to analyze utility load-frequency control problems with load patterns produced by customer demand and the WTs' intermittent power output. Present utility safety procedures require a lock-out disconnect on synchronous generator and self-commutated inverter WTs, and is recommended on induction generator and line-commutated inverter WTs. Radial feeder overcurrent protection equipment coordination was not found to be significantly affected by small WTs. Relays sensing abnormal frequency and voltage are recommended for automatically disconnecting "islanded' WTs.

Curtice, D.; Patton, J.

272

After fogging process in water injected gas turbine systems  

NASA Astrophysics Data System (ADS)

In gas turbine system with after fogging, water droplets are injected after compressor. After fogging could have more significant potential for enhancement of specific power production compared to inlet fogging alone, since a larger water injection rate is possible. Transient analysis of after fogging process is carried out by using a heat and mass transfer modeling on water droplet evaporation. Transient variables such as droplet diameter and air temperature are evaluated as the droplet evaporation proceeds for different values of initial droplet diameter, pressure ratio of compressor, and water injection ratio. The evaporation time for injected droplets are also estimated. Present results show that the evaporation time decreases sensitively with increasing pressure ratio or initial droplet diameter. However, the effect of water injection ratio on evaporation time is relatively insignificant unless water injection ratio is near the critical ratio.

Kim, Kyoung Hoon; Kim, Dongjoo; Kim, Kyoungjin

2013-08-01

273

A hybrid generation system using variable speed wind turbines and diesel units  

Microsoft Academic Search

The paper presents a study of a power system consisting of wind turbines and diesel generation units. In the study, a direct drive modular permanent magnet generator is used for the wind turbine and a normal permanent magnet generator is used for the diesel generation unit. Both types of generation units are connected to the load via power electronic converters

Z. Chen; Y. Hu

2003-01-01

274

Justified Fault-Ride-Through Requirements for Wind Turbines in Power Systems  

Microsoft Academic Search

In this paper, a novel adaptive strategy to obtain tech- nically justified fault-ride-through requirements for wind turbines (WTs) is proposed. The main objective is to promote an effective integration of wind turbines into power systems with still low pen- etration levels of wind power based on technical and economical considerations. The level of requirement imposed by the strategy is increased

C. Rahmann; H.-J. Haubrich; A. Moser; R. Palma-Behnke; L. Vargas; M. B. C. Salles

2011-01-01

275

Experimental and analytical studies of lightning overvoltages in wind turbine generator systems  

Microsoft Academic Search

This paper presents the results of the experimental and analytical studies undertaken for the lightning protection of wind turbine generator systems by using a reduced-size wind turbine model. In the analytical studies, the FDTD (Finite Difference Time Domain) method is used. This study focuses on the overvoltages observed at the wavefronts of lightning surges. The lightning strokes on one of

K. Yamamoto; T. Noda; S. Yokoyama; A. Ametani

2009-01-01

276

A study of thermodynamic cycle and system configurations of hydrogen combustion turbines  

Microsoft Academic Search

A hydrogen combustion turbine is powered by steam generated from the internal combustion of hydrogen as a fuel mixed with stoichiometric oxygen. As it is possible to use a closed cycle system, benefits in cycle efficiency and a reduction of environmental pollution effects.Three different closed hydrogen combustion turbine cycles are evaluated. These are the Bottoming reheat cycle (A), the Topping

H. Sugisita; H. Mori; K. Uematsu

1998-01-01

277

Smoothing Output Power of a Doubly Fed Wind Turbine with an Energy Storage System  

Microsoft Academic Search

Wind energy sources are characterized by irregularity and unpredictability. In normal operation, random properties of wind and blade rotational turbulence can produce unwanted fluctuation on the voltage and power supplied into the system. Power output of a wind turbine is a function of wind speed. Wind turbine is a source of power fluctuations due to the nature of wind speed.

M. Aktarujjaman; M. A. Kashem; M. Negnevitsky; G. Ledwich

278

Modeling of Wind Turbine Driving Permanent Magnet Generator with Maximum Power Point Tracking System  

Microsoft Academic Search

This paper elaborates on the analysis and simulation of 15 kW Wind Turbine Generator (WTG) driving low speed Permanent Magnet Synchronous Generator (PMSG) using PSIM computer simulation program. The system consists of wind turbine, permanent magnet generator, three-phase diode rectifier, boost converter, and voltage source inverter models. In the WTG model, the best performance coefficient has been determined according to

Ali M. Eltamaly

2007-01-01

279

Optimal Maintenance Strategies for Wind Turbine Systems Under Stochastic Weather Conditions  

Microsoft Academic Search

We examine optimal repair strategies for wind turbines operated under stochastic weather conditions. In-situ sensors installed at wind turbines produce useful information about the physical conditions of the system, allowing wind farm operators to make informed decisions. Based on the information from sensors, our research objective is to derive an optimal preventive maintenance policy that minimizes the expected average cost

Eunshin Byon; Lewis Ntaimo; Yu Ding

2010-01-01

280

Development of a wind turbine simulator for wind energy conversion systems  

Microsoft Academic Search

A wind turbine simulator for wind energy conversion systems is developed with a view to design, evaluate and implement an actual wind turbine controller. The simulator consists of a 125 hp induction motor which drives a low speed generator and is driven by a 112 kW variable speed drive inverter, and real time control software

L. Chang; R. Doraiswami; T. Boutot; H. Kojabadi

2000-01-01

281

Fibre optic microsensor for measurement of temperature dynamics in gas turbine systems  

Microsoft Academic Search

The use of computational fluid dynamics (CFD) to model the temperature and pressure distributions which drive complex thermodynamic processes in gas turbine systems contributes to more cost efficient turbine design and development. However, experimental measurements are still required for validation of full-field CFD models, particularly in regions of highly unsteady flow where model stability is most severely tested. THis work

James M. Kilpatrick; William N. MacPherson; James S. Barton; Julian D. Jones; D. R. Buttsworth; T. V. Jones; Kamaljit S. Chana; J. S. Anderson

1998-01-01

282

Turbine drive system of the high pressure LOX turbopump test facility  

Microsoft Academic Search

This paper describes the turbine drive system of facilities such as a gas generator among high pressure liquid oxygen (LOX) turbopump test facilities, which were constructed for the rating test of a high pressure LOX turbopump. In particular, the control sequence of the high pressure gaseous hydrogen\\/liquid oxygen gas generator and the turbine exhaust gas disposal unit for high pressures

Y. Watanabe; S. Hasegawa; K. Kamijo; R. Hashimoto; Y. Sakamoto; S. Tone

1991-01-01

283

Operating experience feedback report -- turbine-generator overspeed protection systems: Commercial power reactors. Volume 11  

Microsoft Academic Search

This report presents the results of the US Nuclear Regulatory Commission`s Office for Analysis and Evaluation of Operational Data (AEOD) review of operating experience of main turbine-generator overspeed and overspeed protection systems. It includes an indepth examination of the turbine overspeed event which occurred on November 9, 1991, at the Salem Unit 2 Nuclear Power Plant. It also provides information

Ornstein

1995-01-01

284

Hydropower Resource Assessment Modeling Results  

SciTech Connect

The U.S. Department of Energy?s Hydropower Program developed the Hydropower Evaluation Software to model the undeveloped hydropower resources in the United States based on environmental, legal, and institutional constraints. This Hydropower Resource Assessment effort has identified 5,677 sites that have an undeveloped total capacity of about 30,000 megawatts. The Hydropower Evaluation Software uses the Federal Energy Regulatory Commission?s Hydroelectric Power Resource Assessment database to identify sites with undeveloped hydropower capacity and the estimated megawatts of undeveloped capacity at each site. The software integrates this information with environmental values from the National Park Service?s National Rivers Inventory database. Other constraints to development that are modeled include Federal and state legislative protection for river segments that have been identified as being wild and scenic river segments. River segments containing threatened and/or endangered wildlife and fish are also modeled for their influence on hydropower development. The amount that each attribute affects the likelihood of development is dependent on the prior development of a site.

A. M. Conner; J. E. Francfort

1999-07-06

285

Hydropower Resource Assessment Modeling Results  

SciTech Connect

The U.S. Department of Energy's Hydropower Program developed the Hydropower Evaluation Software to model the undeveloped hydropower resources in the United States based on environmental, legal, and institutional constraints. This Hydropower Resource Assessment effort has identified 5,677 sites that have an undeveloped total capacity of about 30,000 megawatts. The Hydropower Evaluation Software uses the Federal Energy Regulatory Commission's Hydroelectric Power Resource Assessment database to identify sites with undeveloped hydropower capacity and the estimated megawatts of undeveloped capacity at each site. The software integrates this information with environmental values from the National Park Service's National Rivers Inventory database. Other constraints to development that are modeled include Federal and state legislative protection for river segments that have been identified as being wild and scenic river segments. River segments containing threatened and/or endangered wildlife and fish are also modeled for their influence on hydropower development. The amount that each attribute affects the likelihood of development is dependent on the prior development of a site.

Conner, Alison Marie; Francfort, James Edward

1999-07-01

286

Drive Turbine System for 20-Inch Turbofan Simulators. 2 Core Turbine Design.  

National Technical Information Service (NTIS)

Drive-turbines for a given set of 20-inch turbo-fan simulators are described. The simulators had both single-stage and two-stage fans that had design pressure ratios as low as 1.25 and as high as 3.0. The desired objective of the study was to be able to d...

W. J. Whitney

1972-01-01

287

LASER STABILIZATION FOR NEAR ZERO NOâ GAS TURBINE COMBUSTION SYSTEMS  

Microsoft Academic Search

Historically, the development of new industrial gas turbines has been primarily driven by the intent to achieve higher efficiency, lower operating costs and lower emissions. Higher efficiency and lower cost is obtained through higher turbine operating temperatures, while reduction in emissions is obtained by extending the lean operating limit of the combustor. However reduction in the lean stability limit of

Vivek Khanna

2002-01-01

288

Wind turbine test Nordtank NTK 500/37. System test.  

National Technical Information Service (NTIS)

The report describes measurements carried out on the Nordtank NTK 500/37 wind turbine during the period from September 1992 to September 1993. The measurements were carried out at Risoe located near Roskilde Fjord. The test site, the wind turbine, the dat...

S. Markkilde Petersen

1994-01-01

289

Design of advanced automatic inspection system for turbine blade FPI analysis  

NASA Astrophysics Data System (ADS)

Aircraft engine turbine blade is the most susceptible part to discontinuities as it works in the extremely high pressure and temperature. Among various types of NDT method, Fluorescent Penetrant Inspection (FPI) is comparably cheap and efficient thus suitable for detecting turbine blade surface discontinuities. In this paper, we have developed an Advanced Automatic Inspection System (AAIS) with Image Processing and Pattern Recognition techniques to aid human inspector. The system can automatically detect, measure and classify the discontinuities from turbine blade FPI images. The tests on the sample images provided by industrial partner have been performed to evaluate the system.

Zheng, J.; Xie, W. F.; Viens, M.; Birglen, L.; Mantegh, I.

2013-01-01

290

Knowledge-based system for preliminary aerodynamic design of aircraft engine turbines  

NASA Astrophysics Data System (ADS)

The turbine design optimization system described here automates the turbine preliminary design process and stimulates designer interactions through the use of knowledge engineering. The turbine design optimization problem is an np-complete problem and needs to be solved iteratively. Automation of the design process permits search over a much larger domain than is possible for the human designer. In addition it allows designers to look beyond the horizons of the present, limited design subtask so that they can work on new ideas and concepts, testing hypotheses by using the system to answer what-if questions. The optimization system allows the user to make tradeoffs between multiple design objectives.

Goel, Sanjay; Cherry, Dave; Gregory, Brent

1993-03-01

291

Advanced Turbine Systems (ATS): Phase 1 system scoping and feasibility studies.  

National Technical Information Service (NTIS)

As part of this involvement Solar intends to design and commercialize a unique gas turbine system that promises high cycle efficiencies and low exhaust emissions. This engine of approximately 12-MW will be targeted for the dispersed power markets both urb...

D. J. White

1993-01-01

292

Twisted Savonius turbine based marine current energy conversion system  

NASA Astrophysics Data System (ADS)

The Ocean Network Seafloor Instrumentation (ONSFI) Project is a multidisciplinary research and development project that aims to design, fabricate and validate a proof-of-concept seafloor array of wireless marine sensors for use in monitoring seabed processes. The sensor pods, known as Seaformatics, will be powered by ocean bottom currents and will be able to communicate with each other and to the Internet through surface master units to facilitate observation of the ocean floor from the shore. This thesis explores the use of the twisted Savonius turbine as a means of converting the kinetic energy of the free flowing water into electrical energy for the pods. This will eliminate the need for battery replacement. A physical model of the turbine was constructed and tested in the Water Flume at the Marine Institute of Memorial University and in the Wind Tunnel in the Engineering Building at Memorial University. A mathematical model of the turbine was constructed in SolidWorks. This was tested in the Computational Fluid Dynamics or CFD software FLOW-3D. Experimental results were compared with CFD results and the agreement was reasonable. A twisted Savonius turbine emulator was developed to test a dc-dc boost converter. A low cost microcontroller based MPPT algorithm was developed to obtain maximum power from the turbine. Overall the thesis shows that the twisted Savonius turbine can provide the power needed by the sensor pods. It also shows that CFD is a viable way to study the performance of the Savonius type of turbine.

Hassan, Md. Imtiaj

293

Analysis of the dynamics of a wind-turbine water-pumping system  

Microsoft Academic Search

We analyzed a wind-turbine water-pumping system, which consists of a wind turbine with a permanent magnet generator electrically coupled with a water pump via a motor-generator configuration. Beginning with a short summary of the system's steady-state analysis, we show how the success of the start-up process and how the system's performance depends on the proper choice of water pump characteristics.

E. Muljadi; G. Nix; J. T. Bialasiewicz

2000-01-01

294

Numerical study of cavitation on the surface of the guide vane in three gorges hydropower unit  

Microsoft Academic Search

Large-area erosions such as rust and obvious cavitation were found on the surface of the guide vane in Three Gorges hydropower units. A numerical explanation of the cavitation is given in this article. At first, based on the characteristic performance curves of the prototype hydro-turbine supplied by ALSTOM together with the actual operating conditions, an operating point is chosen for

Yu-cheng PENG; Xi-yang CHEN; Yan CAO; Guo-xiang HOU

2010-01-01

295

The exploitation of low-head hydropower by pressure interchange with air, using siphons  

Microsoft Academic Search

The paper describes and analyses a hydropower system based on siphons in which the pressure of low-head water is converted into air pressure. The analysis suggests that, with careful design of the è ow passages to minimize losses, air-pumping efé ciencies of 70 per cent or more should be achievable; the overall efé ciency of the hydropower system should be

M J French; M B Widden

2001-01-01

296

Fuel transfer system for multiple concentric shaft gas turbine engines  

SciTech Connect

This patent describes fuel pumping and transfer system for a turbine engine having a combustion region. The fuel system consists of: a housing; a first spool having an inner shafty rotatably mounted to the housing, the inner shaft having at least one discharge hold and an inner surface defining a central bore; a fuel tube extending axially within the central bore and mounted to the inner shaft for rotation with the inner shaft, the fuel tube having a first end and a second end, the second end of the pair of ends being adjacent the at least one discharge hole; means for supplying fuel to the fuel tube, the means for supplying in flow communication with the first end of the fuel tube, the fuel tube delivering the fuel to the second end of the fuel tube by centrifugal force when the inner shaft is rotated; means for discharging fuel from the second end of the fuel tube through the at least one discharge hold of the inner shaft, the means for discharging comprising a baffle mounted opposite the second end of the fuel tube and a dam extending radially inwardly from the inner surface of the inner shaft, the dam disposed intermediate the at least one discharge hold and the baffle whereby a ring of fuel is trapped by the dam is increased the pressure of the fuel prior to being discharged through at least one discharge hole.

Barbeau, D.E.

1988-09-13

297

Air Bearing System for Small High Speed Gas Turbines.  

National Technical Information Service (NTIS)

This paper describes the second phase of an experimental program concerning the application of air bearings to small turbomachinery test rigs and small gas turbines. The first phase examined externally pressurized (EP) journal bearings, with a novel EP th...

A. B. Turner S. J. Davies Y. L. Nimir

1994-01-01

298

Flexibility and economics of combustion turbine-based cogeneration systems  

SciTech Connect

The major objective of this paper is to discuss various options that affect the efficiency of combustion turbine cogeneration plants and the commensurate net worth impact to the firm. Topics considered include technical evaluation parameters, an efficiency definition, a cogeneration heat rate definition, the qualitative value of efficiency and the cogeneration heat rate, economic evaluation techniques, industrial processes suitable for cogeneration, equipment requirements, the combustion turbine package, the heat recovery steam generator package, balance of plant equipment, engineering and construction, the total cost of incorporating the cogeneration plant, cogeneration with the basic combustion turbine/heat recovery steam generator (CT/HRSG) cycle, cogeneration-steam production increase by ductburning, dual-pressure HRSG, the backpressure steam turbine, supercharging, separating electrical power generation from steam demand, and incorporating a backup source of steam generation.

Wohlschlegel, M.V.; Marcellino, A.; Myers, G.

1983-01-01

299

Advanced turbine systems program conceptual design and product development. Quarterly report, February 1995--April 1995  

SciTech Connect

Research continued on the design of advanced turbine systems. This report describes the design and test of critical components such as blades, materials, cooling, combustion, and optical diagnostics probes.

NONE

1995-06-01

300

ATLAS: A Small, Light Weight, Time-Synchronized Wind-Turbine Data Acquisition System.  

National Technical Information Service (NTIS)

Wind energy researchers at Sandia National Laboratories have developed a small, lightweight, time-synchronized, robust data acquisition system to acquire long-term time-series data on a wind turbine rotor. A commercial data acquisition module is utilized ...

D. E. Berg J. Zayas P. Robertson

1998-01-01

301

Torsional analysis of 1 MW gearbox and shaft system in the Avedoere wind turbine.  

National Technical Information Service (NTIS)

In order to predict undesired high gear noise emission from the Avedoere wind turbine due to critical torsional resonances in the shaft system, the torsional natural frequencies and corresponding mode shapes have been calculated. The analysis has involved...

A. Crone

1993-01-01

302

Advanced system identification techniques for wind turbine structures with special emphasis on modal parameters.  

National Technical Information Service (NTIS)

The goal of this research is to develop advanced system identification techniques that can be used to accurately measure the frequency response functions of a wind-turbine structure immersed in wind noise. To allow for accurate identification, the authors...

J. T. Bialasiewicz

1995-01-01

303

Advanced coal fueled industrial cogeneration gas turbine system. Final report, June 1986--April 1994  

SciTech Connect

Demonstration of a direct coal-fueled gas turbine system that is environmentally, technically, and economically viable depends on the satisfactory resolution of several key issues. Solar Turbines, Incorporates technical approach to these issues was to advance a complete direct coal-fueled gas turbine system that incorporated near-term technology solutions to both historically demonstrated problem areas such as deposition, erosion, and hot end corrosion, and to the emergent environmental constraints based on NO{sub x}, SO{sub x}, and particulates. Solar`s program approach was keyed to the full commercialization of the coal-fueled cogeneration gas turbine which would occur after extended field verification demonstrations conducted by the private sector. The program was structured in three phases plus an optional fourth phase: Phase 1 -- system description; Phase 2 -- component development; Phase 3 -- prototype system verification; and Phase 4 -- field evaluation.

LeCren, R.T.

1994-05-01

304

Materials and Component Development for Advanced Turbine Systems  

SciTech Connect

Hydrogen-fired and oxy-fueled land-based gas turbines currently target inlet operating temperatures of ?1425-1760°C (?2600-3200°F). In view of natural gas or syngas-fired engines, advancements in both materials, as well as aerothermal cooling configurations are anticipated prior to commercial operation. This paper reviews recent technical accomplishments resulting from NETL’s collaborative research efforts with the University of Pittsburgh and West Virginia University for future land-based gas turbine applications.

Alvin, M.A.; Pettit, F.; Meier, G.H.; Yanar, M.; Helminiak, M.; Chyu, M.; Siw, S.; Slaughter, W.S.; Karaivanov, V.; Kang, B.S.; Feng, C.; Tannebaum, J.M.; Chen, R.; Zhang, B.; Fu, T.; Richards, G.A,; Sidwell, T.G.; Straub, D.; Casleton, K.H.; Dogan, O.M.

2008-07-01

305

Software and instrumentation to monitor the performance of natural gas pipeline turbine systems  

SciTech Connect

Software for monitoring and evaluating the performance of gas turbines is being developed under the auspices of Gas Research Institute (GRI). This paper describes the PEGASUS software and monitoring system. PEGASUS is an acronym for Performance Evaluation of GAS Users Systems. Field test results, on multi-shaft turbines used in the gas pipeline industry, have demonstrated the potential of the software. The software and instrumentation, can help identify maintenance and upgrade actions to improve performance.

Levine, P.; Patanjo, D.; Lam, W.P.

1987-01-01

306

Control Sensitivity Study for a Hybrid Fuel Cell\\/Gas Turbine System  

Microsoft Academic Search

The National Energy Technology Laboratory (NETL) has developed a hardware simulator to test the operating characteristics of Solid Oxide Fuel Cell\\/Gas Turbine (SOFC\\/GT) hybrid systems. The Hybrid Performance (HyPer) simulator has been described previously, and has contributed to the understanding of SOFC\\/GT system operation. HyPer contains not only the requisite elements of gas turbine\\/compressor\\/generator, recuperator, combustor, and associated piping, but

Larry Banta; Jason Absten; Alex Tsai; R. S. Gemmen; D. A. Tucker

2008-01-01

307

Development of a high-temperature combustion catalyst system and prototype catalytic combustor turbine test results  

Microsoft Academic Search

A new combustion catalyst system for gas turbines composed of high-temperature durable ceramic catalysts made of fine manganese-substituted hexaaluminate particles and noble metal-carrying cordierite honeycomb catalysts has been developed. A 160 kW prototype catalytic combustor turbine rigged with a 220 mm in diameter catalyst system was constructed and tested including a continuous 215-hour operation and repeated sudden stops. The results

H. Sadamori; T. Tanioka; T. Matsuhisa

1995-01-01

308

Steam Turbines  

NASA Astrophysics Data System (ADS)

Turbonetics Energy, Inc.'s steam turbines are used as power generating systems in the oil and gas, chemical, pharmaceuticals, metals and mining, and pulp and paper industries. The Turbonetics line benefited from use of NASA research data on radial inflow steam turbines and from company contact with personnel of Lewis Research Center, also use of Lewis-developed computer programs to determine performance characteristics of turbines.

1981-01-01

309

Control design of an atmospheric solid oxide fuel cell\\/gas turbine hybrid system: Variable versus fixed speed gas turbine operation  

Microsoft Academic Search

This study is focused on a hybrid fuel cell\\/gas turbine (FC\\/GT) system with an atmospheric pressure solid oxide fuel cell (SOFC). The impact of the gas turbine rotational speed on dynamic performance and controllability of a hybrid system is investigated. The transient response of the FC\\/GT system to perturbations in the power demand has been investigated. Two operational strategies of

Rory Roberts; Jack Brouwer; Faryar Jabbari; Tobias Junker; Hossein Ghezel-Ayagh

2006-01-01

310

Barging Effects on Sensory Systems of Chinook Salmon Smolts  

Microsoft Academic Search

To avoid mortality caused by passage through dam turbines and spillways, juvenile Chinook salmon Oncorhynchus tshawytscha are annually transported downstream by barge through the federal hydropower system on the Snake and Columbia rivers. Survival of transported fish is higher than that of in-river migrants; however, transported fish experience higher rates of postrelease mortality. Increased mortality could result from a decrease

Michele B. Halvorsen; Lidia E. Wysocki; Carla M. Stehr; David H. Baldwin; David R. Chicoine; Nathaniel L. Scholz; Arthur N. Popper

2009-01-01

311

Knowledge-based system for detailed blade design of turbines  

NASA Astrophysics Data System (ADS)

A design optimization methodology that couples optimization techniques to CFD analysis for design of airfoils is presented. This technique optimizes 2D airfoil sections of a blade by minimizing the deviation of the actual Mach number distribution on the blade surface from a smooth fit of the distribution. The airfoil is not reverse engineered by specification of a precise distribution of the desired Mach number plot, only general desired characteristics of the distribution are specified for the design. Since the Mach number distribution is very complex, and cannot be conveniently represented by a single polynomial, it is partitioned into segments, each of which is characterized by a different order polynomial. The sum of the deviation of all the segments is minimized during optimization. To make intelligent changes to the airfoil geometry, it needs to be associated with features observed in the Mach number distribution. Associating the geometry parameters with independent features of the distribution is a fairly complex task. Also, for different optimization techniques to work efficiently the airfoil geometry needs to be parameterized into independent parameters, with enough degrees of freedom for adequate geometry manipulation. A high-pressure, low reaction steam turbine blade section was optimized using this methodology. The Mach number distribution was partitioned into pressure and suction surfaces and the suction surface distribution was further subdivided into leading edge, mid section and trailing edge sections. Two different airfoil representation schemes were used for defining the design variables of the optimization problem. The optimization was performed by using a combination of heuristic search and numerical optimization. The optimization results for the two schemes are discussed in the paper. The results are also compared to a manual design improvement study conducted independently by an experienced airfoil designer. The turbine blade optimization system (TBOS) is developed using the described methodology of coupling knowledge engineering with multiple search techniques for blade shape optimization. TBOS removes a major bottleneck in the design cycle by performing multiple design optimizations in parallel, and improves design quality at the same time. TBOS not only improves the design but also the designers' quality of work by taking the mundane repetitive task of design iterations away and leaving them more time for innovative design.

Goel, Sanjay; Lamson, Scott

1994-03-01

312

Advanced turbine systems program conceptual design and product development. Annual report, August 1994--July 1995  

SciTech Connect

This report summarizes the tasks completed under this project during the period from August 1, 1994 through July 31, 1994. The objective of the study is to provide the conceptual design and product development plan for an ultra high efficiency, environmentally superior and cost-competitive industrial gas turbine system to be commercialized by the year 2000. The tasks completed include a market study for the advanced turbine system; definition of an optimized recuperated gas turbine as the prime mover meeting the requirements of the market study and whose characteristics were, in turn, used for forecasting the total advanced turbine system (ATS) future demand; development of a program plan for bringing the ATS to a state of readiness for field test; and demonstration of the primary surface recuperator ability to provide the high thermal effectiveness and low pressure loss required to support the proposed ATS cycle.

NONE

1995-11-01

313

Performance potential of an advanced nuclear gas turbine/cogeneration system (HTGR-GT/C)  

SciTech Connect

The success of the closed-cycle gas turbine depends on utilizing high-grade waste heat. This paper presents features for an advanced nuclear gas turbine operating with a reactor outlet temperature of 950/sup 0/C. It discusses the results of a systems study exploring the performance potential of an advanced nuclear gas turbine/cogeneration concept (HTGR-GT/C) with a high-temperature gas-cooled reactor heat source. It also combined electrical power generation and process steam production.

McDonald, C.F.; Van Hagan, T.H.; Kapich, D.

1982-11-01

314

Advanced coal-fueled gas turbine systems: Subscale combustion testing. Topical report, Task 3.1  

SciTech Connect

This is the final report on the Subscale Combustor Testing performed at Textron Defense Systems` (TDS) Haverhill Combustion Laboratories for the Advanced Coal-Fueled Gas Turbine System Program of the Westinghouse Electric Corp. This program was initiated by the Department of Energy in 1986 as an R&D effort to establish the technology base for the commercial application of direct coal-fired gas turbines. The combustion system under consideration incorporates a modular staged, rich-lean-quench, Toroidal Vortex Slogging Combustor (TVC) concept. Fuel-rich conditions in the first stage inhibit NO{sub x} formation from fuel-bound nitrogen; molten coal ash and sulfated sorbent are removed, tapped and quenched from the combustion gases by inertial separation in the second stage. Final oxidation of the fuel-rich gases, and dilution to achieve the desired turbine inlet conditions are accomplished in the third stage, which is maintained sufficiently lean so that here, too, NO{sub x} formation is inhibited. The primary objective of this work was to verify the feasibility of a direct coal-fueled combustion system for combustion turbine applications. This has been accomplished by the design, fabrication, testing and operation of a subscale development-type coal-fired combustor. Because this was a complete departure from present-day turbine combustors and fuels, it was considered necessary to make a thorough evaluation of this design, and its operation in subscale, before applying it in commercial combustion turbine power systems.

Not Available

1993-05-01

315

Progress with dry low NO{sub x} gas turbine combustion system  

SciTech Connect

Solar Turbines Incorporated, based in San Diego, California, USA, has continued its product development on its SoLoNOx low emission combustion system for industrial gas turbines. As of early fall of 1995, over 130 of the 240+ SoLoNOx gas turbines ordered were in operation worldwide, achieving a cumulative operating experience of over 700 000 hours, with a high-time unit exceeding 20 000 hours. SoLoNOx combustion systems have been developed for new and retrofit applications on the Centaur, Taurus and Mars gas turbine families, where the system utilizes a dry lean-premixed combustion process to control both NO{sub x} and CO emissions over a wide gas turbine operating range. The SoLoNOx lean-premixed exhaust emission control technology has been demonstrated to be capable of meeting NO{sub x} emissions of 25 ppm while maintaining control over CO and UHC emissions. The annular combustion system configuration allows the SoLoNOx gas turbines to be exchanged with standard engines with minimal modifications to the package. The cooperative field evaluations have been instrumental in identifying and correcting key problem issues relating to the mechanical designs and control strategies. SoLoNOx combustion system development will be further concentrated on the potential of achieving lower levels of NO{sub x} and eliminating part load compressor bleed in two shaft engines.

NONE

1996-04-01

316

US hydropower resource assessment for Wisconsin.  

National Technical Information Service (NTIS)

The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The softwa...

A. M. Conner J. E. Francfort

1996-01-01

317

Economical operation of hydropower plant based on self-adaptive mutation evolutionary programming  

Microsoft Academic Search

Aiming at dispatching the load among the units of hydropower plant, economical operation of hydropower plant (EOHP) should consider the stochastic aspect of water resources systems and electricity network. As a stochastic optimization procedure, evolutionary programming (EP) is proved to be useful in optimizing difficult functions. Prior to deterministic optimization methods, a self-adaptive mutation evolutionary programming (SEP) based method for

Chenguang Xu; Qiang Huang; Maihuan Zhao; Fengwei Tian

2004-01-01

318

Impact of wind turbine systems on power system voltage stability  

Microsoft Academic Search

This paper investigates the effect of fixed speed and variable speed grid-connected wind generators on the voltage stability of a power system network. The wind generators considered are the squirrel cage induction generator (SCIG), which is a fixed speed, the doubly-fed induction generator (DFIG) and the direct driven synchronous generator (DDSG) which are variable speed. Studies were conducted on a

D. Devaraj; R. Jeevajyothi

2011-01-01

319

Air cooled turbine component having an internal filtration system  

SciTech Connect

A centrifugal particle separator is provided for removing particles such as microscopic dirt or dust particles from the compressed cooling air prior to reaching and cooling the turbine blades or turbine vanes of a turbine engine. The centrifugal particle separator structure has a substantially cylindrical body with an inlet arranged on a periphery of the substantially cylindrical body. Cooling air enters centrifugal particle separator through the separator inlet port having a linear velocity. When the cooling air impinges the substantially cylindrical body, the linear velocity is transformed into a rotational velocity, separating microscopic particles from the cooling air. Microscopic dust particles exit the centrifugal particle separator through a conical outlet and returned to a working medium.

Beeck, Alexander R. (Orlando, FL)

2012-05-15

320

Characterization of Bead Trajectories Through the Draft Tube of a Turbine Physical Model.  

SciTech Connect

Using high-speed video imaging, trajectories, and kinematics of beads passing below the turbine runner and through the draft tube region of the 1:25 scale model of a single turbine unit from Bonneville Dam powerhouse 1 were collected from May 6-9, 2003 at U.S. Army Corps of Engineers (USACE) Environmental Research and Development Center (ERDC) in Vicksburg, MS. An individual camera was used to produce 2-dimensional trajectories and paired cameras with overlapping fields of view were used to produce 3-dimension trajectories of near neutrally buoyant beads as they passed through the draft tube region of the turbine model. Image data was collected at two turbine operating levels, lower 1% efficiency and maximum rated output for beads released mid-depth into the turbine intake from each of the three gatewell slots. The purpose of this study was to determine the feasibility of using video imaging to track the trajectories of beads through the draft tube of turbine physical models and from the trajectories calculate the kinematics of the bead trajectory and the beads response to turbulence in the model. This project is part of a research program supported by the U.S. Department of Energy Advanced Hydropower Turbine System Program (AHTS) who's goal is to increase the operating potential of hydroelectric facilities while also reducing the reducing the risk of injury and death to fish as they pass through the turbines.

Weiland, Mark A.; Mueller, Robert P.; Carlson, Thomas J.; Deng, Zhiquan; McKinstry, Craig A.

2005-02-18

321

Exergy and reliability analysis of wind turbine systems: A case study  

Microsoft Academic Search

The present study undertakes an exergy and reliability analysis of wind turbine systems and applies to a local one in Turkey: the exergy performance and reliability of the small wind turbine generator have been evaluated in a demonstration (1.5kW) in Solar Energy Institute of Ege University (latitude 38.24 N, longitude 27.50 E), Izmir, Turkey. In order to extract the maximum

Onder Ozgener; Leyla Ozgener

2007-01-01

322

Simulation and experiment of a fuzzy logic based MPPT controller for a small wind turbine system  

NASA Astrophysics Data System (ADS)

This paper describes the development of a fuzzy logic based maximum power point tracking (MPPT) strategy for a variable speed wind turbine system (VSWT). For this scope, a fuzzy logic controller (FLC) was described, simulated and tested on a real time "hardware in the loop" wind turbine emulator. Simulation and experimental results show that the controller is able to track the maximum power point for various wind conditions and validate the proposed control strategy.

Petrila, Diana; Muntean, Nicolae

2012-09-01

323

Development of a gas turbine combustion system for medium-Btu fuel  

Microsoft Academic Search

The Cool Water Coal Gasification Project requires a gas turbine combustion system to burn a high hydrogen medium-Btu coal gas produced in an oxygen-blown gasifier. The gas turbine selected for this demonstration plant is a General Electric Company MS7001E unit. The plant is located in Daggett, California, a location requiring compliance with stringent environmental regulations; that is, oxides of nitrogen

J. F. Savelli; G. L. Touchton

1985-01-01

324

Advanced coal-fueled industrial cogeneration gas turbine system -- combustion development  

Microsoft Academic Search

This topical report summarizes the combustor development work accomplished under the subject contract. The objective was to develop a combustion system for the Solar 4MW Type H Centaur gas turbine generator set which was to be used to demonstrate the economic, technical and environmental feasibility of a direct coal-fueled gas turbine in a 100 hour proof-of-concept test. This program started

LeCren

1994-01-01

325

Advanced coal-fueled industrial cogeneration gas turbine system. Annual report, June 1990June 1991  

Microsoft Academic Search

Advances in coal-fueled gas turbine technology over the past few years, together with recent DOE-METC sponsored studies, have served to provide new optimism that the problems demonstrated in the past can be economically resolved and that the coal-fueled gas turbine can ultimately be the preferred system in appropriate market application sectors. The objective of the Solar\\/METC program is to prove

R. T. LeCren; L. H. Cowell; M. A. Galica; M. D. Stephenson; C. S. Wen

1991-01-01

326

Wind Turbine Generator Interaction With Diesel Generators on an Isolated Power System  

Microsoft Academic Search

The Block Island Power Company (BIPCO), on Block Island, Rhode Island, operates an isolated electric power system consisting of diesel generation and an experimental wind turbine. The 150-kW wind turbine, designated MOD-OA by the U. S. Department of Energy is typically operated in parallel with two diesel generators to serve an average winter load of 350 kW. As part of

G. W. Scott; V. F. Wilreker; R. K. Shaltens

1984-01-01

327

Application of geographical information system to site selection of small run-of-river hydropower project by considering engineering\\/economic\\/environmental criteria and social impact  

Microsoft Academic Search

In the process of site selection of a small run-of-river hydropower project in Thailand, some problems are addressed as follows: the accessibility of the possible sites which are mostly located in rural and mountainous areas, the large amount of data required, and the lack of participation of the local people living nearby. In order to cope with these problems, this

Pannathat Rojanamon; Taweep Chaisomphob; Thawilwadee Bureekul

2009-01-01

328

Geothermal energy control system and method. [downhole turbine-driven pump system  

Microsoft Academic Search

A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate superheated steam from an injected flow of clean water; the superheated steam is then used for operating a turbine-driven pump at the well bottom for pumping the hot solute-bearing water at high pressure and in liquid state to the earth's

1977-01-01

329

Technical review of Westinghouse`s Advanced Turbine Systems Program  

SciTech Connect

US DOE`s ATS program has the goals of increased efficiency of natural gas-fired power generation plants, decreased cost of electricity, and a decrease in harmful emissions. The Westinghouse ATS plant is based on an advanced gas turbine design combined with an advanced steam turbine and a high efficiency generator. Objectives of the ATS Program Phase 2 are to select the ATS cycle and to develop technologies required to achieve ATS Program goals: combustion, cooling, aerodynamics, leakage control, coatings, materials. This paper describes progress on each.

Diakunchak, I.S.; Bannister, R.L.

1995-12-31

330

Overview of Westinghouse`s Advanced Turbine Systems Program  

SciTech Connect

The proposed approach is to build on Westinghouse`s successful 501 series of gas turbines. The 501F offered a combined cycle efficiency of 54%; 501G increased this efficiency to 58%; the proposed single-shaft 400 MW class ATS combined cycle will have a plant cycle efficiency greater than 60%. Westinghous`s strategy is to build upon the next evolution of advances in combustion, aerodynamics, cooling, leakage control, materials, and mechanical design. Westinhouse will base its future gas turbine product line, both 50 and 60 Hz, on ATS technology; the 501G shows early influences of ATS.

Bannister, R.L.; Bevc, F.P.; Diakunchak, I.S.; Huber, D.J.

1995-12-31

331

Advanced Turbine System (ATS) program conceptual design and product development. Quarterly report, March 1--May 31, 1995  

SciTech Connect

Achieving the goals of 60% efficiency, 8 ppmvd NOx, and 10% electric power cost reduction imposes competing characteristics on the gas turbine system: the turbine inlet temperature of the gas turbine must increase, leading also to increased NOx emission. However, improved coating and materials technologies along with creative combustor design can result in solutions to achieve the ultimate goal. The program is focused on two specific products: a 70MW class industrial gas turbine based on the GE90 core technology utilizing an innovative air cooling technology, and a 200MW class utility gas turbine based on an advanced GE heavy duty machine utilizing advanced cooling and enhancement in component efficiency.

NONE

1995-12-31

332

A control system retrofit for a GE frame 5 turbine/generator unit  

SciTech Connect

Expecting an increase in generating capacity demand for the 1990's coupled with minimal new construction activities in the 1980's both utilities and non-utilities are considering replacement of worn out or obsolete turbomachinery control systems with modern Digital Control Systems (DCS). Retrofitting existing turbine-generators with a modern DCS will increase the effectiveness of the present capacity by: increasing the reliability of starts; increasing system availability; improving control performance; improving information display and data acquisition; and improving or replacing outdated fuel delivery systems. This paper describes a turn-key retrofit furnished by the Woodward Governor Company for a combined cycle General Electric (GE) Frame 5 Fuel Regulator controlled turbine/generator unit located at Arizona Electric Power Cooperative's (AEPCO) Apache Station. The scope of the retrofit affected the turbine operating system and the generator operating system.

Yacobucci, R.B. (End User and Retrofit Controls Engineering Turbomachinery Group, Woodward Governor Co., Fort Collins, CO (US))

1991-06-01

333

The comparative analysis of model and prototype test results of Bulb turbine  

NASA Astrophysics Data System (ADS)

This paper presents the problem of the hydropower plant oblique water inflow and its influence on the turbines operation. Oblique water inflow on the low head hydropower plant with bulb turbines influences turbine characteristics. The characteristics change occurs due to swirl incidence in the turbine inlet which spreads to the guide vanes inlet. Downstream, the flow conditions change is caused in the turbine runner in relation to the flow conditions without swirl inflow. Special attention is paid to the phenomenon of swirl flow incidence in the turbine conduit. With the aim of presenting and analyzing the oblique water inflow consequences on the hydropower plant operation, the existing turbine model tests results, performed in the laboratories, and the in situ prototype testing results have been used.

Benišek, M.; Boži?, I.; Ignjatovi?, B.

2010-08-01

334

Impact of Advanced Turbine Systems on coal-based power plants  

SciTech Connect

The advanced power-generation products currently under development in our program show great promise for ultimate commercial use. Four of these products are referred to in this paper: Integrated Gasification Combined Cycle (IGCC), Pressurized Fluidized Bed Combustion (PFBC), Externally Fired Combined Cycle (EFCC), and Integrated Gasification Fuel Cell (IGFC). Three of these products, IGCC, PFBC, and EFCC, rely on advanced gas turbines as a key enabling technology and the foundation for efficiencies in the range of 52 to 55 percent. DOE is funding the development of advanced gas turbines in the newly instituted Advanced Turbine Systems (ATS) Program, one of DOE`s highest priority natural gas initiatives. The turbines, which will have natural gas efficiencies of 60 percent, are being evaluated for coal gas compatibility as part of that program.

Bechtel, T.F.

1993-12-31

335

Office laser delivery systems for the treatment of hypertrophic turbinates  

NASA Astrophysics Data System (ADS)

We present two different methods to treat hypertrophic turbinates in an office environment: (a) with the aid of 1 mm thin hollow waveguides transmitting a CO2 laser beam to produce char-free ablation of turbinate mucosa, and (b) with the aid of a 800 micron thin optical fiber transmitting low power Nd:YAG laser radiation to interstitially coagulate and shrink submucosal tissue. Char-free ablation of mucusal tissue: An office CO2 laser regularly used for LAUP in the treatment of snoring problems is operated in the Superpulse mode (peak power 350 W) at 8 W average power. The optical beam is coupled to angled and straight hollow waveguides. Ablation of inferior turbinates is performed within a few minutes under topical or local anesthesia. No post operative packing is required and the patient can return to normal activities. Healing is fast due to the highly controlled superficial thermal damage. Interstitial coagulation of inferior turbinates: Submucosal coagulation of tissue is attained with a flat 800 (mu) fiber longitudinally pushed and pulled while operating an Nd:YAG laser at 8 W power level. A 4 - 6 mm thin coagulated and shrunken volume of cylindrical shape is being produced with no damage to bones or mucosa. The procedure is fast and performed under local anesthesia. An analysis of both surgical techniques and clinical results with over 100 patients will be presented.

Krespi, Y. P.; Slatkine, Michael

1995-05-01

336

Efficient use of energy by utilizing gas turbine combined systems  

Microsoft Academic Search

The gas turbine engine is characterized by its relatively low capital cost compared with steam power plants. It has environmental advantages and short construction lead time. However, conventional industrial engines have lower efficiencies especially at part load. One of the technologies adopted nowadays for improvement is the “combined cycle”. Hence, it is expected that the combined cycle continues to gain

Yousef S. H Najjar

2001-01-01

337

Power conversion system for transformer-less offshore wind turbine  

Microsoft Academic Search

The power of oshore wind turbines are expected to increase to 10 MW and more in the future. This will make today’s technology unsuitable due to increased nacelle weight. Therefore, this work focus on a new modular converter solution, which designed specically to a generator results in reduced nacelle weight. Additional benets are redundancy and modularity in the converter.

Sverre Skalleberg Gjerde; Tore Undeland

2011-01-01

338

Materials and Component Development for Advanced Turbine Systems.  

National Technical Information Service (NTIS)

Hydrogen-fired and oxy-fueled land-based gas turbines currently target inlet operating temperatures of approx. 1425-1760C (approx. 2600-3200F). In view of natural gas or syngas-fired engines, advancements in both materials, as well as aerothermal cooling ...

B. S. Kang G. Richards M. A. Alvin S. Siw T. G. Sidwell

2007-01-01

339

An air bearing system for small high speed gas turbines  

Microsoft Academic Search

This paper describes the second phase of an experimental program concerning the application of air bearings to small turbomachinery test rigs and small gas turbines. The first phase examined externally pressurized (EP) journal bearings, with a novel EP thrust bearing, for application to 'warm air' test rigs, and was entirely successful at rotational speeds in excess of 100,000 rpm. This

A. B. Turner; S. J. Davies; Y. L. Nimir

1994-01-01

340

Advanced system identification techniques for wind turbine structures.  

National Technical Information Service (NTIS)

The new approach to modal parameter identification, presented in this paper, uses an asymptotically stable observed to form a discrete state-space model for a wind turbine structure. The identification is performed using input-output time-series. A specia...

J. T. Bialasiewicz R. M. Osgood

1995-01-01

341

Final Report: Retrofit Aeration System (RAS) for Francis Turbine  

Microsoft Academic Search

Osage Plant and Bagnell Dam impounds the Osage River forming the Lake of the Ozarks in Missouri. Since it is nearly 100 feet deep, the lake stratifies during the summer months causing low DO water to be discharged into the Osage river below the dam. To supplement DO, the turbines are vented during the low DO season. AmerenUE is continually

Alan Sullivan; DOE Project Officer Keith Bennett

2006-01-01

342

Composition of Exhaust from a Regenerative Turbine System  

Microsoft Academic Search

Particulate and hydrocarbon content of gases in a regenerative gas turbine was analyzed at several points. Particle samples were measured with a condensation nuclei counter, a light scattering single particle counter and an impactor. Hydrocarbon analyses were made using gas chromatography. The effects of operation with JP-4 and No. 2 fuel oil were noted. It was concluded that a regenerative

A. Lieberman

1968-01-01

343

Ultra-Low NOx Gas Turbine Combustion System.  

National Technical Information Service (NTIS)

The design and initial rig testing of an ultra-low NOx gas turbine combustor primary zone are described. A lean premixed, swirl stabilized combustor was evaluated over a range of pressures up to 13.2 x 10 to the 5th power Pa (13 atm) in a test rig environ...

K. O. Smith

1986-01-01

344

Advanced Ceramic Turbine Seal System, Phases II and III.  

National Technical Information Service (NTIS)

'Final' design of the advanced engine graded ZrO2-NiCr turbine seal which includes thermal and structural analysis has been completed. Thermal fatigue, erosion and rub tolerance rig testing exceeded performance requirements with improved quality ceramic s...

1976-01-01

345

Flexibility and economics of combustion turbine-based cogeneration systems  

Microsoft Academic Search

The major objective of this paper is to discuss various options that affect the efficiency of combustion turbine cogeneration plants and the commensurate net worth impact to the firm. Topics considered include technical evaluation parameters, an efficiency definition, a cogeneration heat rate definition, the qualitative value of efficiency and the cogeneration heat rate, economic evaluation techniques, industrial processes suitable for

M. V. Wohlschlegel; A. Marcellino; G. Myers

1983-01-01

346

Candidate combustion turbine systems for the direct combustion of coal  

Microsoft Academic Search

The economic feasibility of using dirty coal-derived fuels in a combustion turbine cycle is discussed. The fuels selected were a coal gas and a coal\\/water slurry. The objectives were to define the: best feasible power cycles using dirty fuels from coal, technical problems and uncertainties that impede commercialization, and needed future R and D programs. The scope of the study

P. A. Borman; D. A. Horazak; P. W. Pillsbury

1985-01-01

347

Improve wind energy penetration in an isolated power system by a stand-alone wind pumped storage hydropower plant  

Microsoft Academic Search

As is well-known, using pumped storage system in a power system is one of ways to raise the wind energy penetration. In former studies, the introduction of pumped storage system in power production systems aims mainly at peak clipping, valley filling of a grid and so on. In the present study, a relatively novel solution is introduced to enable wind-hydro-pumped

Kun Qian; Yuxiang Jiang; Zheng Li

2011-01-01

348

DOE: Quantifying the Value of Hydropower in the Electric Grid  

SciTech Connect

The report summarizes research to Quantify the Value of Hydropower in the Electric Grid. This 3-year DOE study focused on defining value of hydropower assets in a changing electric grid. Methods are described for valuation and planning of pumped storage and conventional hydropower. The project team conducted plant case studies, electric system modeling, market analysis, cost data gathering, and evaluations of operating strategies and constraints. Five other reports detailing these research results are available a project website, www.epri.com/hydrogrid. With increasing deployment of wind and solar renewable generation, many owners, operators, and developers of hydropower have recognized the opportunity to provide more flexibility and ancillary services to the electric grid. To quantify value of services, this study focused on the Western Electric Coordinating Council region. A security-constrained, unit commitment and economic dispatch model was used to quantify the role of hydropower for several future energy scenarios up to 2020. This hourly production simulation considered transmission requirements to deliver energy, including future expansion plans. Both energy and ancillary service values were considered. Addressing specifically the quantification of pumped storage value, no single value stream dominated predicted plant contributions in various energy futures. Modeling confirmed that service value depends greatly on location and on competition with other available grid support resources. In this summary, ten different value streams related to hydropower are described. These fell into three categories; operational improvements, new technologies, and electricity market opportunities. Of these ten, the study was able to quantify a monetary value in six by applying both present day and future scenarios for operating the electric grid. This study confirmed that hydropower resources across the United States contribute significantly to operation of the grid in terms of energy, capacity, and ancillary services. Many potential improvements to existing hydropower plants were found to be cost-effective. Pumped storage is the most likely form of large new hydro asset expansions in the U.S. however, justifying investments in new pumped storage plants remains very challenging with current electricity market economics. Even over a wide range of possible energy futures, up to 2020, no energy future was found to bring quantifiable revenues sufficient to cover estimated costs of plant construction. Value streams not quantified in this study may provide a different cost-benefit balance and an economic tipping point for hydro. Future studies are essential in the quest to quantify the full potential value. Additional research should consider the value of services provided by advanced storage hydropower and pumped storage at smaller time steps for integration of variable renewable resources, and should include all possible value streams such as capacity value and portfolio benefits i.e.; reducing cycling on traditional generation.

None

2012-12-31

349

Compressor and Turbine Models of Brayton Units for Space Nuclear Power Systems  

NASA Astrophysics Data System (ADS)

Closed Brayton Cycles with centrifugal flow, single-shaft turbo-machines are being considered, with gas cooled nuclear reactors, to provide 10's to 100's of electrical power to support future space exploration missions and Lunar and Mars outposts. Such power system analysis is typically based on the cycle thermodynamics, for given operating pressures and temperatures and assumed polytropic efficiencies of the compressor and turbine of the Brayton energy conversion units. Thus the analysis results not suitable for modeling operation transients such as startup and changes in the electric load. To simulate these transients, accurate models of the turbine and compressor in the Brayton rotating unit, which calculate the changes in the compressor and turbine efficiencies with system operation are needed. This paper presents flow models that account for the design and dimensions of the compressor impeller and diffuser, and the turbine stator and rotor blades. These models calculate the various enthalpy losses and the polytropic efficiencies along with the pressure ratios of the turbine and compressor. The predictions of these models compare well with reported performance data of actual hardware. In addition, the results of a parametric analysis to map the operations of the compressor and turbine, as functions of the rotating shaft speed and inlet Mach number of the gas working fluid, are presented and discussed. The analysis used a binary mixture of He-Xe with a molecular weight of 40 g/mole as the working fluid.

Gallo, Bruno M.; El-Genk, Mohamed S.; Tournier, Jean-Michel

2007-01-01

350

US hydropower resource assessment for Hawaii  

SciTech Connect

US DOE is developing an estimate of the undeveloped hydropower potential in US. The Hydropower Evaluation Software (HES) is a computer model developed by INEL for this purpose. HES measures the undeveloped hydropower resources available in US, using uniform criteria for measurement. The software was tested using hydropower information and data provided by Southwestern Power Administration. It is a menu-driven program that allows the PC user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes, and generate reports. This report describes the resource assessment results for the State of Hawaii.

Francfort, J.E.

1996-09-01

351

Advanced turbine systems program. Final report, August 3, 1993--August 31, 1996  

SciTech Connect

Six tasks were approved under the Advanced Turbine Systems (ATS) extension program. The six tasks include the following: Task 5.0 -- Market Study. The objective of the market study task is to focus on distributed generation prospects for an industrial ATS, using the Allison ATS family as the primary gas turbine systems. Task 6.0 -- Gas Fired Advanced Turbine System (GFATS) Definition and Analysis. Task 8.01 -- Castcool{reg_sign} Blades Fabrication Process Development. Task 8.04 -- ATS Low Emission Combustion System. Task 8.07 -- Ceramic Vane Design and Evaluation. Task 9.0 -- Program Management. Each of these tasks is described, progress is discussed, and results are given.

NONE

1996-12-31

352

Advanced coal-fueled industrial cogeneration gas turbine system. Annual report, June 1990--June 1991  

SciTech Connect

Advances in coal-fueled gas turbine technology over the past few years, together with recent DOE-METC sponsored studies, have served to provide new optimism that the problems demonstrated in the past can be economically resolved and that the coal-fueled gas turbine can ultimately be the preferred system in appropriate market application sectors. The objective of the Solar/METC program is to prove the technical, economic, and environmental feasibility of a coal-fired gas turbine for cogeneration applications through tests of a Centaur Type H engine system operated on coal fuel throughout the engine design operating range. The five-year program consists of three phases, namely: (1) system description; (2) component development; (3) prototype system verification. A successful conclusion to the program will initiate a continuation of the commercialization plan through extended field demonstration runs.

LeCren, R.T.; Cowell, L.H.; Galica, M.A.; Stephenson, M.D.; Wen, C.S.

1991-07-01

353

Combining Droop Curve Concepts with Control Systems for Wind Turbine Active Power Control: Preprint  

SciTech Connect

Wind energy is becoming a larger portion of the global energy portfolio and wind penetration has increased dramatically in certain regions of the world. This increasing wind penetration has driven the need for wind turbines to provide active power control (APC) services to the local utility grid, as wind turbines do not intrinsically provide frequency regulation services that are common with traditional generators. It is common for large scale wind turbines to be decoupled from the utility grid via power electronics, which allows the turbine to synthesize APC commands via control of the generator torque and blade pitch commands. Consequently, the APC services provided by a wind turbine can be more flexible than those provided by conventional generators. This paper focuses on the development and implementation of both static and dynamic droop curves to measure grid frequency and output delta power reference signals to a novel power set point tracking control system. The combined droop curve and power tracking controller is simulated and comparisons are made between simulations using various droop curve parameters and stochastic wind conditions. The tradeoffs involved with aggressive response to frequency events are analyzed. At the turbine level, simulations are performed to analyze induced structural loads. At the grid level, simulations test a wind plant's response to a dip in grid frequency.

Buckspan, A.; Aho, J.; Pao, L.; Fleming, P.; Jeong, Y.

2012-06-01

354

Advanced turbine systems sensors and controls needs assessment study. Final report  

SciTech Connect

The Instrumentation and Controls Division of the Oak Ridge National Laboratory performed an assessment of the sensors and controls needs for land-based advanced gas turbines being designed as a part of the Department of Energy`s (DOE`s) Advanced Turbine Systems (ATS) Program for both utility and industrial applications. The assessment included visits to five turbine manufacturers. During these visits, in-depth discussions were held with design and manufacturing staff to obtain their views regarding the need for new sensors and controls for their advanced turbine designs. The Unsteady Combustion Facilities at the Morgantown Energy Technology Center was visited to assess the need for new sensors for gas turbine combustion research. Finally, a workshop was conducted at the South Carolina Energy Research and Development Center which provided a forum for industry, laboratory, and university engineers to discuss and prioritize sensor and control needs. The assessment identified more than 50 different measurement, control, and monitoring needs for advanced turbines that cannot currently be met from commercial sources. While all the identified needs are important, some are absolutely critical to the success of the ATS Program.

Anderson, R.L.; Fry, D.N.; McEvers, J.A.

1997-02-01

355

Study on Turbine System of Nuclear Power Plant Based on RELAP5\\/MOD3.4 Code  

Microsoft Academic Search

\\u000a In this paper, the secondary-loop steam turbine system has been modeled using RELAP5\\/MOD3.4 code. The operating conditions\\u000a for the turbine load have been changed from 100% FP (full power) to 80% FP that have been simulated and which will explain\\u000a transient analysis. These result shows that the transient performance of the steam turbine system components and theoretical\\u000a analysis are identical,

Shao-wu Wang; Min-jun Peng; Jian-ge Liu

356

Water hammer caused by closure of turbine safety spherical valves  

Microsoft Academic Search

This paper investigates water hammer effects caused by closure of spherical valves against the discharge. During the first phase of modernisation of Perucica high-head hydropower plant (HPP), Montenegro, safety spherical valves (inlet turbine valves) have been refurbished on the first two Pelton turbine units. The valve closure is controlled by the valve actuator (hydraulic servomotor). Because the torque acting on

U. Karadzic; A. Bergant; P. Vukoslavcevic

2010-01-01

357

Automation of Small Hydropower Station  

Microsoft Academic Search

Small hydropower (SHP) is one of the most appropriate options to meet increasing energy demand especially in a country like India, Sri Lanka where a huge power potential in this sector is available. It is clean and renewable in contrast to fossil fuel based generations which pollute the environment and whose resources are depleting fast. But high cost per unit

Raju Gupta; S. N. Singh; S. K. Singal

358

Hydropower in Bhutan and Nepal  

Microsoft Academic Search

Bhutan and Nepal have followed differing hydropower development strategies. Bhutan has co-operated with India and power export earnings have helped fund a broadly successful economic, environmental and social programme. In contrast, Nepal turned to the World Bank and other donors to fund its power projects. When World Bank funding for Arun III was withdrawn in 1995, its programme was thrown

Jeremy Berkoff

2003-01-01

359

Stability of hydropower construction programs  

Microsoft Academic Search

At the present time, when the hydropower industry of the USSR has reached high development, determination of its further prospects depends on the substantial shifts in the structure and rate of growth of many sectors of industry characteristic for recent decades. The scientific and technical revolution, complicated by depletion of the most important natural resources, increase of social needs, and

B. L. Érlikhman

1990-01-01

360

Power control of a grid-connected hybrid generation system with photovoltaic\\/wind turbine\\/battery sources  

Microsoft Academic Search

A grid-connected hybrid distributed generation system, composed of PV(photovoltaic) array, wind turbine and BESS (battery energy storage system), is proposed for various power transfer functions to the distribution network. The proposed system has several operation modes which are normal operation, power dispatching, and power averaging, according to coordinate control of the BESS and grid inverter. PV array and wind turbine

Jinhong Jeon; Seulki Kim; Changhee Cho; Jonbo Ahn; Jangmok Kim

2007-01-01

361

The study of broadband current transducer system for on-line monitoring of partial discharges in turbine generator  

Microsoft Academic Search

On-line monitoring of partial discharges (PD) in turbine generator is a important test for assessing the condition of generator insulation system. In this study, a broadband current transducer system for on-line monitoring of PD in turbine generator has been studied. Combined with a pulse height analyzer and a frequency spectrum analyzer, the transducer system has been used to detect three

Hui Ma; Jixun Ma; Guangnin Wu; Zhigang Huang; Xinyan Wu; Henkun Xie; Delin Sun; Rumin Zhang

1995-01-01

362

Performance optimization of a gas turbine-based cogeneration system  

NASA Astrophysics Data System (ADS)

In this paper an exergy optimization has been carried out for a cogeneration plant consisting of a gas turbine, which is operated in a Brayton cycle, and a heat recovery steam generator (HRSG). In the analysis, objective functions of the total produced exergy and exergy efficiency have been defined as functions of the design parameters of the gas turbine and the HRSG. An equivalent temperature is defined as a new approach to model the exergy rate of heat transfer from the HRSG. The optimum design parameters of the cogeneration cycle at maximum exergy are determined and the effects of these parameters on exergetic performance are investigated. Some practical mathematical relations are also derived to find the optimum values of the adiabatic temperature ratio for given extreme temperatures and consumer temperature.

Yilmaz, Tamer

2006-06-01

363

Application of silcomp composite materials to turbine systems  

Microsoft Academic Search

A Si\\/SiC family of high temperature composite materials is being developed which, in some respects, resembles the related reaction bonded SiC materials in terms of its corrosion resistance, temperature limits, etc., but differs in the ability to tailor its mechanical properties over a fairly wide range. Two iterations of prototype turbine combustor components have been designed and fabricated from it

Hillig

1978-01-01

364

Advanced Turbine Systems program conceptual design and product development. Quarterly report, August--October 1994  

SciTech Connect

This report addresses progress on Advanced Turbine Systems (ATS) design and testing. The most important program milestone to date occurred during this quarter. Allison successfully tested the prototype ATS high temperature turbine section to the ATS goal of 2600F Turbine Rotor Inlet Temperature. This test represented the first full engine test of the Castcool turbine airfoil cooling system. This contract provided funding for the build and test of the turbine system while other Allison IR and D funding and Navy contract funds provided the design and development successes necessary to advance this technology to the level required for a successful test. A demonstration of this kind shows what a cooperative government/industry initiative can achieve. This test itself was cut short due to a high interstage cavity temperature resulting in remaining budget at completion of test. Allison has decided that the best use of the remaining budget is to develop the manufacturing process for Castcool turbine rotor blades now that the process for the stator vanes has been proven. Development of this process will provide the basis for future engine development of this critical ATS high temperature turbine technology. DOE COR Diane Hooie agreed with this direction and Allison will proceed down this path posthaste. Allison is in the process of requesting a contract extension. Although most tasks will be completed by end of contract there are two areas where additional time is needed: (1) dynamic oxidation testing -- obtaining the goal of 5,000hrs will require an additional 2 months; (2) combustor rig testing of the ``best`` lean pre-mix module will require an additional one month. Addition time will be required to accomplish the reporting task for these efforts.

Not Available

1995-01-01

365

Increasing Power Density of Kinetic Turbines for Cost-effective Distributed Power Generation  

Microsoft Academic Search

Kinetic hydropower generation involves the use of underwater turbines in relatively high- velocity rivers. Their design is relatively inexpensive, without the requirement for costly infrastructure such as dams or powerhouses but large power production requires the use of multiple units. Furthermore, with no associated reservoir or spillway, kinetic hydropower has minimal environmental impact. The focus of this study is on

David L. F. Gaden; Eric L. Bibeau

366

Effect of Multiple Turbine Passage on Juvenile Snake River Salmonid Survival  

Microsoft Academic Search

This report describes a study conducted by Pacific Northwest National Laboratory to identify populations of migrating juvenile salmonids with a potential to be impacted by repeated exposure to turbine passage conditions. This study is part of a research program supported by the U.S. Department of Energy Wind\\/Hydropower Program. The program's goal is to increase hydropower generation and capacity while enhancing

Kenneth D. Ham; James J. Anderson; Jessica A. Vucelick

2005-01-01

367

An air bearing system for small high speed gas turbines  

NASA Astrophysics Data System (ADS)

This paper describes the second phase of an experimental program concerning the application of air bearings to small turbomachinery test rigs and small gas turbines. The first phase examined externally pressurized (EP) journal bearings, with a novel EP thrust bearing, for application to 'warm air' test rigs, and was entirely successful at rotational speeds in excess of 100,000 rpm. This second phase examined several designs of tilting pad-spiring journal bearings, one with a novel form of externally pressurized pad, but all using the original EP thrust bearing. The designs tested are described, including some oscillogram traces, for tests up to a maximum of 70,000 rpm; the most successful using a carbon pad-titanium beam spring arrangement. The thrust bearing which gave trouble-free operation throughout, is also described. The results of an original experiment to measure the 'runway speed' of a radial inflow turbine are also presented, which show that overspeeds of 58 percent above the design speed can result from free-power turbine coupling failure.

Turner, A. B.; Davies, S. J.; Nimir, Y. L.

1994-03-01

368

Hydropower-related pulsed-flow impacts on stream fishes: a brief review, conceptual model, knowledge gaps, and research needs  

Microsoft Academic Search

The societal benefits of hydropower systems (e.g., relatively clean electrical power, water supply, flood control, and recreation)\\u000a come with a cost to native stream fishes. We reviewed and synthesized the literature on hydropower-related pulsed flows to\\u000a guide resource managers in addressing significant impacts while avoiding unnecessary curtailment of hydropower operations.\\u000a Dams may release pulsed flows in response to needs for

Paciencia S. YoungJoseph; Joseph J. Cech; Lisa C. Thompson

369

Multiloop control strategy of a solid oxide fuel cell and micro gas turbine hybrid system  

Microsoft Academic Search

Solid oxide fuel cell and micro gas turbine (SOFC\\/MGT) hybrid system is a promising distributed power technology. In order to ensure the system safe operation as well as long lifetime of the fuel cell, an effective control manner is expected to regulate the temperature and fuel utilization at the desired level, and track the desired power output. Thus, a multi-loop

Xiao-Juan Wu; Xin-Jian Zhu

370

Development of Parametric Mass and Volume Models for an Aerospace SOFC/Gas Turbine Hybrid System.  

National Technical Information Service (NTIS)

In aerospace power systems, mass and volume are key considerations to produce a viable design. The utilization of fuel cells is being studied for a commercial aircraft electrical power unit. Based on preliminary analyses, a SOFC/gas turbine system may be ...

R. Tornabene X. Wang C. J. Steffen J. E. Freeh

2005-01-01

371

UTILITY ADVANCED TURBINE SYSTEMS (ATS) TECHNOLOGY READINESS TESTING PHASE 3 RESTRUCTURED (3R)  

Microsoft Academic Search

In the early 90's GE recognized the need to introduce new technology to follow on to the ''F'' technology the Company introduced in 1988. By working with industry and DOE, GE helped shape the ATS program goal of demonstrating a gas turbine, combined-cycle system using natural gas as the primary fuel that achieves the following targets: system efficiency exceeding 60%

1999-01-01

372

Automatic-control system for the 17-metre Vertical Axis Wind Turbine (VAWT)  

NASA Astrophysics Data System (ADS)

An automatic control system was designed and implemented to study automatic control of a vertical axis wind turbine (VAWT) and to better judge the fatigue life and reliability of the VAWT under what will be normal operating conditions for power production. This system, including the necessary hardware, is discussed in detail along with a simplified cost analysis.

McNerney, G. M.

1980-03-01

373

Analysis of off-grid hybrid wind turbine/solar PV water pumping systems  

Technology Transfer Automated Retrieval System (TEKTRAN)

While many remote water pumping systems exist (e.g. mechanical windmills, solar photovoltaic , wind-electric, diesel powered), very few combine both the wind and solar energy resources to possibly improve the reliability and the performance of the system. In this paper, off-grid wind turbine (WT) a...

374

Dynamic Models for Steam and Hydro Turbines in Power System Studies  

Microsoft Academic Search

Basic models for speed-governing systems and turbines in power system stability studies are presented. These models provide adequate representation for hydro, fossil-fired, and pressurized water reactor nuclear units in most stability analyses. Models for boiling water reactor nuclear units are to be presented at a later date. Typical parameters are given.

1973-01-01

375

Association of wind turbine based dispersed generators and storage systems to participate in primary frequency control  

Microsoft Academic Search

The goal of this work is to develop a supervision strategy for hybrid generation systems. This strategy must allow to improve the grid insertion of wind turbine generators (WTG) by associating them some storage systems and foreseeable decentralized generator (FDG). To maintain a reference power and to contribute to the primary frequency control with a hybrid generator based on variable

V. Courtecuisse; M. El Mokadem; B. Robyns; B. Francois; M. Petit; J. Deuse

2007-01-01

376

Automatic-control system for the 17-metre Vertical Axis Wind Turbine (VAWT)  

Microsoft Academic Search

An automatic control system was designed and implemented to study automatic control of a vertical axis wind turbine (VAWT) and to better judge the fatigue life and reliability of the VAWT under what will be normal operating conditions for power production. This system, including the necessary hardware, is discussed in detail along with a simplified cost analysis.

G. M. McNerney

1980-01-01

377

Application of Fault Tree and Model Based Fault Diagnosis in Actuation System of Hydro turbine Governors  

Microsoft Academic Search

A single diagnostic agent is difficult in solving real world problems. In this paper, we will discuss integrated distributed fault diagnosis system. Based on analyzing the failure mechanism actuation system of hydro turbine governors, a new approach combination of analyzing these trees qualitatively is offered with the aid of the tree's minimum cut-set matrix and model-based methods. The procedure is

Zhihuai Xiao; Jiang Guo; Xiangping Zhao

2006-01-01

378

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

Microsoft Academic Search

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: (1) System efficiency that will exceed 60% (lower heating value basis) on natural gas for large

Siemens Westinghouse

2001-01-01

379

Task 4 -- Conversion to a coal-fueled advanced turbine system (CFATS).  

National Technical Information Service (NTIS)

Solar is developing the technologies for a highly efficient, recuperated, Advanced Turbine System (ATS) that is aimed at the dispersed power generation market. With ultra-low-emissions in mind the primary fuel selected for this engine system is natural ga...

1996-01-01

380

Structural integrity of a gas turbine combustion system subjected to increased dynamic pressure  

Microsoft Academic Search

The effect of combustion dynamic pressure oscillations on the structural integrity of the MS 7001F dry low NOâ2 (DLN 2) combustion system has been evaluated using ANSYS finite element analyses and high cycle fatigue material data. Analytical results were validated with laboratory measurements on the combustion system subjected to combustion dynamic pressure at actual gas turbine temperature and pressure operating

J. E. Barnes

1997-01-01

381

Turbine control system upgrade for Bruce Nuclear plant units 1 and 2  

Microsoft Academic Search

The Bruce nuclear power plant commissioned in 1976 incorporated old technology in its analog turbine electro hydraulic control system (EHC), which is being upgraded to a state of the art distributed control system. The project is undertaken under the scope of Bruce A Restart project. The Bruce site consist of Bruce A and Bruce B plants, each has 4 Nuclear

Steven Frank Gray; Samir Basu

2009-01-01

382

Development of the helical reaction hydraulic turbine. Final technical report, July 1, 1996--June 30, 1998  

SciTech Connect

The present report contains the final results obtained during July 1996--July 1998. This report should be considered in association with the Annual Progress Report submitted in July 1997 due to the fact that not all of the intermediate results reflected in the Progress Report have been included in the Final Report. The aim of the project was to build a helical hydraulic turbine prototype and demonstrate its suitability and advantages as a novel apparatus to harness hydropower from ultra low-head rivers and other free water streams such as ocean currents or rivers without dams. The research objectives of the project are: Design, optimization and selection of the hydro foil section for the helical turbine; Design of the turbine for demonstration project; Construction and testing of the turbine module; Assessing test results and determining scale-up feasibility. The research conducted under this project has substantially exceeded the original goals including designing, constructing and testing of a scaled-up triple-helix turbine, as well as developing recommendations for application of the turbine for direct water pumping in irrigation systems and for future use in wind farms. Measurements collected during two years of turbine testing are kept in the PI files.

Gorlov, A.

1998-08-01

383

Wind Turbine Generator System Power Quality Test Report for the Gaia Wind 11kW Wind Turbine  

Microsoft Academic Search

This report details the power quality test on the Gaia Wind 11-kW Wind Turbine as part of the U.S. Department of Energy's Independent Testing Project. In total five turbines are being tested as part of the project. Power quality testing is one of up to five test that may be performed on the turbines including power performance, safety and function,

A. Curtis; V. Gevorgian

2011-01-01

384

Advanced Turbine System (ATS) program conceptual design and product development. Quarterly report, March 1, 1994--May 31, 1994  

SciTech Connect

GE has achieved a leadership position in the worldwide gas turbine industry in both industrial/utility markets and in aircraft engines. This design and manufacturing base plus their close contact with the users provides the technology for creation of the next generation advanced power generation systems for both the industrial and utility industries. GE has been active in the definition of advanced turbine systems for several years. These systems will leverage the technology from the latest developments in the entire GE gas turbine product line. These products will be USA based in engineering and manufacturing and are marketed through the GE Industrial and Power Systems. Achieving the advanced turbine system goals of 60% efficiency, 8 ppmvd NO{sub x} and 10% electric power cost reduction imposes competing characteristics on the gas turbine system. Two basic technical issues arise from this. The turbine inlet temperature of the gas turbine must increase to achieve both efficiency and cost goals. However, higher temperatures move in the direction of increased NO{sub x} emission. Improved coating and materials technologies along with creative combustor design can result in solutions to achieve the ultimate goal. GE`s view of the market, in conjunction with the industrial and utility objectives requires the development of Advanced Gas Turbine Systems which encompasses two potential products: a new aeroderivative combined cycle system for the industrial market and a combined cycle system for the utility sector that is based on an advanced frame machine.

NONE

1998-12-31

385

Advanced Turbine Systems Program conceptual design and product development. Quarterly report, November 1994--January 1995  

SciTech Connect

Objective of Phase II of the ATS Program is to provide the conceptual design and product development plan for anultra high efficiency, environmentally superior and cost competitive industrial gas turbine system to be commercialized by the year 2000. Technical progress covered in this report is confined to Task 4 (conversion to coal) and the nine subtasks under Task 8 (design and test of critical components). These nine subtasks address six ATS technologies: catalytic combustion, recuperator, autothermal fuel reformer, high temperature turbine disc, advanced control system, and ceramic materials.

NONE

1995-02-01

386

Identification of spatial and topographical metrics for micro hydropower applications in irrigation infrastructure  

NASA Astrophysics Data System (ADS)

A recent agreement between the Federal Energy Regulatory Commission and the State of Colorado seeks to streamline regulatory review of small, low-head hydropower (micro hydropower) projects located in constrained waterways, (Governor's Energy Office, 2010). This regulatory change will likely encourage the development of micro hydropower projects, primarily as upgrades to existing infrastructure. Previous studies of low-head hydropower projects have estimated the combined capacity of micro hydro projects in Colorado between 664 MW to 5,003 MW (Connor, A.M., et al. 1998; Hall, D.G., et al. 2004, 2006). However, these studies did not include existing hydraulic structures in irrigation canals as possible hydropower sites. A Colorado Department of Agriculture study (Applegate Group, 2011) identified existing infrastructure categories for low head hydropower development in irrigation systems, which included diversion structures, line chutes, vertical drops, pipelines, check structures and reservoir outlets. However, an accurate assessment of hydropower capacity from existing infrastructures could not be determined due to low survey responses from irrigation water districts. The current study represents the first step in a comprehensive field study to quantify the type and quantity of irrigation infrastructure for potential upgrade to support micro hydropower production. Field surveys were conducted at approximately 230 sites in 6 of Colorado's 7 hydrographic divisions at existing hydraulic control structures. The United States Bureau of Reclamation contributed approximately 330 additional sample sites from the 17 western states. The work presented here describes a novel method of identifying geospatial metrics to support an estimation of total site count and resource availability of potential micro hydropower. The proposed technique is general in nature and could be utilized to assess micro hydropower resources in any region.

Campbell, Brian

387

Deterministic versus stochastic dynamic programming for long term hydropower scheduling  

Microsoft Academic Search

This paper is concerned with the performance assessment of deterministic and stochastic dynamic programming approaches in long term hydropower scheduling. In order to focus the analysis on the stochastic nature of inflows, only single reservoir systems are considered, where the so-called \\

Monica S. Zambelli; Secundino Soares; Donato da Silva

2011-01-01

388

Wind Turbine Generator System Power Quality Test Report for the Gaia Wind 11-kW Wind Turbine  

SciTech Connect

This report details the power quality test on the Gaia Wind 11-kW Wind Turbine as part of the U.S. Department of Energy's Independent Testing Project. In total five turbines are being tested as part of the project. Power quality testing is one of up to five test that may be performed on the turbines including power performance, safety and function, noise, and duration tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification.

Curtis, A.; Gevorgian, V.

2011-07-01

389

Robust H(infinity) tracking control of boiler-turbine systems.  

PubMed

In this paper, the problem of designing a fuzzy H(infinity) state feedback tracking control of a boiler-turbine is solved. First, the Takagi and Sugeno fuzzy model is used to model a boiler-turbine system. Next, based on the Takagi and Sugeno fuzzy model, sufficient conditions for the existence of a fuzzy H(infinity) nonlinear state feedback tracking control are derived in terms of linear matrix inequalities. The advantage of the proposed tracking control design is that it does not involve feedback linearization technique and complicated adaptive scheme. An industrial boiler-turbine system is used to illustrate the effectiveness of the proposed design as compared with a linearized approach. PMID:20211466

Wu, J; Nguang, S K; Shen, J; Liu, G; Li, Y G

2010-03-07

390

Fiber-Optic Defect and Damage Locator System for Wind Turbine Blades  

SciTech Connect

IFOS in collaboration with Auburn University demonstrated the feasibility of a Fiber Bragg Grating (FBG) integrated sensor system capable of providing real time in-situ defect detection, localization and quantification of damage. In addition, the system is capable of validating wind turbine blade structural models, using recent advances in non-contact, non-destructive dynamic testing of composite structures. This new generation method makes it possible to analyze wind turbine blades not only non-destructively, but also without physically contacting or implanting intrusive electrical elements and transducers into the structure. Phase I successfully demonstrated the feasibility of the technology with the construction of a 1.5 kHz sensor interrogator and preliminary instrumentation and testing of both composite material coupons and a wind turbine blade.

Dr. Vahid Sotoudeh; Dr. Richard J. Black; Dr. Behzad Moslehi; Mr. Aleks Plavsic

2010-10-30

391

An Experimental Study of Lightning Overvoltages in Wind Turbine Generation Systems Using a Reduced-Size Model  

Microsoft Academic Search

Wind turbine generation systems are built at locations where few tall structures are found nearby so as to obtain good wind conditions, and thus, they are often struck by lightning. To promote wind power generation, lightning-protection methodologies for such wind turbine generation systems have to be established. This paper presents the result of an experimental study of lightning overvoltages in

Kazuo Yamamoto; Taku Noda; Shigeru Yokoyama; Akihiro Ametani

2006-01-01

392

Two-level backward operation of a VSMC for PMSG grid-connected variable speed wind turbine systems  

Microsoft Academic Search

Commercial wind driven electrical generation tur- bines are well engineered systems that economically extract power from the wind. These systems often restrict the range of turbine rotational speeds so as to facilitate connection of the generator to the electrical power grid. Recently research attention is turning to the possibility of operating the turbine and generator with a wide range of

Mohamed Aner; Ed Nowicki

2011-01-01

393

Fusion of a FBG-based health monitoring system for wind turbines with a fiber-optic lightning detection system  

NASA Astrophysics Data System (ADS)

Wind turbine blades are made of composite materials and reach a length of more than 42 meters. Developments for modern offshore turbines are working on about 60 meters long blades. Hence, with the increasing height of the turbines and the remote locations of the structures, health monitoring systems are becoming more and more important. Therefore, fiber-optic sensor systems are well-suited, as they are lightweight, immune against electromagnetic interference (EMI), and as they can be multiplexed. Based on two separately existing concepts for strain measurements and lightning detection on wind turbines, a fused system is presented. The strain measurement system is based on a reflective fiber-Bragg-grating (FBG) network embedded in the composite structure of the blade. For lightning detection, transmissive &fiber-optic magnetic field sensors based on the Faraday effect are used to register the lightning parameters and estimate the impact point. Hence, an existing lightning detection system will be augmented, due to the fusion, by the capability to measure strain, temperature and vibration. Load, strain, temperature and impact detection information can be incorporated into the turbine's monitoring or SCADA system and remote controlled by operators. Data analysis techniques allow dynamic maintenance scheduling to become a reality, what is of special interest for the cost-effective maintenance of large offshore or badly attainable onshore wind parks. To prove the feasibility of this sensor fusion on one optical fiber, interferences between both sensor systems are investigated and evaluated.

Krämer, Sebastian G. M.; Wiesent, Benjamin; Müller, Mathias S.; Puente León, Fernando; Méndez Hernández, Yarú

2008-06-01

394

Advanced Combustion Systems for Next Generation Gas Turbines. (Final Report, June 2002-December 2005).  

National Technical Information Service (NTIS)

Next generation turbine power plants will require high efficiency gas turbines with higher pressure ratios and turbine inlet temperatures than currently available. These increases in gas turbine cycle conditions will tend to increase NOx emissions. As the...

C. Russell J. Haynes J. Janssen M. Huffman

2006-01-01

395

30. VICTOR WATER TURBINE, STILWELLBIERCE CO., DAYTON, OHIO. SIMILAR TURBINE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

30. VICTOR WATER TURBINE, STILWELL-BIERCE CO., DAYTON, OHIO. SIMILAR TURBINE TO LEFT (DOUBLE TURBINE SYSTEM), PHOTO TAKEN FROM PENSTOCK. - Prattville Manufacturing Company, Number One, 242 South Court Street, Prattville, Autauga County, AL

396

Gas fired advanced turbine system. Phase 1, System scoping and feasibility studies.  

National Technical Information Service (NTIS)

The basic concept thus derived from the Ericsson cycle is an intercooled, recuperated, and reheated gas turbine. Theoretical performance analyses, however, showed that reheat at high turbine rotor inlet temperatures (TRIT) did not provide significant effi...

R. T. LeCren D. J. White

1993-01-01

397

Hot spot detection system for vanes or blades of a combustion turbine  

DOEpatents

This invention includes a detection system that can determine if a turbine component, such as a turbine vane or blade, has exceeded a critical temperature, such as a melting point, along any point along the entire surface of the vane or blade. This system can be employed in a conventional combustion turbine having a compressor, a combustor and a turbine section. Included within this system is a chemical coating disposed along the entire interior surface of a vane or blade and a closed loop cooling system that circulates a coolant through the interior of the vane or blade. If the temperature of the vane or blade exceeds a critical temperature, the chemical coating will be expelled from the vane or blade into the coolant. Since while traversing the closed loop cooling system the coolant passes through a detector, the presence of the chemical coating in the coolant will be sensed by the system. If the chemical coating is detected, this indicates that the vane or blade has exceeded a critical temperature.

Twerdochlib, Michael (Oviedo, FL)

1999-01-01

398

A desiccant/steam-injected gas-turbine industrial cogeneration system  

SciTech Connect

An integrated desiccant/steam-injected gas-turbine system was evaluated as an industrial cogenerator for the production of electricity and dry, heated air for product drying applications. The desiccant can be regenerated using the heated, compressed air leaving the compressor. The wet stream leaves the regenerator at a lower temperature than when it entered the desiccant regenerator, but with little loss of energy. The wet stream returns to the combustion chamber of the gas-turbine system after preheating by exchanging heat with the turbine exhaust strewn. Therefore, the desiccant is regenerated virtually energy-free. In the proposed system, the moisture-laden air exiting the desiccant is introduced into the combustion chamber of the gas-turbine power system. This paper discusses various possible design configurations, the impact of increased moisture content on the combustion process, the pressure drop across the desiccant regenerator, and the impact of these factors on the overall performance of the integrated system. A preliminary economic analysis including estimated potential energy savings when the system is used in several drying applications, and equipment and operating costs are also presented.

Jody, B.J.; Daniels, E.J.; Karvelas, D.E.; Teotia, A.P.S.

1993-01-01

399

A desiccant/steam-injected gas-turbine industrial cogeneration system  

SciTech Connect

An integrated desiccant/steam-injected gas-turbine system was evaluated as an industrial cogenerator for the production of electricity and dry, heated air for product drying applications. The desiccant can be regenerated using the heated, compressed air leaving the compressor. The wet stream leaves the regenerator at a lower temperature than when it entered the desiccant regenerator, but with little loss of energy. The wet stream returns to the combustion chamber of the gas-turbine system after preheating by exchanging heat with the turbine exhaust strewn. Therefore, the desiccant is regenerated virtually energy-free. In the proposed system, the moisture-laden air exiting the desiccant is introduced into the combustion chamber of the gas-turbine power system. This paper discusses various possible design configurations, the impact of increased moisture content on the combustion process, the pressure drop across the desiccant regenerator, and the impact of these factors on the overall performance of the integrated system. A preliminary economic analysis including estimated potential energy savings when the system is used in several drying applications, and equipment and operating costs are also presented.

Jody, B.J.; Daniels, E.J.; Karvelas, D.E.; Teotia, A.P.S.

1993-12-31

400

Characteristics of Independent Turbine Testing Facility  

Microsoft Academic Search

The Independent Turbine Testing Facility (ITTF) located at the St. Anthony Falls Hydraulic Laboratory has recently undergone extensive upgrading, funded by a grant from the small hydropower program of the US Department of Energy. Shakedown of the upgraded facility has been completed. The facility shakedown provides definitive answers regarding its capabilities and operational characteristics. This paper desires the upgraded facility,

C. Olivier; R. L. Voigt; J. S. Gulliver; R. E. A. Arndt

1989-01-01

401

US hydropower resource assessment for South Dakota  

SciTech Connect

A total of 33 sites have been identified and assessed for their hydropower potential. Information as to the potential megawatts of capacity for 4 of the sites was not available; however, these sites have been identified as having hydropower potential and are included in the group of 33. The Hydropower Evaluation Software results for site capacities range from 35 kilowatts to 234 megawatts. Most of the sites have potential capacities of under 1 megawatts. The unadjusted hydropower potential for South Dakota was identified as being 1,124 megawatts. The Hydropower Evaluation Software results lower this estimate 38% to 695 megawatts. The greatest reduction in undeveloped potential occurs at developed sites with current power production. These sites have a Hydropower Evaluation Software estimated capacity of 285 megawatts, a 50% reduction in capacity. The number of sites does not change, only the identified capacity is reassessed.

Francfort, J.E.

1993-12-01

402

Wind Turbine Generator System Duration Test Report for the Gaia-Wind 11 kW Wind Turbine  

Microsoft Academic Search

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of

A. Huskey; A. Bowen; D. Jager

2010-01-01

403

System study of an MHD/gas turbine combined-cycle baseload power plant. HTGL report No. 134  

SciTech Connect

The MHD/gas turbine combined-cycle system has been designed specifically for applications where the availability of cooling water is very limited. The base case systems which were studied consisted of an MHD plant with a gas turbine bottoming plant, and required no cooling water. The gas turbine plant uses only air as its working fluid and receives its energy input from the MHD exhaust gases by means of metal tube heat exchangers. In addition to the base case systems, vapor cycle variation systems were considered which included the addition of a vapor cycle bottoming plant to improve the thermal efficiency. These systems required a small amount of cooling water. The MHD/gas turbine systems were modeled with sufficient detail, using realistic component specifications and costs, so that the thermal and economic performance of the system could be accurately determined. Three cases of MHD/gas turbine systems were studied, with Case I being similar to an MHD/steam system so that a direct comparison of the performances could be made, with Case II being representative of a second generation MHD system, and with Case III considering oxygen enrichment for early commercial applications. The systems are nominally 800 MW/sub e/ to 1000 MW/sub e/ in size. The results show that the MHD/gas turbine system has very good thermal and economic performances while requiring either little or no cooling water. Compared to the MHD/steam system which has a cooling tower heat load of 720 MW, the Base Case I MHD/gas turbine system has a heat rate which is 13% higher and a cost of electricity which is only 7% higher while requiring no cooling water. Case II results show that an improved performance can be expected from second generation MHD/gas turbine systems. Case III results show that an oxygen enriched MHD/gas turbine system may be attractive for early commercial applications in dry regions of the country.

Annen, K.D.

1981-08-01

404

Control Sensitivity Study for a Hybrid Fuel Cell/Gas Turbine System  

SciTech Connect

The National Energy Technology Laboratory (NETL) has developed a hardware simulator to test the operating characteristics of Solid Oxide Fuel Cell/Gas Turbine (SOFC/GT) hybrid systems. The Hybrid Performance (HyPer) simulator has been described previously, and has contributed to the understanding of SOFC/GT system operation. HyPer contains not only the requisite elements of gas turbine/compressor/generator, recuperator, combustor, and associated piping, but also several air flow control valves that are proposed as system control mechanisms. It is necessary to know how operation of these valves affects the various entities such as cathode air flow, turbine speed, and various temperatures important to the safe and efficient operation of fuel cell/gas turbine hybrid systems. To determine the interactions among key variables, a series of experiments was performed in which the effect of modulating each of the key manipulated variables was recorded. This document outlines the test methods used and presents some of the data from those tests, along with analysis and interpretation of that data in the context of control system design.

Banta, Larry; Absten, Jason; Tsai, Alex; Gemmen, R.S.; Tucker, D.A.

2008-06-01

405

Performance and Internal Flow Characteristics of a Cross-Flow Hydro Turbine by the Shapes of Nozzle and Runner Blade  

NASA Astrophysics Data System (ADS)

Recently, small hydropower attracts attention because of its clean, renewable and abundant energy resources to develop. Therefore, a cross-flow hydraulic turbine is proposed for small hydropower in this study because the turbine has relatively simple structure and high possibility of applying to small hydropower. The purpose of this study is to investigate the effect of the turbine's structural configuration on the performance and internal flow characteristics of the cross-flow turbine model using CFD analysis. The results show that nozzle shape, runner blade angle and runner blade number are closely related to the performance and internal flow of the turbine. Moreover, air layer in the turbine runner plays very important roles of improving the turbine performance.

Choi, Young-Do; Lim, Jae-Ik; Kim, You-Taek; Lee, Young-Ho

406

Economic evaluation of solar thermal hybrid H 2O turbine power generation systems  

Microsoft Academic Search

The economics of two proposed solar thermal hybrid power generation systems (STHSs) have been evaluated. Each system consists of direct-steam-generation solar collectors, a steam accumulator and a gas turbine power generation system which uses steam as its working fluid. One (STHS-A) of the proposed systems emits CO2 generated by burning fuel, whereas the other (STHS-B) captures the CO2. Assuming that

Takanobu Kosugi; Pyong Sik Pak

2003-01-01

407

Development and demonstration of a solid fuel-fired gas turbine system  

Microsoft Academic Search

Western Research Institute (WRI) and Power Generating Incorporated (PGI) are developing a solid fuel-fired gas turbine system for specialized cogeneration applications. The system is based on a patented pressurized combustor designed and tested by PGI in conjunction with McConnell Industries. The other components of the system are (a) fuel receiving, preparation, storage and feeding system, (b) gas clean-up equipment, and

J. G. Speight; V. K. Sethi

1995-01-01

408

Surface profiling system optimized for inspection of turbine blades. Final report  

SciTech Connect

Research continued on the development of a surface profiling system for the inspection of turbine blades. The systems is a Numerical Stereo Camera System (NSCS). The NSCS is a high-speed 3-D topographical surface mapping system that projects a structured pattern laser light onto the surface of a target object, views the projected pattern with an axis video camera, and calculates the 3-D profile of the surface from that apparent distortion in the pattern as it appears on target surface.

NONE

1995-11-28

409

Advanced turbine systems program conceptual design and product development. Quarterly report, August--October 1995  

SciTech Connect

This report describes the tasks completed for the advanced turbine systems program. The topics of the report include last row turbine blade development, single crystal blade casting development, ceramic materials development, combustion cylinder flow mapping, shroud film cooling, directional solidified valve development, shrouded blade cooling, closed-loop steam cooling, active tip clearance control, flow visualization tests, combustion noise investigation, TBC field testing, catalytic combustion development, optical diagnostics probe development, serpentine channel cooling tests, brush seal development, high efficiency compressor design, advanced air sealing development, advanced coating development, single crystal blade development, Ni-based disc forging development, and steam cooling effects on materials.

NONE

1996-01-01

410

Update on Development of Auto-Venting Turbine Technology  

Microsoft Academic Search

Since the 1970s, the Tennessee Valley Authority (TVA) has been active in development of technology for the auto-venting turbine. Auto-venting turbines increase the concentration of dissolved oxygen in hydropower releases by aspirating and mixing air with the water passing through the runner. Prior to 1990, much of the emphasis for auto-venting turbine (AVT) technology focused on the development of methods

Paul Hopping; Patrick March; Thomas Brice; Joseph Cybularz

411

Integration of Wind-Turbine Generators (WTGs) into Hybrid Distributed Generation Systems in Extreme Northern Climates  

Microsoft Academic Search

This paper discusses the effects of integrating wind-turbine generators (WTGs) into hybrid distributed generation systems in extreme northern climates. The hybrid performance analysis tool presented incorporates the added features of dynamic modeling and the graphical user interface available in MATLAB™ Simulink. The model currently consists of a diesel-electric generator, a battery storage bank, and WTGs connected to a common grid

RICHARD W. WIES; RONALD A. JOHNSON; ASHISH N. AGRAWAL

2005-01-01

412

SOFC-Gas Turbine Hybrid System for Aircraft Applications: Modeling and Performance Analysis  

Microsoft Academic Search

There is a growing interest in fuel cells for aircraft applications. Fuel cells when combined with conventional turbine power plants offer high fuel efficiencies. The feature of fuel cells (SOFC, MCFC) used in aircraft applications, which makes them suitable for hybrid systems, is their high operating temperature. Their dynamic nature, both electrical and thermodynamic, demands a dynamic study of the

Nischal Srivastava

2005-01-01

413

A new monitoring system for wind turbines with doubly-fed induction generators  

Microsoft Academic Search

For modern large wind farms, it is interesting to design an efficient diagnosis system oriented to wind turbine generators based on doubly-fed induction machine (DFIM). Intensive research efforts have been focused on the signature analysis to predict or to detect electrical and mechanical faults in induction machines. Different signals can be used such as voltages, currents or stray flux. In

A. Yazidi; G. A. Capolino; F. Filippetti; D. Casadei

2006-01-01

414

Kinetic Energy of Wind-Turbine Generators for System Frequency Support  

Microsoft Academic Search

As wind power penetration increases and fossil plants are retired, it is feared that there will be insufficient kinetic energy (KE) from the plants to support the system frequency. This paper shows the fear is groundless because the high inertias (H cong 4 seconds) of wind turbine-generators (WTGs) can be integrated to provide frequency support during generation outage.

Ping-Kwan Keung; Pei Li; Hadi Banakar; Boon Teck Ooi

2009-01-01

415

Thermodynamic performance evaluation of combustion gas turbine cogeneration system with reheat  

Microsoft Academic Search

This communication presents thermodynamic methodology for the performance evaluation of combustion gas turbine cogeneration system with reheat. The energetic and exergetic efficiencies have been defined. The effects of process steam pressure and pinch point temperature used in the design of heat recovery steam generator, and reheat on energetic and exergetic efficiencies have been investigated. From the results obtained in graphs

A Khaliq; S. C Kaushik

2004-01-01

416

Motion performance and mooring system of a floating offshore wind turbine  

NASA Astrophysics Data System (ADS)

The development of offshore wind farms was originally carried out in shallow water areas with fixed (seabed mounted) structures. However, countries with limited shallow water areas require innovative floating platforms to deploy wind turbines offshore in order to harness wind energy to generate electricity in deep seas. The performances of motion and mooring system dynamics are vital to designing a cost effective and durable floating platform. This paper describes a numerical model to simulate dynamic behavior of a new semi-submersible type floating offshore wind turbine (FOWT) system. The wind turbine was modeled as a wind block with a certain thrust coefficient, and the hydrodynamics and mooring system dynamics of the platform were calculated by SESAM software. The effect of change in environmental conditions on the dynamic response of the system under wave and wind loading was examined. The results indicate that the semi-submersible concept has excellent performance and SESAM could be an effective tool for floating wind turbine design and analysis.

Zhao, Jing; Zhang, Liang; Wu, Haitao

2012-09-01

417

Advanced coal-fueled industrial cogeneration gas turbine system: Hot End Simulation Rig  

Microsoft Academic Search

This Hot End Simulation Rig (HESR) was an integral part of the overall Solar\\/METC program chartered to prove the technical, economic, an environmental feasibility of a coal-fueled gas turbine, for cogeneration applications. The program was to culminate in a test of a Solar Centaur Type H engine system operated on coal slurry fuel throughput the engine design operating range. This

Galica

1994-01-01

418

Development of coal-fueled gas turbine systems for electric utility application  

Microsoft Academic Search

The authors' companies are working to establish the technology base for an advanced direct coal-fired gas turbine system. This work, sponsored by the Department of Energy, is directed at the electric utility application. This paper describes the technical approach and discusses its feasibility. Successful development of a slagging combustor is key to this effort. Integrated testing incorporates the subscale slagging

R. J. Thoman; D. A. Horazak; F. A. Hals

1987-01-01

419

Integrated low emissions cleanup system for direct coal fired turbines. Final report.  

National Technical Information Service (NTIS)

Solid oxide electrochemical systems were evaluated for the reduction of NO(sub x) and SO(sub x) in a coal-fired turbine exhaust. Yttria stabilized ceria and zirconia were studied as electrolytes over the temperature range 1,600---2,500(degrees)F. Yttria s...

L. A. Siwajek D. Ku

1990-01-01

420

A six-wafer combustion system for a silicon micro gas turbine engine  

Microsoft Academic Search

As part of a program to develop a micro gas turbine engine capable of producing 10-50 W of electrical power in a package less than one cubic centimeter in volume, we present the design, fabrication, packaging, and experimental test results for the 6-wafer combustion system for a silicon microengine. Comprising the main nonrotating functional components of the engine, the device

A. Mehra; Xin Zhang; A. A. Ayon; I. A. Waitz; M. A. Schmidt; C. M. Spadaccini

2000-01-01

421

Some questions regarding making the steam turbine low-pressure regeneration system more economically efficient  

NASA Astrophysics Data System (ADS)

We consider matters of making the low-pressure regeneration system of modern steam-turbine units at Russian district thermal and nuclear power stations more efficient, using investigations carried out on 300- and 800-MW power units as an example.

Sukhorukov, Yu. G.; Ermolov, V. F.; Trifonov, N. N.

2008-12-01

422

Performance evaluation of a gas turbine cycle with a pulse combustion system  

Microsoft Academic Search

This paper presents a comprehensive analysis of the effect of a pulse combustion system on the performance of a gas turbine cycle. The advantages of pulse combustors are numerous. The purpose of this paper, is to analyze theoretically this effect so that the resultant changes in performance can be estimated without experiment. In addition, this paper investigates the utilization of

I. G. El-Gizawy; M. A. Gadalla

1997-01-01

423

A coal-fueled combustion turbine cogeneration system with topping combustion  

Microsoft Academic Search

Cogeneration systems fired with coal or other solid fuels and containing conventional extracting-condensing or back pressure steam turbines can be found throughout the world. A potentially more economical plant of higher output per unit thermal energy is presented that employs a pressurized fluidized bed (PFB) and coal carbonizer. The carbonizer produces a char that is fed to the PFB and

J. M. Beer; R. V. Garland

1997-01-01

424

All electric controls and accessories for ground vehicle gas turbine propulsion systems  

Microsoft Academic Search

This paper discusses the use of electro-mechanical devices as the kinematic portions of a microprocessor based gas turbine control system. Specific applications are: 1. An electric motor driven positive displacement pump, which provides metered high pressure fuel to the distribution manifold. Fuel metering to be provided by varying the motor angular velocity; 2. An electric motor driven lube oil pump;

Powd

1986-01-01

425

Systems Study for Improving Gas Turbine Performance for Coal/IGCC Application  

SciTech Connect

This study identifies vital gas turbine (GT) parameters and quantifies their influence in meeting the DOE Turbine Program overall Integrated Gasification Combined Cycle (IGCC) plant goals of 50% net HHV efficiency, $1000/kW capital cost, and low emissions. The project analytically evaluates GE advanced F class air cooled technology level gas turbine conceptual cycle designs and determines their influence on IGCC plant level performance including impact of Carbon capture. This report summarizes the work accomplished in each of the following six Tasks. Task 1.0--Overall IGCC Plant Level Requirements Identification: Plant level requirements were identified, and compared with DOE's IGCC Goal of achieving 50% Net HHV Efficiency and $1000/KW by the Year 2008, through use of a Six Sigma Quality Functional Deployment (QFD) Tool. This analysis resulted in 7 GT System Level Parameters as the most significant. Task 2.0--Requirements Prioritization/Flow-Down to GT Subsystem Level: GT requirements were identified, analyzed and prioritized relative to achieving plant level goals, and compared with the flow down of power island goals through use of a Six Sigma QFD Tool. This analysis resulted in 11 GT Cycle Design Parameters being selected as the most significant. Task 3.0--IGCC Conceptual System Analysis: A Baseline IGCC Plant configuration was chosen, and an IGCC simulation analysis model was constructed, validated against published performance data and then optimized by including air extraction heat recovery and GE steam turbine model. Baseline IGCC based on GE 207FA+e gas turbine combined cycle has net HHV efficiency of 40.5% and net output nominally of 526 Megawatts at NOx emission level of 15 ppmvd{at}15% corrected O2. 18 advanced F technology GT cycle design options were developed to provide performance targets with increased output and/or efficiency with low NOx emissions. Task 4.0--Gas Turbine Cycle Options vs. Requirements Evaluation: Influence coefficients on 4 key IGCC plant level parameters (IGCC Net Efficiency, IGCC Net Output, GT Output, NOx Emissions) of 11 GT identified cycle parameters were determined. Results indicate that IGCC net efficiency HHV gains up to 2.8 pts (40.5% to 43.3%) and IGCC net output gains up to 35% are possible due to improvements in GT technology alone with single digit NOx emission levels. Task 5.0--Recommendations for GT Technical Improvements: A trade off analysis was conducted utilizing the performance results of 18 gas turbine (GT) conceptual designs, and three most promising GT candidates are recommended. A roadmap for turbine technology development is proposed for future coal based IGCC power plants. Task 6.0--Determine Carbon Capture Impact on IGCC Plant Level Performance: A gas turbine performance model for high Hydrogen fuel gas turbine was created and integrated to an IGCC system performance model, which also included newly created models for moisturized syngas, gas shift and CO2 removal subsystems. This performance model was analyzed for two gas turbine technology based subsystems each with two Carbon removal design options of 85% and 88% respectively. The results show larger IGCC performance penalty for gas turbine designs with higher firing temperature and higher Carbon removal.

Ashok K. Anand

2005-12-16

426

An Improved Algorithm for Hydropower Optimization  

NASA Astrophysics Data System (ADS)

A new algorithm named energy management by successive linear programming (EMSLP) was developed to solve the optimization problem of the hydropower system operation. The EMSLP algorithm has two iteration levels: at the first level a stable solution is sought, and at the second the interior of the feasible region is searched to improve the objective function whenever its value decreases. The EMSLP algorithm has been tested using the Manitoba Hydro system data applied to a single reservoir system. To evaluate the performance of the algorithm the comparison has been made with the results obtained by the energy management and maintenance analysis (EMMA) program used in the Manitoba Hydro practice. The paper describes the EMSLP algorithm and presents the results of the comparison with EMMA.

Reznicek, K. K.; Simonovic, S. P.

1990-02-01

427

A Stand-Alone Hybrid Generation System Combining Solar Photovoltaic and Wind Turbine with Simple Maximum Power Point Tracking Control  

Microsoft Academic Search

This paper proposes a hybrid energy system combing solar photovoltaic and wind turbine as a small-scale alternative source of electrical energy where conventional generation is not practical. A simple and cost effective control technique has been proposed for maximum power point tracking from the photovoltaic array and wind turbine under varying climatic conditions without measuring the irradiance of the photovoltaic

Nabil A. Ahmed; Masafumi Miyatake

2006-01-01

428

A Study of Transient Magnetic Fields in a Nacelle of a Wind Turbine Generator System due to Lightning  

Microsoft Academic Search

A wind turbine generator system is composed of blades, a nacelle, a tower etc. In recent year, to make the blades and the nacelle lighter, the blades are often made from GFRP (Glass Fiber Reinforced Plastics) and the nacelle is composed of steel grids and GFRP covering it. When the lightning strikes the wind turbine, the current flows into the

Kazuo Yamamoto; Tomohiro Chikara; Akihiro Ametani

2009-01-01

429

Development progress on the atmospheric fluidized bed coal combustor for cogeneration gas turbine system for industrial cogeneration plants  

Microsoft Academic Search

The Atmospheric Fluidized Bed Coal Combustor Program will develop the technology for a fluidized bed coal combustion system to provide a source of high temperature air for process heating and power generation with gas turbines in industrial plants. The gas turbine has the advantages of a higher ratio of electric power output to exhaust heat load and a higher exhaust

R. S. Holcomb

1979-01-01

430

Advanced Turbine Systems (ATS) program conceptual design and product development. Quarterly progress report, December 1, 1995--February 29, 1996  

SciTech Connect

This report describes the overall program status of the General Electric Advanced Gas Turbine Development program, and reports progress on three main task areas. The program is focused on two specific products: (1) a 70-MW class industrial gas turbine based on the GE90 core technology, utilizing a new air cooling methodology; and (2) a 200-MW class utility gas turbine based on an advanced GE heavy-duty machine, utilizing advanced cooling and enhancement in component efficiency. The emphasis for the industrial system is placed on cycle design and low emission combustion. For the utility system, the focus is on developing a technology base for advanced turbine cooling while achieving low emission combustion. The three tasks included in this progress report are on: conversion to a coal-fueled advanced turbine system, integrated program plan, and design and test of critical components. 13 figs., 1 tab.

NONE

1997-06-01

431

Definitional mission report on U. S. hydropower sector international competitiveness. Export trade information  

SciTech Connect

The report assesses the U.S. hydropower sector's technological competitiveness in major equipment categories such as turbines/generators, switch gears, transformers, etc. for the full range of hydroelectric power plants, that is, from small plants of 50MW or less to large plants such as Guayabo-Siquirres. The subject has three interwoven threads, each affecting the others but subject to individual discussion. They are technological ability; productivity and the state of industrial plant; and management and sales methods.

Boyd, E.L.

1992-06-01

432

Methodology and Process for Condition Assessment at Existing Hydropower Plants  

SciTech Connect

Hydropower Advancement Project was initiated by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy to develop and implement a systematic process with a standard methodology to identify the opportunities of performance improvement at existing hydropower facilities and to predict and trend the overall condition and improvement opportunity within the U.S. hydropower fleet. The concept of performance for the HAP focuses on water use efficiency how well a plant or individual unit converts potential energy to electrical energy over a long-term averaging period of a year or more. The performance improvement involves not only optimization of plant dispatch and scheduling but also enhancement of efficiency and availability through advanced technology and asset upgrades, and thus requires inspection and condition assessment for equipment, control system, and other generating assets. This paper discusses the standard methodology and process for condition assessment of approximately 50 nationwide facilities, including sampling techniques to ensure valid expansion of the 50 assessment results to the entire hydropower fleet. The application and refining process and the results from three demonstration assessments are also presented in this paper.

Zhang, Qin Fen [ORNL; Smith, Brennan T [ORNL; Cones, Marvin [Mesa Associates, Inc.; March, Patrick [Hydro Performance Processes, Inc.; Dham, Rajesh [U.S. Department of Energy; Spray, Michael [New West Technologies, LLC.

2012-01-01

433

Fluid Flow Analysis of the SSME (Space Shuttle Main Engine) High Pressure Fuel and Oxidizer Turbine Coolant Systems.  

National Technical Information Service (NTIS)

The objective is to provide improved analysis capability for the Space Shuttle Main Engine (SSME) high pressure fuel and oxidizer turbine coolant systems. Each of the systems was analyzed to determine fluid flow rate and thermodynamic and transport proper...

G. A. Teal

1989-01-01

434

Data-Based Performance Assessments for the DOE Hydropower Advancement Project  

SciTech Connect

The U. S. Department of Energy s Hydropower Advancement Project (HAP) was initiated to characterize and trend hydropower asset conditions across the U.S.A. s existing hydropower fleet and to identify and evaluate the upgrading opportunities. Although HAP includes both detailed performance assessments and condition assessments of existing hydropower plants, this paper focuses on the performance assessments. Plant performance assessments provide a set of statistics and indices that characterize the historical extent to which each plant has converted the potential energy at a site into electrical energy for the power system. The performance metrics enable benchmarking and trending of performance across many projects in a variety contexts (e.g., river systems, power systems, and water availability). During FY2011 and FY2012, assessments will be performed on ten plants, with an additional fifty plants scheduled for FY2013. This paper focuses on the performance assessments completed to date, details the performance assessment process, and describes results from the performance assessments.

March, Patrick [Hydro Performance Processes, Inc.; Wolff, Dr. Paul [WolffWare Ltd.; Smith, Brennan T [ORNL; Zhang, Qin Fen [ORNL; Dham, Rajesh [U.S. Department of Energy

2012-01-01

435

Development and demonstration of a wood-fired gas turbine system  

SciTech Connect

Power Generating Inc. (PGI) has developed and patented a unique direct-fired gas turbine power system (PGI Power System) that operates on solid wood-based fuels. The PGI Power System is designed to generate from 500 kilowatts to 3.5 megawatts of electrical power and up to 30 million Btu per hour of thermal energy for various industrial and utility applications. The system is expected to operate at thermal efficiency levels greater than 70% through full utilization of both the electrical and thermal energy it generates at a specific host facility. PGI and WRI built a 450-kW prototype system at the Western Research Institute (WRI) facilities in Laramie, Wyoming, to demonstrate the technical and economic viability of the PGI Power System. The plant has undergone a brief shakedown, and is presently being operated on white wood. In previous attempts to develop similar systems, the major technical hindrance to long-term operation of a gas turbine power system has been degradation of the hot section in the gas turbine. This problem is overcome in the PGI Power System through its unique design, by closely controlling fuel specifications, and by developing specialized operating procedures. In wood-fired testing conducted to date, no degradation in the engine performance is obvious.

Sethi, V.

1997-10-01

436

LASER STABILIZATION FOR NEAR ZERO NO{sub x} GAS TURBINE COMBUSTION SYSTEMS  

SciTech Connect

Historically, the development of new industrial gas turbines has been primarily driven by the intent to achieve higher efficiency, lower operating costs and lower emissions. Higher efficiency and lower cost is obtained through higher turbine operating temperatures, while reduction in emissions is obtained by extending the lean operating limit of the combustor. However reduction in the lean stability limit of operation is limited greatly by the chemistry of the combustion process and by the occurrence of thermo-acoustic instabilities. Solar Turbines, CFD Research Corporation, and Los Alamos National Laboratory have teamed to advance the technology associated with laser-assisted ignition and flame stabilization, to a level where it could be incorporated onto a gas turbine combustor. The system being developed is expected to enhance the lean stability limit of the swirl stabilized combustion process and assist in reducing combustion oscillations. Such a system has the potential to allow operation at the ultra-lean conditions needed to achieve NO{sub x} emissions below 5 ppm without the need of exhaust treatment or catalytic technologies. The research effort was focused on analytically modeling laser-assisted flame stabilization using advanced CFD techniques, and experimentally demonstrating the technology, using a solid-state laser and low-cost durable optics. A pulsed laser beam was used to generate a plasma pool at strategic locations within the combustor flow field such that the energy from the plasma became an ignition source and helped maintain a flame at ultra lean operating conditions. The periodic plasma generation and decay was used to nullify the fluctuations in the heat release from the flame itself, thus decoupling the heat release from the combustor acoustics and effectively reducing the combustion oscillations. The program was built on an existing technology base and includes: extending LANL's existing laser stabilization experience to a sub-scale combustor rig, performing and validating CFD predictions, and ultimately conducting a full system demonstration in a multi-injector combustion system at Solar Turbines.

Vivek Khanna

2002-09-30

437

Gas turbine repowering haikibutsu fukugo hatsuden system. (Survey of consolidation for gas turbine re-powering combined WPP (waste power plant) project).  

National Technical Information Service (NTIS)

This report describes the survey of gas turbine re-powering combined WPP (or super WPP), which was commercialized by Gunma Prefecture for the first time as an electric power wholesaler in Japan. An outline of the survey is introduced. The system optimizat...

1997-01-01

438

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

SciTech Connect

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: {lg_bullet} System efficiency that will exceed 60%(lower heating value basis) on natural gas for large scale utility turbine systems; for industrial applications, systems that will result in a 15% improvement in heat rate compared to currently available gas turbine systems. {lg_bullet} An environmentally superior system that will not require the use of post combustion emissions controls under full load operating conditions. {lg_bullet} Busbar energy costs that are 10% less than current state-of-the-art turbine systems, while meeting the same environmental requirements. {lg_bullet} Fuel-flexible designs that will operate on natural gas but are capable of being adapted to operate on coal-derived or biomass fuels. {lg_bullet} Reliability-Availability-Maintainability (RAM) that is equivalent to the current turbine systems. {lg_bullet} Water consumption minimized to levels consistent with cost and efficiency goals. {lg_bullet} Commercial systems that will enter the market in the year 2000. In Phase I of the ATS program, Siemens Westinghouse found that efficiency significantly increases when the traditional combined-cycle power plant is reconfigured with closed-loop steam cooling of the hot gas path. Phase II activities involved the development of a 318MW natural gas fired turbine conceptual design with the flexibility to burn coal-derived and biomass fuels. Phases I and II of the ATS program have been completed. Phase III, the current phase, completes the research and development activities and develops hardware specifications from the Phase II conceptual design. This report summarizes Phase III Extension activities for a three-month period. Additional details may be found in monthly technical progress reports covering the period stated on the cover of this report. Background information regarding the work to be completed in Phase III may be found in the revised proposal submitted in response to A Request for Extension of DE-FC21-95MC32267, dated May 29, 1998 and the Continuing Applications of DE-FC21-95MC32267, dated March 31, 1999 and November 19, 1999.

Siemens Westinghouse

2001-06-30

439

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

SciTech Connect

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: (1) System efficiency that will exceed 60% (lower heating value basis) on natural gas for large scale utility turbine systems; for industrial applications, systems that will result in a 15% improvement in heat rate compared to currently available gas turbine systems. (2) An environmentally superior system that will not require the use of post combustion emissions controls under full load operating conditions. (3) Busbar energy costs that are 10% less than current state-of-the-art turbine systems, while meeting the same environmental requirements. (4) Fuel-flexible designs that will operate on natural gas but are capable of being adapted to operate on coal-derived or biomass fuels. (5) Reliability-Availability-Maintainability (RAM) that is equivalent to the current turbine systems. (6) Water consumption minimized to levels consistent with cost and efficiency goals. (7) Commercial systems that will enter the market in the year 2000. In Phase I of the ATS program, Siemens Westinghouse found that efficiency significantly increases when the traditional combined-cycle power plant is reconfigured with closed-loop steam cooling of the hot gas path. Phase II activities involved the development of a 318MW natural gas fired turbine conceptual design with the flexibility to burn coal-derived and biomass fuels. Phases I and II of the ATS program have been completed. Phase III, the current phase, completes the research and development activities and develops hardware specifications from the Phase II conceptual design. This report summarizes Phase III Extension activities for a three month period. Additional details may be found in monthly technical progress reports covering the period stated on the cover of this report. Background information regarding the work to be completed in Phase III may be found in the revised proposal submitted in response to A Request for Extension of DE-FC21-95MC32267, dated May 29, 1998 and the Continuing Applications of DE-FC21-95MC32267, dated March 31, 1999 and November 19, 1999.

Siemens Westinghouse

2001-09-30

440

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

SciTech Connect

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: {lg_bullet} System efficiency that will exceed 60%(lower heating value basis) on natural gas for large scale utility turbine systems; for industrial applications, systems that will result in a 15% improvement in heat rate compared to currently available gas turbine systems. {lg_bullet} An environmentally superior system that will not require the use of post combustion emissions controls under full load operating conditions. {lg_bullet} Busbar energy costs that are 10% less than current state-of-the-art turbine systems, while meeting the same environmental requirements. {lg_bullet} Fuel-flexible designs that will operate on natural gas but are capable of being adapted to operate on coal-derived or biomass fuels. {lg_bullet} Reliability-Availability-Maintainability (RAM) that is equivalent to the current turbine systems. {lg_bullet} Water consumption minimized to levels consistent with cost and efficiency goals. {lg_bullet} Commercial systems that will enter the market in the year 2000. In Phase I of the ATS program, Siemens Westinghouse found that efficiency significantly increases when the traditional combined-cycle power plant is reconfigured with closed-loop steam cooling of the hot gas path. Phase II activities involved the development of a 318MW natural gas fired turbine conceptual design with the flexibility to burn coal-derived and biomass fuels. Phases I and II of the ATS program have been completed. Phase III, the current phase, completes the research and development activities and develops hardware specifications from the Phase II conceptual design. This report summarizes Phase III extension activities for a three month period. Additional details may be found in monthly technical progress reports covering the period stated on the cover of this report. Background information regarding the work to be completed in Phase III may be found in the revised proposal submitted in response to A Request for Extension of DE-FC21-95MC32267, dated May 29, 1998 and the Continuing Applications of DE-FC21-95MC32267, dated March 31, 1999 and November 19, 1999.

Siemens Westinghouse

2000-12-31

441

Modeling a high output marine steam generator feedwater control system which uses parallel turbine-driven feed pumps  

NASA Astrophysics Data System (ADS)

Parallel turbine-driven feedwater pumps are needed when ships travel at high speed. In order to study marine steam generator feedwater control systems which use parallel turbine-driven feed pumps, a mathematical model of marine steam generator feedwater control system was developed which includes mathematical models of two steam generators and parallel turbine-driven feed pumps as well as mathematical models of feedwater pipes and feed regulating valves. The operating condition points of the parallel turbine-driven feed pumps were calculated by the Chebyshev curve fit method. A water level controller for the steam generator and a rotary speed controller for the turbine-driven feed pumps were also included in the model. The accuracy of the mathematical models and their controllers was verified by comparing their results with those from a simulator.

Qiu, Zhi-Qiang; Zou, Hai; Sun, Jian-Hua

2008-09-01

442

Advanced turbine systems (ATS) program conceptual design and product development. Quarterly report, September 1 - November 30, 1994  

SciTech Connect

Achieving the advanced turbine system goals of 60% efficiency, 8 ppmvd NOx, and 10% electric power cost reduction imposes competing characteristics on the gas turbine system: the turbine inlet temperature must increase, although this will lead to increased NOx emission. Improved coating and materials along with creative combustor design can result in solutions. The program is focused on two specific products: a 70 MW class industrial gas turbine based on GE90 core technology utilizing an innovative air cooling methodology, and a 200 MW class utility gas turbine based on an advanced GE heavy duty machines utilizing advanced cooling and enhancement in component efficiency. This report reports on tasks 3-8 for the industrial ATS and the utility ATS. Some impingement heat transfer results are given.

NONE

1994-12-31

443

Advanced Turbine Systems (ATS) program conceptual design and product development. Quarterly report, December 1, 1993--February 28, 1994  

SciTech Connect

GE has achieved a leadership position in the worldwide gas turbine industry in both industrial/utility markets and in aircraft engines. This design and manufacturing base plus our close contact with the users provides the technology for creation of the next generation advanced power generation systems for both the industrial and utility industries. GE has been active in the definition of advanced turbine systems for several years. These systems will leverage the technology from the latest developments in the entire GE gas turbine product line. These products will be USA based in engineering and manufacturing and are marketed through the GE Industrial and Power Systems. Achieving the advanced turbine system goals of 60% efficiency, 8 ppmvd NOx and 10% electric power cost reduction imposes competing characteristics on the gas turbine system. Two basic technical issues arise from this. The turbine inlet temperature of the gas turbine must increase to achieve both efficiency and cost goals. However, higher temperatures move in the direction of increased NOx emission. Improved coating and materials technologies along with creative combustor design can result in solutions to achieve the ultimate goal.

NONE

1997-06-01

444

Advanced Turbine Systems (ATS) program conceptual design and product development. Quarterly report, August 25--November 30, 1993  

SciTech Connect

GE has achieved a leadership position in the worldwide gas turbine industry in both industrial/utility markets and in aircraft engines. This design and manufacturing base plus our close contact with the users provides the technology for creation of the next generation advanced power generation systems for both the industrial and utility industries. GE has been active in the definition of advanced turbine systems for several years. These systems will leverage the technology from the latest developments in the entire GE gas turbine product line. These products will be USA based in engineering and manufacturing and are marketed through the GE Industrial and Power Systems. Achieving the advanced turbine system goals of 60% efficiency, 8 ppmvd NOx and 10% electric power cost reduction imposes competing characteristics on the gas turbine system. Two basic technical issues arise from this. The turbine inlet temperature of the gas turbine must increase to achieve both efficiency and cost goals. However, higher temperatures move in the direction of increased NOx emission. Improved coating and materials technologies along with creative combustor design can result in solutions to achieve the ultimate goal.

NONE

1997-06-01

445

Selection of the most advantageous gas turbine air filtration system: Comparative study of actual operating experience  

SciTech Connect

This paper discusses relative merits of three types of air filtration systems used by Sui Northern Gas Pipelines Ltd. (Pakistan), on its gas turbine compressor packages. These Filtration systems are: (i) Two stage inertial plus auto oil bath type multi-duty filters by AAF used on Saturn Mark-1 packages manufactured by Solar Turbines Inc. (ii) Three stage high efficiency barrier filters by AAF used on Centaur packages by Solar. (iii) Single stage pulse-jet self-cleaning filter by Donaldson again used on a Centaur package. The selection is primarily based in package performance data collected over a 15 month period analyzing power loss due to fouling effects and related operation and maintenance costs for the three systems. The Company's operating experience indicates that on new installations the pulse clean system offers the best advantage both in terms of filtration costs as well as availability of additional horse power when operating under moderate to severe environmental conditions.

Gilani, S.I.; Mehr, M.Z.

1985-01-01

446

SOFC-Gas Turbine Hybrid System for Aircraft Applications: Modeling and Performance Analysis  

NASA Astrophysics Data System (ADS)

There is a growing interest in fuel cells for aircraft applications. Fuel cells when combined with conventional turbine power plants offer high fuel efficiencies. The feature of fuel cells (SOFC, MCFC) used in aircraft applications, which makes them suitable for hybrid systems, is their high operating temperature. Their dynamic nature, both electrical and thermodynamic, demands a dynamic study of the complete hybrid cycle. In this paper we present a model for a SOFC/Gas Turbine hybrid system and its implementation in Matlab-Simulink. The main focus of the paper is on the dynamic analysis of the combined SOFC/GT cycle. Various configurations of the hybrid system are proposed and simulated. A comparative study of the simulated configurations, based on the first and second laws of thermodynamics, is presented. An exergy analysis for the chosen configuration is used to perform a parametric study of the overall hybrid system performance.

Srivastava, Nischal

2005-11-01

447

New Technology for Small Hydropower Installations.  

National Technical Information Service (NTIS)

A general discussion is presented of new technologies, both hardware and methodologies, that may be used in developing small hydropower installations. The primary source of information is the results of the R/D projects funded under the DOE Small Hydropow...

J. R. Chappell

1984-01-01

448

Hydropower utilization in New York State  

Microsoft Academic Search

A master inventory of hydropower sites in New York is reported. It includes: data on site identification, potential capacity, initial cost, cost per kWh and category class for development. Background information on the methodologies used to structure the inventory of hydropower sites and to rank selected site entries by development categories. An explanation of the economic assessment utilized in these

R. S. Brown; A. S. Goodman

1980-01-01

449

Status report: The US Department of Energy`s Advanced Turbine Systems Program  

SciTech Connect

ATS is poised to capture the majority of new electric power generation capacity well into the next century. US DOE led the programs supporting the development of ATS technology enabling gas turbine manufacturers to provide ATS systems to the commercial marketplace. A progress report on the ATS program is presented in this paper. The technical challenges, advanced critical technology requirements, and system configurations meeting the goals of the program are discussed.

Zeh, C.M.

1996-12-31

450

Fractional-order based droop control of an universal wind-turbine system  

Microsoft Academic Search

In this paper it is investigated the use of fractional-order controllers for an universal operation of small-power wind turbine system. Universal inverters should be able to work both connected to the grid both in island mode. Proper active\\/reactive control strategies are needed to get system work in universal operation. The aim of this paper is to investigate the use of

D. Ricchiuto; M. Liserre; R. Mastromauro; A. Dell'Aquila; A. Pigazo

2011-01-01

451

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

Microsoft Academic Search

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: {lg_bullet} System efficiency that will exceed 60%(lower heating value basis) on natural gas for large scale

Siemens Westinghouse

2001-01-01

452

Utility Advanced Turbine Systems Program (ATS) Technical Readiness Testing and Pre-Commercial Demonstration  

Microsoft Academic Search

The objective of the ATS program is to develop ultra-high efficiency, environmentally superior and cost competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Specific performance targets have been set using natural gas as the primary fuel: {lg_bullet} System efficiency that will exceed 60%(lower heating value basis) on natural gas for large scale

Siemens Westinghouse

2000-01-01

453

Adaptive regulation of the boiler-turbine unit of a Combined Heat and Power (CHP) system  

NASA Astrophysics Data System (ADS)

A simplified nonlinear model of a Combined Heat and Power (CHP) system is used to investigate the steady state errors, hunting phenomena and high interactions produced in the linear regulators currently employed in industry. In order to improve the regulation of the boiler turbine unit of the CHP system the gains of regulators should be changed adaptively according to the steam flow and valve position ratios and identical and fast acting servomotors should be chosen for the inlet and pass out values.

Karrari, M.; Nicholson, H.

1990-11-01

454

CAN-Bus Based Distributed Control System for Hydraulic Turbine Blade Repairing Robot  

Microsoft Academic Search

\\u000a A CAN-bus (Controller Area Network) based distributed control system was designed for a mobile on-site hydraulic turbine blade\\u000a repairing robot (HTBRR). The system is composed of one supervisory station, seven joint servo nodes, and four accessory nodes.\\u000a Visual image sensing, virtual reality and graphic based path planning are implemented on the supervisory station, to improve\\u000a tele-operation. Each joint servo node

Kangtai Xiang; Zhenguo Sun; Hongjun Dai; Qiang Chen; Jiajun Liu

2010-01-01

455

U.S. Hydropower Resource Assessment - California  

SciTech Connect

The U.S. Department of Energy is developing an estimate of the underdeveloped hydropower potential in the United States. For this purpose, the Idaho National Engineering and Environmental Laboratory developed a computer model called Hydropower Evaluation Software (HES). HES measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of California.

A. M. Conner; B. N. Rinehart; J. E. Francfort

1998-10-01

456

US hydropower resource assessment for Washington  

SciTech Connect

The U.S. Department of Energy is developing an estimate of the undeveloped hydropower potential in the United States. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Washington.

Conner, A.M.; Francfort, J.E.

1997-07-01

457

US hydropower resource assessment for Arkansas  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Arkansas.

Francfort, J.E.

1993-12-01

458

US hydropower resource assessment for Utah  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Utah.

Francfort, J.E.

1993-12-01

459

US hydropower resource assessment for New Hampshire  

SciTech Connect

The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of New Hampshire.

Francfort, J.E.

1995-07-01

460

US hydropower resource assessment for Wyoming  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Wyoming.

Francfort, J.E.

1993-12-01

461

US hydropower resource assessment for Rhode Island  

SciTech Connect

The Department of Energy is developing an estimate of the undeveloped hydropower potential in the United States. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Rhode Island.

Francfort, J.E.; Rinehart, B.N.

1995-07-01

462

US hydropower resource assessment for Louisiana  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Louisiana.

Francfort, J.E.

1993-12-01

463

US hydropower resource assessment for Wisconsin  

SciTech Connect

The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Wisconsin.

Conner, A.M.; Francfort, J.E.

1996-05-01

464

US hydropower resource assessment for New Jersey  

SciTech Connect

The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of New Jersey.

Connor, A.M.; Francfort, J.E.

1996-03-01

465

US hydropower resource assessment for Montana  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Montana.

Francfort, J.E.

1993-12-01

466

US hydropower resource assessment for Iowa  

SciTech Connect

The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Iowa.

Francfort, J.E.

1995-12-01

467

Proceedings of the Department of Energy advanced gas turbine central power systems workshop  

SciTech Connect

The basic objective of the DOE Central Power Systems group is the development of technology for increasing the use of coal in central station electric power generation in an economical and environmentally acceptable manner. The two major research and development areas of this program are the Open Cycle Gas Turbine System and the Closed Cycle Gas Turbine System. Recognizing that the ultimate success of the DOE program is measured by end-user acceptance of the technology developed, the workshop was held to obtain utility industry comments and suggestions on the development of these systems and their potential use by electric power utilities. Representatives of equipment manufacturers, architect and engineering firms, and universities were also invited as participants to provide a comprehensive review of the technology development and implementation process. The 65 participants and observers examined the following topics: technical considerations of the Open Cycle and of the Closed Cycle Gas Turbine program; commercialization of both systems; and regulatory impacts on the development of both systems. Each group evaluated the existing program, indicating R and D objectives that they supported and cited recommendations for modifications and expansion of future R and D work.

D'Angelo, S. (ed.)

1980-04-01

468

Analysis and numerical optimization of gas turbine space power systems with nuclear fission reactor heat sources  

NASA Astrophysics Data System (ADS)

A new three objective optimization technique is developed and applied to find the operating conditions for fission reactor heated Closed Cycle Gas Turbine (CCGT) space power systems at which maximum efficiency, minimum radiator area, and minimum total system mass is achieved. Such CCGT space power systems incorporate a nuclear reactor heat source with its radiation shield; the rotating turbo-alternator, consisting of the compressor, turbine and the electric generator (three phase AC alternator); and the heat rejection subsystem, principally the space radiator, which enables the hot gas working fluid, emanating from either the turbine or a regenerative heat exchanger, to be cooled to compressor inlet conditions. Numerical mass models for all major subsystems and components developed during the course of this work are included in this report. The power systems modeled are applicable to future interplanetary missions within the Solar System and planetary surface power plants at mission destinations, such as our Moon, Mars, the Galilean moons (Io, Europa, Ganymede, and Callisto), or Saturn's moon Titan. The detailed governing equations for the thermodynamic processes of the Brayton cycle have been derived and successfully programmed along with the heat transfer processes associated with cycle heat exchangers and the space radiator. System performance and mass results have been validated against a commercially available non-linear optimization code and also against data from existing ground based power plants.

Juhasz, Albert J.

469

Optimizing Dam Operations for Power and for Fish: an Overview of the US Department of Energy and US Army Corps of Engineers ADvanced Turbine Development R&D. A Pre-Conference Workshop at HydroVision 2006, Oregon Convention Center, Portland, Oregon July 31, 2006  

SciTech Connect

This booklet contains abstracts of presentations made at a preconference workshop on the US Department of Energy and US Army Corps of Engineers hydroturbine programs. The workshop was held in conjunction with Hydrovision 2006 July 31, 2006 at the Oregon Convention Center in Portland Oregon. The w