A lithium bromide absorption refrigerating machine, using a water solution of lithium bromide as the

Because the absorption refrigeration system uses the Lithium bromide- water solution as refrigerant, it is profitable for the environment that human beings are living since the values of ODP and GWP of the refrigerant almost are zero. However, the low COP of the absorption ...

Requirements for cooling are related to the need to be able to maintain foodstuffs in good condition with the aid of refrigeration and the desirability to provide a comfortable indoor environment by air conditioning. The representation of the desired conditions in a room by a point on a psychrometric chart is considered together with processes of sensible cooling, cooling and ...

We look at the operation of compression/absorption cycle machines in order to produce a high-temperature heat pump. The useful effect of the machine lies in the absorber during absorption of vapour with a high refrigerant content by the solution with a lo...

An air conditioning system making use of waste heat is described comprising a compound absorption refrigeration machine and absorption type heat pump for both cooling and heating. The refrigeration machine and the heat pump are connected in parallel to the load to obtain ...

The thermodynamic properties of the R22- N,N-dimethylformamide system and the R22- isobuthylacetate system were measured in order to decide whether or not these mixtures were suited for absorption refrigeration. The specific gravity, the viscosity, the su...

A lithium bromide absorption refrigerating machine, using a water solution of lithium bromide as the working substance, is briefly described and illustrated by a line diagram and s-t diagram. The machine operation is analyzed as a two-cycle system: the di...

...machines in the engineroom space unless the arrangement is such as to eliminate any hazard from gas escaping to the engineroom. Absorption machines using a solution of aqua ammonia and machines using carbon dioxide are exempt from this requirement, provided...

A theoretical analysis was undertaken to examine the efficiency characteristics of acetone-zinc bromide solutions for an absorption refrigeration machine, using low generator temperatures (47 60�C), which allows the use of flat plate solar collectors. The results of the simulation were confirmed with an experimental investigation. ...

This article describes lithium bromide absorption refrigerating machines (LBARMs) designed for use in mine air-conditioning systems (MACS). The application of LBARMs in MACS is difficult due to the elevation of temperature of the cold carrier when supplied to the mine air refrigerants. A thermodynamic and ...

Three solar-powered cooling concepts are analyzed and evaluated. These are: (1) the solar Rankine concept in which a Rankine cycle driven by solar energy is used to drive a vapor compression refrigeration machine, (2) the solar-assisted Rankine concept in which a Rankine cycle driven by both solar energy and fuel combustion is used to drive a vapor ...

The gas-fired domestic refrigerator is a successful gas-fired appliance which fills a market niche where either low noise or independence from electric power is important. Such applications include hotel room refrigerators, recreational vehicles and remote area refrigeration. Current diffusion-absorption ...

An absorption refrigeration system utilizing a low temperature desorber and intermediate temperature resorber. The system operates at three temperatures and three pressures to increase the efficiency of the system and is capable of utilizing a lower generator temperature than previously used.

A mathematical model of a single and a two stage solar absorption regrigeration system is developed in which data of collectors and weather data can be implicated. The influence of the generator, the absorber efficiencies, and the cooling temperature on t...

Absorption systems have two major applications: first, in refrigeration and air conditioning engineering, where the are used for absorption refrigeration machines and heat pumps, and secondly in the chemical industry, where they are used in particular for...

Absorption chillers are heat-operate refrigeration without harmful environmental emissions (CFCs, HCFCS, and HFCS). The machine uses either steam or a gas-fired burner as the energy source and utilizes endothermic evaporation to provide refrigeration to an external process fluid, usually chilled water. In the ...

Absorption refrigeration systems are one of the oldest systems available. The fundamentals of absorption refrigeration were formulated about 1777, and the first successful absorption machine was developed in 1850. The first U.S. patent for an absorption ...

Every solar refrigeration process suitable for arid land must work with an air cooled condenser and absorber. It is shown that such equipment can be made by adapting commercially available absorption machines to concentrators presently developed. Solar absorption cooling is compared to solar cooling with Rankine ...

The report analyses how production of district cooling is affected by the choice of cooling method and refrigerant. Three different cooling methods are analyzed, i.e. the compressor, absorption, and cold air machines. Performance calculations and quality ...

... Accession Number : AD0762261. Title : The Calculation of (Piston) Gas Refrigerating Machines and Heat Engines,. Corporate ...

... Accession Number : ADD454786. Title : REFRIGERATED CUTTING TOOLS IMPROVE MACHINING OF SUPERALLOYS. Corporate Author : ...

In an era of heightened awareness of energy efficiency and the associated environmental impacts, many industries, worldwide, are exploring ``environmentally friendly`` technologies that provide equivalent or improved performance while reducing or eliminating harmful side effects. The refrigeration and air conditioning industry, due to its reliance on CFCs and HCFCs has ...

In summer absorption refrigerating machines provide cold water using excess heat from municipal thermoelectric power plant through district heating pipelines, which reduces peak electric load from electricity networks in summer. The paper simulates annual dynamic load of a real project to calculate the first investments, annual ...

The study deals with a solar system for refrigeration specially designed for remote areas. The thermodynamic cycle, using an ammonia-water absorption, only consumes thermal energy and is easy and cheap to produce by direct conversion of solar radiation. I...

The authors describe the design and operation of absorption lithium bromide refrigeration units (ALBRU). They give special attention to devices for controlling the flow rate of heat carrier to the generator, the exact output of the unit, the reduction of hydraulic losses, and the economy of operation and production of the machines. ...

... Accession Number : AD0276467. Title : MECHANICS OF HEAT PUMPS AND ABSORPTION REFRIGERATION: AN ANNOTATED BIBLIOGRAPHY. ...

The study examined commercial refrigeration equipment (supermarkets, refrigerated vending machines, beverage merchandisers, reach-in and walk-in refrigerators and freezers, and ice machines). Baseline energy use, potential energy savings, and the economic...

Previous papers have dealt with the comparisons of absorption and centrifugal chillers and indicated the benefits of using absorption machines. Also, the ideal thermodynamic performances and limitations of absorption cycles have been derived. Nevertheless, the need to update this recent work is necessary for ...

In most commercial machines, absorption enhancement has been done by adding small various kinds of surfactants, thereby reducing the surface tension of the absorbent solution and generating Marangoni convection near the solution surface during the refrigerant vapor-absorption process. This paper clarifies the most ...

The refrigeration system for the generator has been designed in cooperation with the manufacturer of generators. The requirements for the refrigerator have been fixed. The basic engineering, including the specifications of machines and apparatus, and a re...

The book presents the fundamental principles, systems, and practices of refrigeration. Emphasizing energy conservation, it offers applications of the refrigeration systems and equipment. Topics covered include: physical principles; the vapor compression refrigeration system: Pressure-enthalpy diagrams; thermodynamics of the vapor ...

This book is a fundamental text on refrigeration principles, equipment, and systems. Energy utilization and conservation are stressed. Extensive use is made of tables, charts, and worked-out examples. Contents, abridged: Physical principles. Heat transfer in refrigeration: evaporators. Absorption refrigeration. ...

PROJECT TITLE : Single Machine for High Efficiency Cryocooling, Refrigeration, and Heat Pumping Applications. TECHNICAL ABSTRACT (LIMIT 200 WORDS) ...

It is shown that the inertia of a solar refrigerator depends on the heat capacity of the working solution contained by it. Various combinations of refrigerants are tested. 7 references.

The corrosion of metals and alloys in absorption refrigeration fluids has received little attention except for the behavior of steel and copper alloys in aqueous lithium bromide solutions. This report presents results of short-term corrosion tests on several materials in lithium bromide solutions as well as in other fluids of potential interest in advanced ...

A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only after expiration of a preselected time period measured from the sensed shutdown of ...

A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only after expiration of a preselected time period measured from the sensed shutdown of ...

Absorber is an important component in vapor absorption refrigeration system and its performance has greater influence in overall efficiency of absorption machines. Falling film heat and mass transfer in an absorber is greatly influenced by fluid properties, geometry of heat exchanger and its operating parameters. ...

This invention presents the device and method for cooling electric machines with hot liquid refrigerant in a floating refrigerant loop and using an internal liquid such as oil for enhancing the cooling effects. The electric machine cooling apparatus has a...

This study concerns feasible improvements of heat pumps and refrigeration machines based upon the evaporation process. Improvements here mainly refer to higher thermal/refrigerant coefficients. Some thermodynamic improvements are discussed such as: Reduct...

This report describes the development of an ultraminiature, Vuilleumier (VM) cycle, cryogenic refrigeration system for infrared type systems. The refrigerator that was designed and fabricated is a liquid cooled machine producing 0.75 watt of refrigeration...

This thesis includes three parts. (1) Construction of a study alternating refrigerator. This is essentially a double acting machine, with ancillary refrigeration by helium expansion. This refrigerator operates in a liquid helium bath at 4.2 K and the cold...

The construction of a study alternating refrigerator, essentially a double acting machine, with ancillary refrigeration by helium expansion is discussed. The refrigerator operates in a liquid helium bath at 4.2 K and the cold surface is a superfluid bath ...

... discussed. The appiances reviewed include refrigerators, washing machines, dishwashers, freezers and clothes dryers. ...

... He became a pioneer in the field of air conditioning and refrigeration by inventing a machine that made ... ...

...refrigerated bottled or canned beverage vending machines. 431.292 Section 431.292 Energy...Refrigerated Bottled or Canned Beverage Vending Machines § 431.292 Definitions concerning...refrigerated bottled or canned beverage vending machines. Basic model means, with...

Refrigerating machine oil to be filled in a sealed motorcompressor unit constituting a refrigerating cycle system including an electric refrigerator, an electric cold-storage box, a small-scaled electric refrigerating show-case, a small-scaled electric cold-storage show-case and the like, is ...

A cogeneration system is a slave to two masters - steam and electric power. Refrigeration service, on the other hand, is provided either by electricity, which drives a compressor, or by thermal energy, from which available energy is extracted to perform useful work as in the absorption refrigeration machine. As a ...

The refrigerated trailer and container segments of the transportation industry are evaluated as potential entry markets for a proposed absorption refrigeration technology. To perform this analysis the existing transportation refrigeration industry is char...

The determination of properties of zeolite/refrigerant combinations of solar refrigeration systems are reviewed in this final report. The US DOE has funded several studies aimed at identifying potential rerigerant/absorption pairs for solar cooling applic...

The bibliography contains citations of selected patents concerning the design and application of absorption refrigeration systems. Citations cover refrigeration, cooling/heating, and chilling devices. Combination heat pump/absorption and mechanical/absorption refrigeration ...

The authors describe the loss of compression and the corrosion caused by the high moisture content of compressed air used in refrigeration. They describe the construction and operation of machines that dry this air by cooling it to dew point and separating the moisture. They offer a chart that sets forth the operational parameters of these ...

Absorber is an important component in absorption machines and its characteristics have significant effects on the overall efficiency of absorption machines. This article reports a model of simultaneous heat and mass transfer process in absorption of refrigerant vapor into a ...

Refrigeration compatibility is reduced to the consideration of the materials ... For applications involving domestic refrigeration and heat pumps, the free-piston ...

This report gives a short introduction to the principles of absorption refrigeration plants. A measuring program for a large lithium bromide-water absorption refrigeration plant has been conducted during the summer 1987 at Herlev Hospital. The plant is dr...

The analyses of absorption refrigerating machines, absorption heat pumps, and absorption heat transformers require thermal and physical properties for working medium + absorbent systems. The enthalpy of mixing data for working fluids are one of the most important basic properties for the ...

Because the severe conditions imposed by ambient temperatures on solar refrigeration equipment in the tropics limit the choice of an absorption system, the thermokinetic characteristics of a calcium chloride/ammonia absorption cycle were examined. The refrigeration equipment employed works in two stages: ...

... is now no mechanism for energy absorption and thrust ... the over-water and over-land machine and the ... GE because it is thought that machines of the ...

... cylinder of aluminum which was machined to give a ... The classical absorption was subtracted ... in the section on specific heats, The characteristic ...

The report describes the development of a Vuilleumier (VM) cycle, cryogenic refrigeration system for forward looking infrared (FLIR) type systems. The refrigerator that was designed and fabricated is a liquid cooled, two-stage machine composed of the refr...

Monitoring solution concentration in lithium bromide absorption units is of great importance to improve the thermal efficiency and the controllability of the units. The conventional way to measure concentration in lithium bromide water absorption machines...

The report presents the test results on two inorganic compounds chosen as environmentally safe alternatives to the sodium chromate corrosion inhibitors that is currently used to protect carbon steel surfaces in ammonia/water refrigeration machines. At the...

Solar-Powered Refrigeration can help people in the developing countries to reduce a tremendous loss of foodstuffs because of lacking preservation facilities. Also for the preservation of medical supplies, especially vaccine, refrigeration is urgently need...

... compressors; Centrifugal compressors; Gas refrigeration and expansion machines; Reciprocating compressed gas engines; Turbine compressed ...

... household refrigerators and washing machines to typewriters, kidney dialysis and industrial drilling machines and scores of other commercial products. ...

An air-cooled, vertical tube absorber for an absorption refrigeration system is disclosed. Strong absorbent solution is supplied to the top of the absorber and refrigerant vapor is supplied to the bottom of the absorber to create a direct counterflow of refrigerant vapor and absorbent solution in the absorber. The ...

... machines, Van de Graff machines, linear accelerators ... not contain cost information for machine down time ... assuming 100-percent absorption of the ...

The method described is for the removal of oils accumulating in a liquid refrigerant and for returning the refrigerant system. This method is particularly applicable to the process of recovering natural gasoline from natural gas by refrigeration and absorption. A small stream of the liquid ...

The absorption refrigerator can be considered a thermal transformer, that is, a device that is analogous to the electric transformer. The analogy is based on the correspondence between the extensive quantities, entropy and electric charge and the intensive variables, temperature and electric potential. (Contains 1 footnote and 6 figures.)

This report describes the modifications and repairs made to the 200 ton absorption refrigeration pilot plant since April 1992, when Clarkson University assumed responsibility for it. Current operating problems and the performance of the plant, achieved to...

The first step in the economic analysis of the integration of geothermally powered absorption refrigeration into a food processing plant was an evaluation of the potential geothermal sites in the Western United States. The evaluation covered availability ...

A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is ...

A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is ...

Among major components of LiBr�H2O absorption chillers is the absorber, which has a direct effect on the chillier size and whose characteristics have significant effects on the overall efficiency of absorption machines. In this article, heat and mass transfer process in absorption of ...

... calculation for timeline for degradation of the ... ineffectiveness of the CO2 absorption units was ... conditioners, refrigerators and chillers; ingredient in ...

The diffusion-absorption heat pump (DAHP) offers advantages including no moving parts, noise and vibration free operation and operation without electric power. An example of such a cycle is the gas-fired domestic refrigerator. The cycle is similar to an absorption cycle but differs in that an auxiliary gas is used to equalize the ...

An absorption refrigeration system has an intermediate temperature desorber-resorber pair. A valve between the desorber-resorber pair is modulated to control the capacity for load matching.

An absorption refrigeration system has an intermediate temperature desorber-resorber pair. A valve between the desorber-resorber pair is modulated to control the capacity for load matching.

A solar-powered absorption refrigeration apparatus is described comprised of: (a) a pressure vessel of approximately circular cross-section for containment of a liquid absorbent solution containing absorbed refrigerant; (b) a solar-radiation reflector for concentrating solar radiation onto the pressure vessel; (c) a condenser for ...

After the final run of the Large Electron Positron Collider, the four refrigerators used for LEP were free to be used for the Large Hadron Collider project. In order to serve the LHC requirements, these four Ex-LEP refrigerators needed to be modified and upgraded. In this paper we present the requirements for these refrigerators ...

An absorption refrigeration and/or heating system is described, comprising: a desorber which absorbs heat and a high relative pressure vaporizes a first volume of refrigerant from a second volume of strong solution leaving a third volume of weak solution; a condenser which releases and condenses the vapor ...

Invention and design of the gas absorption refrigerator of Servel, Inc. "Servel, Inc., the sole manufacturer of gas absorption refrigerators since 1926, introduced the Wonderbar, a compact portable refrigerator designed by industrial designer and Servel VP of Product Planning, Donald Dailey. ...

Solar icemaking is a logical technology for developing countries. If solar radiation is harnessed for cooling purposes, the peak supply of useful energy will generally coincide with peak demand for refrigeration, while the use of the solar cooling effect to produce ice will provide energy storage during low radiation periods. This report provides a brief history of ...

During the compatibility study of 10 pure refrigerants with 24 motor materials, it was observed that the greatest damage to the insulation system was caused by absorption of refrigerant followed by rapid desorption. The observed effects were blisters, cracking, internal bubbles and delamination. Measured results includes decreased bond ...

... and thus -: no anoialous ,absorption was detected in ... Another machine distinguishes numbers ... In Moscow and other large cities machines control the ...

... a fatigue test, on machined test specimens or ... In this region of maximum energy absorption Ar will ... accomplishes the two objectives for this machine: ...

This paper deals with the basics of cryocoolers and related thermodynamic systems. The treatment is based on the first and second law of thermodynamics for inhomogeneous, open systems using enthalpy flow, entropy flow, and entropy production. Various types of machines, which use an oscillating gas flow, are discussed such as: Stirling refrigerators, GM ...

This paper deals with the basics of cryocoolers and related thermodynamic systems. The treatment is based on the first and second law of thermodynamics for inhomogeneous, open systems using enthalpy flow, entropy flow, and entropy production. Various types of machines, which use an oscillating gas flow, are discussed such as: Stirling refrigerators, GM ...

... EMPIRICAL CORRECTIONS FOR VARIABLE ABSORPTION OF SOFT X ... section was then machined to fit ... for other peak characteristic radiations of ...

The objectives of the research reported is to develop and analyze new concepts for absorption cycles to improve the performance or reduce the cost of a 3-ton absorption chiller that can be used with solar collected heat. New refrigerant-absorbent pairs are investigated, as are additives to currently used ...

A new absorption cycle, using heat as the energy source, was proposed to produce refrigeration. This proposed cycle, referred to as the single-effect regenerative absorption cycle or cycle 1R, has a performance much superior to the well-known basic absorp...

A major reserve for savings in manufacturing is the use of secondary energy resources (SER) to produce refrigeration in absorption refrigeration units (ARU). One possible field of application of refrigeration is the development of the required vacuum in vacuum towers. This paper proposes a scheme for the production ...

Sessions included: HFC blown polyurethanes, carbon dioxide blown foam and extruded polystyrenes, plastic foam insulations, evacuated panel insulation, refrigeration and air conditioning, absorption and adsorption and stirling cycle refrigeration, innovative cooling technologies, and natural refrigerants. Selected ...

Computer programs that determine the basic characteristics of heat pumps for different refrigerants and the interference between refrigerant and oil, and especially reciprocating compressors for heat pumps, are presented. The influence of electric-motor cooling, lubrication, different refrigerants, speed control and partial-load ...

Heat energy is supplied to the hot volume of a Vuilleumier cycle cryogenic refrigerator, or to a Stirling cycle heat engine, with and by the inventive heater module which is disposed within the hot working volume of the machine. The heater module is in co...

the same energy signature at different times. However, as we will show in the next section, this extension appliances, washing machine and dryer, refrigerator and freezer, dish- washer, heating). In many cases, certain devices like the refrigerator, washer/dryer, and computer are predicted quite

Continued use of chlorofluorocarbon (CFC) refrigerants may have a severe financial as well as operational impact on the users of air-conditioning and other refrigeration equipment as price increases continue and production is phased out. With production o...

The purpose of this program was to develop a quiet, vibration-free long-life, lightweight Stirling cycle refrigerator capable of producing 1 W of cold at 77K while in a still air environment at 125F. The total power consumption of the machine was restrict...