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

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

This disclosure documents the invention of adapting an economizer and an air heater to an absorption heat pump. The heat pump will have as its prime source of power, heat generated from burning a source of fuel. The air used in the burner will be heated ...

Conserve Resources, Incorporated is currently developing an innovative, patented absorption heat pump. The heat pump uses rotation and thin film technology to enhance the absorption process and to provide a more efficient, compact system. The purpose of t...

Conserve Resources, Incorporated is currently developing an innovative, patented absorption heat pump. The heat pump uses rotation and thin film technology to enhance the absorption process and to provide a more efficient, compact system. The purpose of t...

An analysis of alternative approaches to the use of solar energy for heating applications is presented. Three heat pump configurations are considered as alternatives to direct heat exchange. These are two configurations of a vapor compression heat pump driven by a ...

Absorption heat pumps are a viable technology for waste heat recovery in industry. Yet, no US applications exist to date. In sharp contrast, large scale heat pumps are used in Japan, and a few recent installations have been reported in Europe. This paper ...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium.

Gas fired absorption heat pumps for space conditioning (heating and air conditioning) are being developed by several US organizations. Single-effect cycle absorption heat pumps for residential applications were developed in the 1970's, but ...

A mathematical model of the steady-state performance of an absorption heat pump is described. The model is compared with experimental data from a residential-sized water chiller. It is also used to determine the sensitivity of the heat pump performance to...

A statistical model of an absorption heat pump for the indoor bath at Ystad is presented. Measurement were made under realistic operational conditions. Equations, experimental and physicaal data were used to describe the heat pump. Working fluids were LiB...

... I The absorption and desorption properties of metal hydrides are determined ... The small difference between the absorption and desorption ...

Conserve Resources, Incorporated is currently developing an innovative, patented absorption heat pump. The heat pump uses rotation and thin film technology to enhance the absorption process and to provide a more efficient, compact system. The purpose of this report is to ...

Conserve Resources, Incorporated is currently developing an innovative, patented absorption heat pump. The heat pump uses rotation and thin film technology to enhance the absorption process and to provide a more efficient, compact system. The results are presented of a ...

The presentations covered a wide range of subjects and included: heat engine driven heat pumps; free piston compressors; ground heat transfer and extraction and ground heat; absorption cycle heat pumps; process ...

The systems approach to heating and cooling is considered in terms of the collectors, heat storage, heat pumps, air cooling absorption units, heat exchangers, circulating devices, and controls. (WDM)

Absorption cycles like the absorption heat pump or the absorption heat transformer can contribute to savings on one of the earth's resources, energy. Because of the high initial expenses, application of an conventional absorption apparatus is only ...

Absorption cooling using a LiCl/water heat pump can enable lightweight and effective thermal control

The concept of a thermal powered absorption heat pump is not a new or revolutionary idea. It has been successfully demonstrated in the lab and prototypes have been installed in the field. Units have been successfully applied in a number of industrial and commercial installations. Even more has been written about ...

There are at least six major types of equipment that upgrade waste heat: (1) thermocompressor; (2) electric drive compressor heat pump; (3) absorption heat pump; (4) high temperature heat powered compressor heat ...

A description is presented of the possible uses of heat pumps for space and water heating applications in houses in the UK. In the UK the only heat pumps sold of a size suitable for domestic heating applications are compression cycle electrically driven devices. The ...

The objective of this work has been to investigate suitable applications for large absorption heat pumps and to suggest suitable sites for trial installations as part of the program of research work of the Swedish Council for Building Research. The two fo...

This book contains nine sections, each consisting of several papers. Some of the paper titles are: A large absorption heat pump; Integration of natural gas engine driven vapor recompression heat pumps into industrial processes; Heat pump applications ...

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 ...

An air conditioning system is described utilizing low temperature heating sources of the environment to maximize the heat coefficient of performance by conserving subterranean heat, atmospheric heat, solar heat, and auxiliary heat sources in combination with a ...

The development of energy efficient, thermally activated heat pumps for heating and cooling is reported. A breadboard system with a 32.5%-BHP-efficient linear engine in the final phase of steady state was tested. The absorption heat pump advanced cycle program is in ...

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 ...

Heat transformers are absorption heat pumps that boost the temperature of industrial waste heat. Solutions of lithium bromide-water are commonly employed in heat transformers. Although these solutions have many desirable properties, they exhibit a drawbac...

Incentives for the development of gas heat pumps are discussed. Technical progress made on several promising technologies was reviewed. The status of development of gas-engine-driven heat pumps, the absorption cycle for the near- and long-term gas heat ...

In the near future, heat pumps will start to flood the heating market. More generally, a market of systems usable for both heating and cooling is beginning to impose itself. This can be achieved by vapor-compression cycles, absorption cycles or others. Th...

The object of the research work was to demonstrate that a water source heat pump could be used with an earth-coupled heat exchanger which was buried in an absorption field of a domestic sewage disposal system to provide the heating and cooling requirement...

The general acceptance of the absorption heat pump has been hampered so far by the fact that only ammonia/water and water/lithium bromide were used as working fluids. Systematic research into suitable pairs of working fluids has become possible with new t...

A series of laboratory performance tests were conducted on an absorption cycle water chiller and heat pump. The part-load performance was compared to the full-load capacity and coefficient of performance. The causes of performance degradation with shorter...

The diffusion-absorption heat pump 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 absorpti...

Battelle Columbus Laboratory (BCL) has developed a Lithium Bromide-Water absorption heat pump, called the Battelle Temperature Booster (BTB), by modifying an absorption chiller made by Carrier Corporation. The BTB demonstration unit was designed to take e...

... We have performed the first studies of femtosecond carrier heating and spectral ... to predict measurements of pump and probe gain and absorption ...

A theoretical and experimental study has demonstrated that an absorption heat pump with a water-lithium bromide thermodynamic couple has a practical coefficient of performance of 1.4-1.6 when providing a 280/sup 0/F heat source. The ability to serve as a high-temperature heat source makes this ...

In this paper, the equivalent combined systems of three-heat-source heat pumps are studied. It is pointed out that there may be three combined ways for us to conceive a reversible three-heat-source heat pump as a combined system having a reversible Carnot ...

An evaluation of the technical and economic feasibility of coupling an absorption heat pump and an active solar system for residential applications is discussed. The absorption heat pump is based on a new absorption working pair developed by Allied. ...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium. A ...

Operational circumstances of heat pump systems for industrial use were widely investigated to open their successful cases in practical applications to the public and to widely spread them throughout the industrial sector. As a summary of questionaire totaled 144 cases, 79 cases were motor-operated heat pumps, 37 ...

A second volume containing the appendices to the report on the development of high efficiency vapor compression cycle heat pumps for use in solar assisted heat pump (SAHP) systems is presented. A water source heat pump and a solar powered absorption ...

Advanced active carbon fibre/NH3 heat pumps with dual sources of energy (solar/gas) were developed for providing space heating, cooling and sanitary hot water for buildings. The next heat pump generation will include a combination of chemicals with an active carbon fibre to increase the NH3 ...

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...

In comparison with conventional absorption heat pump processes the solid and porous zeolite adsorber permits a simpler and a more advantageous procedure. The operation of a zeolite adsorption cycle is illustrated in Figure 1. The entire system consists of...

The working fluids used in absorption refrigeration processes are generally not appropriate for sorption heat pumps and heat transformers. The research program aims at the investigation of more suitable working substances. A selection of possible working ...

The objectives of these programs are to accelerate the development of energy-efficient, thermally activated heat pumps for heating and cooling. At this time, one subcontractor (Tectonics Research) is actively continuing the efforts started in the Honeywel...

The aim of the study is the numerical simulation and experimentation of the application of the zeolite-water couple, to a heat pump for industry or housing, using a high temperature heat source. The study includes modelling and description of the equipmen...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use, as the heat transfer medium, the working fluid of the absorption system taken from the ...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use, as the heat transfer medium, the working fluid of the absorption system taken from the ...

An absorbtion cold and warm water system utilizing solar heat is disclosed. Heat source water is obtained by heating water by the solar heat and a main heating source. The system is selectively made to function as a warm water system, a first heat pump ...

The thermodynamics of energy conversion through heat-activated heat pumps are described. Some practical systems, heat performances and recent developments in this field are discussed. A distinction is made between processes which depend on the transfer of mechanical energy and systems that are characterized by the ...

Advanced technologies for gas-fired absorption heat pumps for building space conditioning (heating and/or air conditioning) are being developed with the US Department of Energy support. Single- effect cycle absorption heat pumps for residential ...

technologies including thermoacoustics, metal hydride heat pumps, zeolite systems, absorption refrigeration, and thermoelectrics. Thermoacoustic Technique A promising device...

A brief overview of integrated resource planning (IRP) is provided, with emphasis on how stakeholders interact within the process and where the opportunities may lie for heat pump advocates in cold climates. Five heat pump options that represent various approaches for improving heat ...

Absorption heat pumps are a viable technology for waste heat recovery in industry. Yet, no U.S applications exist to date. In sharp contrast, large scale heat pumps are used in Japan, and a few recent installations have been reported in Europe. This paper presents a ...

The RD&D program has resulted in design, development and testing of a packaged prototype double-effect generator cycle absorption gas heat pump for the residential and small commercial markets. The 3RT heat pump prototype has demonstrated a COPc of 0.82 a...

The performance of three combined absorption/vapor compression cycles for gas-fired internal combustion engine driven heat pumps was assessed in a theoretical study. Two cycles were selected for the preliminary design of breadboard systems using only off-...

A residential-sized (25KW) absorption heat pump has been developed using organic absorption pairs. Several different absorption pairs were examined duing the course of the program. The final choice was R123a (CClF sub 2 CHClF) as the refrigerant and ETFE ...

The objective is research, development and demonstration of a double-effect generator cycle absorption heat pump for the residential and small commerical markets. A 3RT advanced breadboard air-to-air reverse cycle heat pump was designed, fabricated and tested and the ...

A second volume containing the appendices to the report on the development of high efficiency vapor compression cycle heat pumps for use in solar assisted heat pump (SAHP) systems is presented. A water source heat pump and a solar powered absorption ...

The US Department of Energy (DOE) is working with partners from the gas heating and cooling industry to improve energy efficiency using advance absorption technologies, to eliminate chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), to reduce global warming through more efficient combustion of natural gas, and to impact electric peak demand ...

Absorption heat pumps of the type analyzed here provide process heat from waste heat. A simulation model with optimization capability is now operational for an advanced sodium hydroxide-water absorption heat pump with a regenerative ...

Increasing interest in absorption heat pumps has led to research on new working fluids. In this work, the thermodynamics of binary solutions is applied to a simple heat pump model to determine which type of solution optimizes thermal performance for a given refrigerant (ammonia). It is found ...

A computer simulation program for absorption systems has been developed in a flexible and modular form, which makes it possible to simulate various configurations with different working fluids. The user supply input containing information about given flow...

The optimal design study was carried out on district heating and air-conditioning system which employs an absorption heat pump to upgrade secondary coolant heat. Furthermore this report treats on the process inherently safe reactor and a design model has ...

Absorption of heat at 2 K and heat rejection at 10 K in this fully static ... The TCS incorporates an advanced high efficiency, heat pump to reject waste heat from ... Moody friction charts and the analytical Darcy-Weisbach equation. ...

Performance comparisons were made between direct solar heating, solar powered vapor compression and gas absorption heat pumps, electric resistance heating, and combustion furnace heating; seasonal resource energy consumption for a Philadelphia single-fami...

The absorption heat pump presents because of its simple construction an apparatus which meets in an excellent way the requirements of a heating device for small size domestic heating systems with the possibility of the reduction of the primary energy cons...

The state-of-art in ammonia-water absorption cooling has been applied to an air-source heating-only heat-pump cycle which delivers its heat indoors via circulating liquid. The cycle is described, differences from the cooling application noted, and test results on a 14.65-kW (50,000 Btuh) input unit reported.

Test and rating procedures are presented for gas-fired absorption devices operating in either the heating or cooling modes. These procedures are designed to include the effects of part-load and cyclic operation, variations in outdoor temperature, and frost formation during the heating mode. Both air-source and ground water source ...

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the ...

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the ...

A schematic of the solar energy system and the HVAC equipment is shown. A paraffinic oil is circulated through the collector array and exchanges heat to water in a tube or shell heat exchanger. Hot water is pumped to either a Rankine cycle or absorption unit. The two systems are compared. (MOW)

Absorption heat pumps have received renewed and increasing attention in the past two decades. The rising cost of electricity has made the particular features of this heat-powered cycle attractive for both residential and industrial applications. Solar-pow...

Many thermally activated heat pump systems are being developed along technology lines, such as, engine-driven and absorption heat pumps. Their thermal performances are temperature dependent. Based on the temperature-dependent behavior of heat pump cycle ...

After a recall on the principle of an absorption heat pump, the working under partial loading has been considered with three types of control: control of the power supplied to the separator, the same control involving in addition a modulating valve with three paths in order to regulate the flow rate of the solution at the entrance of ...

A model for calculation of stored energy and heat source assessment in a laser crystal has been developed. We report that in a pulsed laser amplifier using Yb:YAG slabs at low temperature with ASE suppressing MLD absorptive layer, 58% of the pump energy is deposited as heat and has to be cooled, while only 11% of ...

This patent describes an absorption refrigeration and/or heating system in connection with a primary source of heat, a cooling or heating load, and a heat sink or secondary source, to selectively provide heat to or remove heat from the load, including ...

The invention is directed to a solar heat control device for either transferring solar heat to, or diverting it away from a heat transfer fluid depending on the time of year. The solar heat control device is adapted to be used in a novel heating, cooling, lighting and ventilating system which ...

Introductory remarks by the chairman of the workshop; Current and historical heat pump activities in Belin; Absorption heat pump and working pair developments in Europe until 1974; Overview and history of absorption fluid developments in the USA(1927-1974...

The diffusion-absorption heat pump (DAHP) offers advantages including no moving parts, noise and vibration free operaton 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 ...

A model has been developed for the design and optimization of a small bubble pump to be used in a single pressure absorption refrigeration cycle to lift the working fluid mixture against gravity and overcome flow friction. This analytical model is developed from two-phase flow fundamentals and incorporates the design parameters of the bubble ...

A solar assisted heat pump is described and illustrated. The operation of the heat pump is explained. (WDM)

technologies including thermoacoustics, metal hydride heat pumps, zeolite systems, absorption refrigeration, and thermoelectrics. A major part of our research focuses on the...

... and no wall effects or partial probe beams in the ... The hybrid DPAL system combines efficient diode pumping with the good beam quality and ...

... Beer's law for the heat generated from absorption per unit length through ... field, in this case it was placed 117 cm from the pump beam focusing lens. ...

The Federal Ministry for Research and Technology has supported a development program in which a demonstration plant integrated in the Saar district heating grid will be built. This plant will help to gain operational experience o an industrial scale and t...

Solar cooling for commercial applications using open cycle absorption refrigeration systems was investigated. If an open cycle absorption can be operated as a chemical heat pump for winter heating operation, the system offers year round operation that makes the system economically viable for ...

A method of defrosting a multiple effect absorption refrigeration and heating system having means for switching a refrigerant flow from a second heat exchanger operating as a condenser in the heating mode to a first heat exchanger operating as an evaporator in the heating ...

Heat pump systems for recovering waste heat are considered. To compare different cycles on a consistent basis, a definition of performance based on the Second Law of Thermodynamics is presented. A high-grade heat-actuated cycle that uses a steam ejector is analyzed, but no substantial development effort is ...

Chemical heat pumps are mechanically driven heat pumps with working fluids that undergo chemical changes or are heat-driven heat pumps in which either the driver (heat engine) or heat pump ...

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 systems are included. ...

The object of the research work was to demonstrate that a water source heat pump could be used with an earth-coupled heat exchanger which was buried in an absorption field of a domestic sewage disposal system to provide the heating and cooling requirements for residential use in an energy ...

In this investigation, an absorption water chiller and absorption heat pump were extensively tested under steady-state and cyclic operating condtions. Since the tests were performed on two different units, one for a cooling only and one for a heating only...

There is now a new and highly economic technology available for saving energy in petroleum refineries. This technology--absorption heat pumping--is gaining rapid acceptance overseas, but to date is relatively unknown and untried in the U.S. Packaged units now can be supplied in virtually any capacity rating desired. These units are ...

The development and proof testing of advanced absorption refrigeration cycle concepts is reported. The purpose is to develop a gas fired absorption heat pump for residential and small commercial applications that will produce a coefficient of performance of at least 1.6 Btu heating and .7 Btu ...

Surfactant additives have been known for some time to influence the boiling characteristics of water and water-salt solutions. An enhancement of boiling transfer coefficients can be obtained by a proper choice of additives. When the capacity of an absorpt...

In this investigation, an absorption water chiller and absorption heat pump were extensively tested under steady-state and cyclic operating condtions. Since the tests were performed on two different units, one for a cooling only and one for a heating only application, the report is set up in ...

, GAX cycle, dual-fired generator, indirect fired generator, solar heating, absorption heat pump. #12;2.8, and heating COP's approaching 1.7. A solar fired heat pump could provide the space heating needs of a building a new ...

A plant composed of an energy roof, a seasonal earth storage and an absorption heat pump has been tested. The purpose was to study the behavior of the various components and their interaction. The surveys went on during two years. The following operations...

A series of laboratory performance tests were conducted on an absorption cycle water chiller and heat pump. The part-load performance was compared to the full-load capacity and coefficient of performance. The causes of performance degradation with shorter operating times are speculated upon with partial substantiation resulting from ...

A series of laboratory performance tests were conducted on an absorption cycle water chiller and heat pump. The part-load performance was compared to the full-load capacity and coefficient of performance. The causes of performance degradation wih shorter operating times are speculated upon with partial substantiation resulting from ...

The purpose of the research was to determine if modified NaOH solutions could be used in absorption heat pumps (AHP) to provide higher heat pumping lifts from low ambient temperatures than are now possible. The research consisted of performing screening e...

The objective of the program is research, development and demonstration of a double-effect generator cycle absorption heat pump for the residential and small commercial markets. During Phases II and IIA, a 3RT advanced breadboard air-to-air reverse cycle ...

The suitability of electrolytic, methyl alcohol salt mixture phases as working media in absorption heat pumps is deduced from evaluation criteria for mass systems. The binary mixture of methanol and lithium bromide is taken as starting point, although the...

This paper proposes a novel latent heat storage which is applicable to solar space heating systems. The device is similar to an absorption refrigerator and stores liquid refrigerant which is subsequently evaporated to release the latent heat. It will recover the energy in a heat ...

The operation of a heat pump is described. Heat pump operating principles, the Rankine refrigeration cycle and the heat pump systems based upon that cycle are explained. The actual performance of commercially available heat pumps ...

... in parallel with a water source heat pump. ... MILITARY FACILITIES, *SOLAR ENERGY, *HEAT PUMPS, METHODOLOGY, EXPERIMENTAL ...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium where the ...

Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium where the ...

This paper focuses on the optimization of the performance of a solar absorption cooling system composed by four units with interior energy storage. A full dynamic simulation model that includes the solar collector field, the absorption heat pump system and the building load calculation has been developed. It has ...

The US Department of Energy (DOE) is working with partners from the gas heating and cooling industry to improve energy efficiency using advance absorption technologies, to eliminate chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), to reduc...

Author: Darcy, Eric. Abstract: The purpose of this work: Are there any .... of the Space Shuttle s regenerable amine solid absorption system that was part of the ... Results from the study indicate that replacing a wax PCM heat sink with a ... 5% increase in radiator size or the addition of a lightweight heat ...

This thesis research paper presents the results of experiments using an optically pumped, pulsed potassium vapor laser in a heat pipe. The absorption on the potassium D2 line, output laser characteristics, and Raman scattering in potassium vapor are discu...

A numerical model for the performance of an ammonia-water absorption cycle in solar air conditioning, refrigeration, and heat pump systems are presented. The configurations comprise a solar driven generator, a rectifier, condenser, evaporator, absorber, preheater, and a subcooler. Cooling modes involve supplying ...

The Office of Building Energy Research and Development of the U.S. Department of Energy (DOE), has been funding R&D in advanced heat pumps and appliances since 1976. Much of that research has been managed for DOE by the Oak Ridge National Laboratory (ORNL). The objective of the Building Equipment Research (BER) program at ORNL has been to generate new ...

An absorption water chiller and an absorption heat pump were extensively tested under steady state and cyclic operating conditions. Since the tests were performed on two different units, one for a cooling only and one for a heating only application, the results of the testing of each unit are ...

Results from the University of Texas at Arlington/Solar Energy Research Facility (UTA/SERF) analytical and experimental study on residential solar heating and cooling systems are given. A description of the 145-sq m solar residence, its basic components, operation, and controls of various combinations of system components is presented. A comparison of solar-powered ...

Advanced heat-pump cycles are being investigated for various applications. However, the working media and associated thermal design aspects require new concepts for maintaining high thermal effectiveness and phase equilibrium for achieving maximum possible thermodynamic advantages. In the present study, the heat- and mass-transfer processes in two ...

Advanced heat-pump cycles are being investigated for various applications. However, the working media and associated thermal design aspects require new concepts for maintaining high thermal effectiveness and phase equilibrium for achieving maximum possible thermodynamic advantages. In the present study, the heat- and mass-transfer processes in two ...

A cooling system is described having a boiler, a heat source for the boiler including a burner, an absorption machine having a generator section and an absorber section, a steam trap for the generator section of the absorption machine, a condensate tank with a vent line to atmosphere and work to be heated. The ...

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...

A simple and promising numerical model is developed for simultaneous heat and mass transfer in smooth falling-film absorption. The systems of LiCl-H{sub 2}O and LiBr-H{sup 2}O are solved because they are the most popularly used materials in absorption heat pumps and chillers. The results are in ...

The diffusion-absorption heat pump 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 ...

In this report, Rankine-cycle heat pumps and absorption heat pumps (ammonia-water and lithium bromide-water) have been analyzed and optimized for a lunar base cooling load of 100 kW. For the Rankine cycle, a search of several commonly used commercial refr...

Engineering alloys were analyzed in an effort to identify corrosion resistant materials for the absorption heat pump (AHP). Testing focused on the corrosion behavior of carbon steels and austentic stainless steels Types 304 and 316L. Most of the tests were conducted in lithium bromide solutions at various temperatures under non-flowing ...

Absorption heat pumping (AHP) offers a highly economic and widely applicable avenue to process heat integration and heat recovery in natural gas liquid (NGL) fractionation plants. Economically priced equipment is now available for any required capacity rating. Installations are increasing. In ...