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Development of a high-efficiency, gas-fired, absorption heat pump for residential and small-commercial applications. Phase 1, Final report: Analysis of advanced cycles and selection of the preferred cycle.

DE91010442

Publication Date	1990
Personal Author	Phillips, B. A.
Page Count	82
Abstract	The purpose of the total project is to develop a gas-fired absorption heat pump for residential and small-commercial applications that will produce at least 1.6 Btu of heating and 0.7 Btu of cooling per Btu of heat content in the gas being burned. The primary technology advances that can be used to attain the new goals are higher efficiency cycles, increased flue efficiency, and better fluids. Flue efficiency technology is well developed, and fan-assisted combustion systems with condensing heat exchangers can limit flue and insulation losses to the 10% range. If this 10% loss assumption is made, the resulting target cycle COPs are 1.78 in heating mode and 0.78 in cooling mode at the ARI rating conditions. The objective of Phase 1 was to analyze working fluids and absorption-cycle concepts that are capable of performing at the target COPs and are potentially competitive with existing space-conditioning products in cost, operating life, and reliability. Six advanced cycles were evaluated with ammonia/water as the fluid pair. Then additional analysis was performed with other fluid pairs to determine whether cycle ranking would change depending on which fluid was used. It was concluded that the preferred cycle/fluid was the generator-absorber heat exchange (GAX) cycle using ammonia/water as the fluid pair. A cost estimate made by an independent manufacturing engineering firm for a residential heat pump based on the cycle/fluid combination determined that the GAX heat pump could be cost competitive with existing products. 20 refs., 28 figs., 2 tabs.
Keywords	Commercial Buildings Gas Heat Pumps Residential Buildings Absorption Refrigeration Cycle Ammonia Coefficient of Performance Combustion Cooling Cost Design Evaluation Heat Exchangers Heating Manufacturing Performance Progress Report Recommendations Reliability Specifications Water Working Fluids EDB/320106
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97J - Heating & Cooling Systems 89B - Architectural Design & Environmental Engineering 41 - Manufacturing Technology 94 - Industrial & Mechanical Engineering
Corporate Authors	Oak Ridge National Lab., TN.; Department of Energy, Washington, DC.; Phillips Engineering Co., St. Joseph, MI.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Progress rept.
NTIS Issue Number	199117
Contract Number	AC05-84OR21400

Development of a high-efficiency, gas-fired, absorption heat pump for residential and small-commercial applications. Phase 1, Final report: Analysis of advanced cycles and selection of the preferred cycle.

Development of a high-efficiency, gas-fired, absorption heat pump for residential and small-commercial applications. Phase 1, Final report: Analysis of advanced cycles and selection of the preferred cycle.
DE91010442

Publication Date	1990
Personal Author	Phillips, B. A.
Page Count	82
Abstract	The purpose of the total project is to develop a gas-fired absorption heat pump for residential and small-commercial applications that will produce at least 1.6 Btu of heating and 0.7 Btu of cooling per Btu of heat content in the gas being burned. The primary technology advances that can be used to attain the new goals are higher efficiency cycles, increased flue efficiency, and better fluids. Flue efficiency technology is well developed, and fan-assisted combustion systems with condensing heat exchangers can limit flue and insulation losses to the 10% range. If this 10% loss assumption is made, the resulting target cycle COPs are 1.78 in heating mode and 0.78 in cooling mode at the ARI rating conditions. The objective of Phase 1 was to analyze working fluids and absorption-cycle concepts that are capable of performing at the target COPs and are potentially competitive with existing space-conditioning products in cost, operating life, and reliability. Six advanced cycles were evaluated with ammonia/water as the fluid pair. Then additional analysis was performed with other fluid pairs to determine whether cycle ranking would change depending on which fluid was used. It was concluded that the preferred cycle/fluid was the generator-absorber heat exchange (GAX) cycle using ammonia/water as the fluid pair. A cost estimate made by an independent manufacturing engineering firm for a residential heat pump based on the cycle/fluid combination determined that the GAX heat pump could be cost competitive with existing products. 20 refs., 28 figs., 2 tabs.
Keywords	Commercial Buildings Gas Heat Pumps Residential Buildings Absorption Refrigeration Cycle Ammonia Coefficient of Performance Combustion Cooling Cost Design Evaluation Heat Exchangers Heating Manufacturing Performance Progress Report Recommendations Reliability Specifications Water Working Fluids EDB/320106
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97J - Heating & Cooling Systems 89B - Architectural Design & Environmental Engineering 41 - Manufacturing Technology 94 - Industrial & Mechanical Engineering
Corporate Authors	Oak Ridge National Lab., TN.; Department of Energy, Washington, DC.; Phillips Engineering Co., St. Joseph, MI.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Progress rept.
NTIS Issue Number	199117
Contract Number	AC05-84OR21400