Absorption Applications for Residential-Light Commercial

Absorption Applications for Residential-Light Commercial Space Conditioning and Water Heating (2022) - Absorption cycles using the ammonia-water refrigerant pair have a long track record of commercial applications ranging from industrial-size cooling using waste heat as the energy source, to gas-fired residential air-conditioners and small refrigerators for recreational vehicles using propane fuel. However, the heating side of the cycle (as a heat pump) has not seen widespread use. With a Coefficient of Performance (COP) ranging from 1.4 to 2.0 for space and water heating, ammonia-water absorption heat pumps have potential to provide significant CO2 emission reductions for residential and light commercial applications, which are historically very difficult to decarbonize. In this paper, methods of applying gas-fired absorption heat pumps to heating applications normally served by furnaces, boilers or commercial water heaters are reviewed, including the potential energy and CO2 emissions reductions compared to both conventional and electric vapor compression appliances.
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