Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7175202 | International Journal of Refrigeration | 2018 | 48 Pages |
Abstract
Natural refrigerants are attractive candidates for replacing the high Global-Warming-Potential fluorinated refrigerants used in ground-source heat pumps (GSHPs). This paper presents a comprehensive survey on GSHPs using CO2, NH3, water, and hydrocarbons. We compared the refrigerants' thermodynamic properties, analyzed their performance in brine-to-air and brine-to-water GSHPs, and discussed recent progress in their use in GSHPs. Studies of CO2 were the most common due to its favorable properties, covering advanced cycles, direct-expansion, secondary fluid, and hybrid GSHPs. Though with toxicity concerns, NH3 was the second most studied, including vapor-compression GSHPs for heating, absorption-type GSHPs to eliminate ground imbalance, and hybrid compression-absorption GSHPs to widen the operating temperature range. A few studies evaluated water as a refrigerant for absorption-type GSHPs, including applications for solar cooling, ground imbalance, and district heating. Propane was the only hydrocarbon considered for GSHPs, including analyses on refrigerant charge, performance analysis, and propane as a secondary fluid.
Keywords
EESSuction line heat exchangerGAXHCFCHFCCFCGWPTRNSYSSPFGSHPCOPASHPODPWaterEAUDomestic hot waterDHWAmmoniaAmmoniacHVACDioxyde de carboneCarbon dioxidecoefficient of performanceseasonal performance factorNatural refrigerantHydrofluorocarbonhydrocarbonhydrocarburesHydrochlorofluorocarbonOzone depletion potentialground-source heat pumpAir-source heat pumpchlorofluorocarbon
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Wei Wu, Harrison M. Skye,