Abstract
Abstract >> The purpose of this study is to evaluate the experimental performance characteristics of a water-to-watergeothermal heat pump featuring a vapor refrigerant injection for the production of hot water. The performance of geothermal heat pump with a vapor injection was evaluated by comparing with that of a conventional geothermal heat pump without a vapor injection. For heating operation, the geothermal heat pump with a vapor injection is superior in COP and heating capacity. The vapor injection was more effective for supplying hot water while overloading. The vapor injection was effective for the improvement of the cooling capacity. However, the vapor injection was not effective for the increasing of COP according to the increased input of a compressor. The advantage of vapor injection in water-to-water geothermal heat pump become disappeared while cooling operationwith lower part loading. Key words : Geothermal heat pump(지열히트펌프), Vapor injection(증기분사), Heating capacity(난방능력), Cooling capacity(냉방능력), COP(성능계수)
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