공기-물 직접 접촉식 열교환기를 구비한 농업시설 난방용 히트펌프시스템의 성능 분석
Performance of the Heat Pump with a Air-Water Direct Contact Heat Exchanger for Greenhouse Heating
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To utilize the air type natural energy for greenhouse heating during winter, it is necessary to develop a heating systemincluding heat recovery equipment from air type thermal energy. This study examined the efficiency of an air-water direct contact typeheat exchanger (DCHE) in a heat pump and the performance of the heat pump. The air entering the inlet of the heat exchanger contactsthe water and exchanges the heat in the heat exchanger. The water obtaining the thermal energy from the air is used as the heat sourceof a heat pump and the heat pump generates higher energy by compressing a refrigerant. The energy from the heat pump is stored inthe heat storage tank with water by heat exchange. The efficiency of the heat exchanger decreased with increasing intake airtemperature. The discarded heat that cannot be used increased with increasing air temperature. Overall, it is necessary to design andcalculate the heat capacity of a heat pump to determine the lowest temperature of the heat source to be utilized.
Abstract
To utilize the air type natural energy for greenhouse heating during winter, it is necessary to develop a heating systemincluding heat recovery equipment from air type thermal energy. This study examined the efficiency of an air-water direct contact typeheat exchanger (DCHE) in a heat pump and the performance of the heat pump. The air entering the inlet of the heat exchanger contactsthe water and exchanges the heat in the heat exchanger. The water obtaining the thermal energy from the air is used as the heat sourceof a heat pump and the heat pump generates higher energy by compressing a refrigerant. The energy from the heat pump is stored inthe heat storage tank with water by heat exchange. The efficiency of the heat exchanger decreased with increasing intake airtemperature. The discarded heat that cannot be used increased with increasing air temperature. Overall, it is necessary to design andcalculate the heat capacity of a heat pump to determine the lowest temperature of the heat source to be utilized.
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