太陽熱利用ハイブリッドヒートポンプシステムの開発
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概要
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For the global warming prevention, attention has been paid to the renewable energy, such as heat pump, solar energy and so on. The heat pump with the low global warming potential (GWP) refrigerant is more needed, while the heat pump with currently much used refrigerant, such as R410A, contributes to the global warming prevention. The carbon dioxide (CO2) refrigerant is one of the low GWP refrigerants. But, it has the problem with low refrigerating performance on physical properties. To solve it, we have investigated the ABSorption/CO2 compression hybrid heat pump. In hybrid heat pump, efficiency of the CO2 heat pump is improved by ABSorption heat pump that uses solar thermal energy for heat source. In this paper, the constitution of hybrid heat pump system and the downsizing of ABSorber are presented in detail. It is obtained through calculation that the volume of ABSorber is decreased by 30% than original one after downsizing process, which will be verified by experiment afterward.