混合冷媒を用いたヒートポンプの有効エネルギー評価

概要

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The efficiencies of binary mixture operated heat pumps are analysed by available energy method. Mixtures HCFC22+CFC114, HCFC22+HCFC142b and HCFC22+HFC134a are used as working fluids. One of the advantages of binary mixtures in heat pump applications is a higher coefficient of performance, which is caused by small temperature difference between the heat sink/source fluid and the refrigerant. The relations between the COP and the irreversibility are examined for various mixtures. The mixture, of which temperature change throught the cooling process is almost the same as the temperature increase of the heat-sink fluid, has a maximum of the COP. Available energy evaluation gives us an effective advice in choosing a suitable binary mixture for conditions of heat sink and source fluids.
一般社団法人日本機械学会の論文
1993-06-25