R22/R114系混合冷媒を用いたヒートポンプシステムに関する研究 : 第1報, 組成および熱源条件が成績係数に及ぼす影響

概要

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The performance of a heat pump system is tested using an R22/R114 refrigerant mixture of 0, 50, 75 and 100 mo1% R22 as the working fluid. Double pipe counterflow heat exchangers of 12m in length with a smooth inner tube of 22.4mm I. D. are used for the condenser and evaporator. The effects of inlet temperature, temperature change and flow rate of the heat source water and heat load on COP are clarified. The COP for the mixture is found to be lower than that for pure refrigerant because of the lower heat transfer coefficient in condenser and evaporator. However, a trial calculation shows that the COP of the mixture becomes higher than that of pure refrigerant in the case of a large change in the water tempehature if the heat transfer coefficient is twice as large as that of the experimental value and the superheating of the refrigerant is zero at the exit of the evaporator.
一般社団法人日本機械学会の論文
1991-05-25