Study on the Performance of Very High Temperature Heat Pump Mixtures
Good working fluid is one of the keys to the development of very high temperature heat pump technology.In this paper,according to the principle of complementary advantages,four non-azeotropic mixtures MB1,MB2,MB3 and MB4 are proposed for very high temperature heat pumps with heating temperatures greater than 140 ℃,and the cycle performance and optimal ratio of these four mixtures are studied under the conditions of evaporation temperature of 50 ℃,70 ℃ and 90 ℃ and condensation temperature of 140 ℃-160 ℃.The results show that benzene,cyclopentane,toluene,acetone and R13336mzz(Z)can be used as components of the mixtures of the heat pump at the heating temperature.The four mixtures have good performance,among which the cycle performance of MB2 is the best among the proposed mixed working fluids,and the COP reached 2.4 and the exergy efficiency reached 58.9％under the conditions of evaporation temperature of 50 ℃ and condensation temperature of 160 ℃.Under the conditions of evaporation temperature of 90 ℃ and condensation temperature of 160 ℃,the COP of MB2 reached 4 and the exergy efficiency reached 62.6％.The cycle performance of other mixtures was improved compared with the main component benzene,and the flammability of MB4 was lower than benzene.
High Temperature Heat Pumpmixturesheating Temperaturecoefficient Of Performanceexergy Efficiency
万方数据
维普
