Abstract
A glide temperature matching model based on the exergy matching coefficient was established for the phase change heat transfer process of non-azeotropic mixed refrigerants. The exergy loss rate of the temperature difference and the exergy loss rate of the glide temperature in the condenser and evaporator were analyzed, and the temperature matching coefficient of mixed refrigerants parameter πglide was derived to indicate mixed refrigerants with large refrigeration capacity. The model was experimentally verified by the performance of three types of mixed refrigerants in chillers. The results show that the higher the glide temperature, the bigger the condenser πglide of the mixed refrigerants and the worse the temperature-matching effect. The smaller the πglide of the evaporator, the better the temperature-matching effect, and at the same time, the greater the cooling capacity. This model can be used for predicting the different component mixtures of working fluids.
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