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Thermophysics and Aeromechanics

2011 year, number 2

Efficiency of vapor compression heat pumps based on non-azeotropic refrigerant mixtures

N.N. Mezentseva
Kutateladze Institute of Thermophysics SB RAS
Keywords: non-azeotropic refrigerants, heat pump, energy conversion ratio
Pages: 323-330


The work presents the results of cycle computation for vapor compression pumps based on ozone-safe mixed refrigerants. Non-azeotropic binary refrugerants R32/R152а (30/70) and R32/R134а (30/70) were considered as working substances. Properties of non-azeotropic refrigerants were calculated according to the additivity method of thermodynamic functions and method of Lemmon and Jacobsen. Deviations in the values of thermophysical properties obtained with two methods have been determined. It is shown that at the use of non-azeotropic mixture R32/R152a (30/70), energy conversion ratio increases by 2.2−3.6 % compared with the results for R32/R134a (30/70) at temperature difference between the processes of boiling and condensation from 28 to 53 °С.