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Exergetic analysis of heat pump units for various climate conditions

DOI: 10.17586/1606-4313-2019-18-1-22-28
UDC 628.8, 621.577

Exergetic analysis of heat pump units for various climate conditions

Aleksandr A. Malyshev, Tatarenko U.V., Kireev V.S.

For citation: Malyshev A.A., Tatarenko Yu.V., Kireev S.V. Exergetic analysis of heat pump units for various climate conditions. Vestnik Mezhdunarodnoi akademii kholoda. 2019. No 1. p.

Abstract
The article deals with exergetic analysis of a heat pump for climate of Russian North-West. The dependencies between the parts pf the pump and its general characteristic are shown. The influence of ambient temperature, condensation temperature, and low-grade heat source on the working efficiency of heat pump units is analyzed.The changes in thermodynamic characteristics of the heat pump at ambient temperature decreasing form 0 оСto –15 оСare identified. The coefficient of performanceis seen to decrease two times, the coefficient of transformation – by 1.4 times; overall exergetic coefficient of performanceincreases by 18%. Working efficiencyand coefficient of performanceof the unit in general, and the ones of compressor, compensator, evaporator and thermal expansion valve are determined. The results of the research are of use for increasing efficiency of heat pumps.

Keywords: heat pump, exergetic analysis, condensation temperature, ambient temperature, low-grade heat source temperature, coefficient of performance, heating coefficient, working efficiency.

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