Title: Irreversibility analysis of a compression refrigeration cycle using natural refrigerants for a sustainable future

Authors: Ali Kilicarslan

Addresses: Department of Mechanical Engineering, Hitit University, 19030 Cevreyolu Corum, Turkey

Abstract: Irreversibility analyses of R290, R717, R718 and R744 are carried out in a compression refrigeration cycle. The effects of evaporator temperature, condenser temperature and isentropic efficiency on the irreversibility of the cycle and its basic components are investigated and exergy analysis of the cycle is also presented as a function of evaporator and condenser temperatures. The irreversibilities of the natural refrigerants decrease as the evaporator temperature and isentropic efficiency increase, whereas those increase with the increasing values of condenser temperatures. The highest irreversibilities generally occur in the condenser, and the lowest ones occur in the evaporator.

Keywords: compression refrigeration cycle; natural refrigerants; R290; R717; R718; R744; exergy; irreversibilities; evaporator temperature; condenser temperature; isentropic efficiency; exergy analysis.

DOI: 10.1504/IJEX.2012.045863

International Journal of Exergy, 2012 Vol.10 No.2, pp.155 - 170

Received: 01 Oct 2010
Accepted: 05 Aug 2011

Published online: 15 Mar 2012 *

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