Exergy analysis of advanced transcritical CO₂ air conditioning cycles
by Wendy W. Yang, Amir Fartaj, David S-K. Ting
International Journal of Exergy (IJEX), Vol. 5, No. 2, 2008

Abstract: The energy and exergy balance methods were performed on two advanced transcritical CO₂ air conditioning cycles presented in the literature. In addition to the basic transcritical CO₂ air conditioning cycle which has five main components, compressor, gas cooler, evaporator, expansion valve and internal heat exchanger, two advanced cycles are investigated; both have two-stage compressor (low stage and high stage) and intercooler, with one of them has an additional Flash Gas Removal (FGR) chamber. The results demonstrated that the compressor-low stage has the largest exergy loss, while the intercooler has the smallest exergy loss in advanced transcritical CO₂ air conditioning cycles. Moreover, it demonstrated that the FGR had a minimal effect on improving COP of the system.

Online publication date: Sat, 12-Jan-2008

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