Experimental investigation of energy and exergy performance of secondary loop automotive air-conditioning systems using low-GWP (global warming potential) refrigerants

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• 作者：Gang Li ^{gangli166@gmail.com" class="auth_mail} ; Magnus Eisele ; Hoseong Lee ; ^{hslee@umd.edu" class="auth_mail} ; Yunho Hwang ; Reinhard Radermacher
• 关键词：Secondary loop ; HFC-152a ; HC-290 ; Exergy destruction ; Mobile air conditioning
• 刊名：Energy
• 出版年：15 April, 2014
• 年：2014
• 卷：68
• 期：Complete
• 页码：819-831
• 全文大小：2123 K

文摘

In this study, the energy and exergy performance of secondary loop systems (2LPs) using HFC-152a and HC-290 was investigated. These 2LPs were compared with a HFC-134a direct expansion system as a baseline system. As compared with the baseline, tested refrigerant charge amount was reduced by 28% for the HFC-152a 2LP and 60% for the HC-290 2LP. Under typical 35聽掳C ambient temperature condition, the coefficient of performance (COP) of the HFC-152a 2LP was increased by 5% for highway driving conditions and 10% for idling conditions. Regarding the HC-290 2LP, the COP was increased by 8% under highway driving conditions and was decreased by 15% under idling conditions. As for the exergy performance, the total exergy destruction was reduced by roughly 9.6% for the HFC-152a 2LP and 14.3% for the HC-290 2LP as compared with HFC-134a baseline during highway driving conditions. A theoretical potential of HC-290 2LP idling performance is that its idling COP would be approximately 15% higher and its exergy destruction would be 12.5% lower than those of the HFC-134a baseline.