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

Gang Li, Magnus Eisele, Hoseong Lee, Yunho Hwang, Reinhard Radermacher

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

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°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.

Original languageEnglish
Pages (from-to)819-831
Number of pages13
JournalEnergy
Volume68
DOIs
Publication statusPublished - 2014 Apr 15

Keywords

  • Exergy destruction
  • HC-290
  • HFC-152a
  • Mobile air conditioning
  • Secondary loop

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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