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Study on Cooling Performance Characteristics of Air Conditioning System Using R744 for a Passenger Vehicle

이산화탄소를 적용한 승용자동차 냉방시스템의 성능특성에 관한 연구

  • Lee, Ho-Seong (Thermal Management System Research Center, KATECH) ;
  • Cho, Chung-Won (Thermal Management System Research Center, KATECH) ;
  • Won, Jong-Phil (Thermal Management System Research Center, KATECH) ;
  • Lee, Moo-Yeon (Thermal Management System Research Center, KATECH)
  • 이호성 (자동차 부품 연구원 열제어시스템 연구센터) ;
  • 조중원 (자동차 부품 연구원 열제어시스템 연구센터) ;
  • 원종필 (자동차 부품 연구원 열제어시스템 연구센터) ;
  • 이무연 (자동차 부품 연구원 열제어시스템 연구센터)
  • Received : 2011.11.14
  • Accepted : 2011.12.13
  • Published : 2011.12.31

Abstract

The objective of this study is to investigate cooling performance characteristics of mobile air conditioning system using R744 as an alternative of R-134a. In order to analyze the cooling performance characteristics of the air conditioning system using R744 for a passenger vehicle, the developed air conditioning system using R744 was applied in a real passenger vehicle and tested under various operating conditions with the variation of gas-cooler inlet air conditions, evaporator inlet air temperatures and compressor speeds. As a result, cooling capacity and coefficient of performance (COP) of the tested air conditioning system decreased with the rise of the inlet air temperature of the gas cooler but increased with the rise of the inlet air temperature of the evaporator. In addition, cooling capacity and coefficient of performance (COP) increased by 42.2 % with the rise of the compressor speed from 900 rev/min to 1800 rev/min, but it decreased by 55.4%.

Keywords

Air Conditioning;Compressor;COP (Coefficient of Performance);R744 (CO2)

References

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Cited by

  1. Cooling Performance Characteristics on Mobile Air-Conditioning System for Hybrid Electric Vehicles vol.5, pp.1687-8140, 2013, https://doi.org/10.1155/2013/282313