한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제17권1호
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  • Pages.146-153
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  • 2009
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

자동차용 $CO_2$ 에어컨 시스템 열교환기 성능 특성에 관한 실험적 연구

Experimental Studies on the Performance Characteristics of Heat Exchangers of $CO_2$ Air Conditioning System for Vehicle

  • 김성철 (자동차부품연구원 열제어시스템연구센터) ;
  • 이동혁 (자동차부품연구원 열제어시스템연구센터) ;
  • 원종필 (자동차부품연구원 열제어시스템연구센터)
  • 발행 : 2009.01.01
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초록

The performance characteristics of heat exchangers which consist of a gas cooler, an evaporator and an internal heat exchanger have been investigated at various operating conditions of $CO_2$ air conditioning system by experiments. The heat exchangers were designed for use in the vehicle $CO_2$ air conditioning system, when considering the characteristics of heat transfer and high pressure as $CO_2$ refrigerant. This paper studied the performance of heat exchangers at various compressor speeds and expansion valve openings, and quantified the heat transfer rates and pressure drops. Heat transfer rates at the gas cooler and the evaporator were 6.9 kW and 5.2 kW, respectively, when the compressor speed was 4000 rpm and refrigerant vapor quality at the evaporator outlet was 0.98. Therefore, this paper carried out that the heat exchangers were analyzed to achieve superior performance for the vehicle transcritical $CO_2$ cycle.

키워드

참고문헌

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