Journal of Climate Change Research (한국기후변화학회지)
- Volume 3 Issue 2
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- Pages.153-159
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- 2012
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- 2093-5919(pISSN)
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- 2586-2782(eISSN)
Measurement of R-134a Leakage from Vehicle Equipped Mobile Air Conditioning(MAC) System
실차를 이용한 자동차 에어컨 냉매 누출량 평가
- Kim, Ji Young (Transportation Pollution Research Center, National Institute of Environmental Research) ;
- Seo, Chungyoul (Transportation Pollution Research Center, National Institute of Environmental Research) ;
- Lee, Sangeun (Transportation Pollution Research Center, National Institute of Environmental Research) ;
- Kim, Jeongsoo (Transportation Pollution Research Center, National Institute of Environmental Research)
- Received : 2012.05.18
- Accepted : 2012.06.13
- Published : 2012.06.30
Abstract
CFC-12 used in mobile air conditioning(MAC) system has been replaced by R-134a, a type of HFC refrigerant, from 1991 to 1994. R-134a has since been widely used as a refrigerant of a mobile air conditioner. However, it is one of the six main green house gases listed in Kyoto Protocol, which makes it imperative to regulate its emission and develop alternative refrigerants. In this study, the concentration of leaked R-134a was measured using VT(Variable Temperature) shed and Running loss test shed to analyze the level of air conditioner refrigerant leaked in a vehicle. According to the analysis of the concentration of R-134a leaked from a vehicle parked, annual leakage amount of R-134a was in the range of 6.46~13.28 g/yr. The figure was similar with the leakage from the mobile air conditioning system currently used. In a study using the same vehicle model, a vehicle equipped with dual evaporation system had a higher leakage rate of refrigerant than a vehicle with a single evaporation system. It appears that the added fittings and joints of the dual evaporator system led to higher leakage rate. Besides, the analysis of the change in R-134a concentration under various car speed found that more refrigerant leaked under high speed(100km/hr) and but the volume of the wind did not affect to the variation of refrigerant leakage.
자동차 에어컨 냉매로 사용되어온 CFC-12는 1991년부터 1994년에 걸쳐 HFC 계열의 냉매인 R134a로 대체되었으며, R-134a는 현재자동차 에어컨 냉매로 널리 사용되고 있다. 그러나 R-134a는 지구온난화 지수(GWP)가 1,300으로 매우 높으며, 교토의정서에서 정한 6대 온실가스 중에 하나로 포함되어 누출량 관리 및 대체 냉매 개발이 필요한 실정이다. 본 연구에서는 자동차에서 배출되는
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