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학술대회자료
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이호성 (자동차부품연구원) 원종필 (자동차부품연구원) 조중원 (자동차부품연구원) 이무연 (자동차부품연구원) 정영철 (자동차부품연구원) 김용찬 (고려대학교)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2011년 한국자동차공학회 학술대회 및 전시회
발행연도
2011.11
수록면
2,939 - 2,944 (6page)

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Experiments of thermal management system(TMS) with the variation of operating conditions for fuel cell electric vehicle(FCEV) has been performed. The amount of heat discharge for FCEV stack cooling system is approximately up to 2 times more than that for conventional internal combustion vehicle due to low temperature difference between coolant inlet and air inlet. This paper studied stack cooling performance characteristics with TMS operating modes, such as stack cooling heat exchanger only(Mode 1), cooling system operation(Mode 2), and cooling and A/C system operation(Mode 3). As test modes are changed, heat load to stack cooling heat exchanger will increase due to the rise of ITD(Inlet temperature difference between cooling air and coolant). As results of various experiments, compared between mode 1 and mode 3, performance at the stack cooling viewpoint decreased up to 34.0 % with fixed operating conditions. As cooling air velocity rises, heat load increment gets less due to enough cooling air flow rate. Indoor and outdoor air conditions influence A/C system, which leads heat load change to stack cooling heat exchanger with the variation of heat rejection rate. In this study, as outdoor temperature increases, heat rejection rate from the condenser increases, which stack cooling performance decreases. To optimize the performance of TMS containing heat exchangers, the irreversibilities of individual heat exchangers must be minimized, Therefore, entropy change of stack cooling heat exchanger was analyzed and the relationship between entropy generation and cooling air velocity was studied.

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UCI(KEPA) : I410-ECN-0101-2013-556-001417569