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RISS 인기검색어
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- 저자 : 모지환(Jihwan Mo) (검색결과 2 건)
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연료전지 스택 배열을 활용한 CO₂ 난방 시스템 배열열교환기 성능 특성에 관한 실험적 연구
이호성(Hoseong Lee),원종필(Jongphil Won),조중원(Choongwon Cho),임택규(Taekkyu Lim),모지환(Jihwan Mo),김용찬(Yongchan Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The aim of this study is to investigate the performance characteristics of CO₂ Heat Pump(H/P) system using the stack cooling coolant / refrigerant heat exchanger for fuel cell electric vehicles(FCEV). The present heating system for FCEV uses PTC heater, which results in lower fuel efficiency and reduction of driving range. To cope with heating performance improvement without additional power consumption, one of possible methods is to use stack coolant heat for FCEV. Due to high pressure and temperature operating condition for CO₂, CO₂ heat pump has been concerned that it seems to cover heating capacity with the similar capacity of engine coolant heating system. Furthermore, CO₂ heating system is free of environmental regulations for a vehicle refrigerant. In this study, experiments to analyze heating performance characteristics using the coolant / refrigerant heat exchanger have been done with various operating conditions, which are likely to match the actual vehicle’s driving conditions under cold ambient conditions, such as variation of coolant flow rate and interior air temperature. Experimental results show that the heating capacity has Max. 9.5 ㎾ @ coolant temperature 60℃, interior air outlet temperature is up to 45℃ @ ambient temperature -20℃, and the capacity of the coolant / refrigerant heat exchanger is 6.5 ㎾ @ coolant temperature 60℃. From various experimental results, optimal coolant flow rate to have optimum heating performance seems to exist under a certain ambient temperature(5.0 LPM@ ambient temperature -20℃)
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연료전지 스택 배열을 활용한 CO₂ 난방 시스템 성능 특성에 관한 실험적 연구
이호성(Hoseong Lee),원종필(Jongphil Won),조중원(Choongwon Cho),이무연(Mooyeon Lee),정영철(Youngchul Jung),모지환(Jihwan Mo),김용찬(Yongchan Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The aim of this study is to investigate the performance characteristics of CO₂ Heat Pump(H/P) system with stack coolant heat source for fuel cell electric vehicles(FCEV) under various operating conditions. The present heating system for FCEV uses PTC heater, which results in lower fuel efficiency and reduction of driving range. To improve heating capacity without additional power consumption, one of possible methods is to use stack coolant wasted-heat for FCEV. Due to high pressure and temperature operating condition for CO₂, CO₂ heat pump has been concerned that it seems to cover heating capacity with the similar capacity of engine coolant heating system. Furthermore, CO₂ heating system is free of environmental regulations for a vehicle refrigerant. In this study, experiments to analyze heating performance characteristics with stack coolant heat source have been done with various operating conditions, which are likely to match the electric H/P system operating conditions under cold ambient conditions, such as variation of compressor speed and interior air temperature. Experimental results show that stack coolant temperature needs more than 50℃ to have required heating capacity 6.0 ㎾ @ interior air inlet temperature, -20℃ under the rated electric compressor speed 4,000 rpm. From various experimental results, operating conditions to have optimum heating performance with stack coolant heat recovery under various interior air condition, such as the stack coolant temperature and the compressor speed, were found.
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