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축냉 증발기 적용을 통한 ISG Mode 시 냉방성능 유지 효과에 대한 실험적 연구
전영하(Youngha Jeon),오광헌(Kwanghun Oh),왕윤호(Yoonho Wang) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.10
Recently regulations regarding CO2 emission and fuel economy of automobile are being released. To cope with the regulations, ISG (Idle-Stop and Go) mode is being widely applied to conventional and hybrid car with decreasing compressor driving time. In this paper, effect of cold storage system which can maintain cooling performance and thermal comfort during ISG mode is dealt. The system consists of evaporator including cold storage material inside and other parts which are used in conventional air-conditioning system, and other additional part was not used. This paper presents experimental results of cooling performance during ISG mode and test was conducted in system bench stand. Evaporators with different size and several cold storage materials were compared. As a result, cold storage evaporator could maintain thermal comfort during about 40 seconds longer than conventional system. It is identified that cold storage evaporator can be used also in high speed condition to improve fuel economy through compressor on/off control.
ISG Mode 시 축냉 시스템의 냉방 효과에 대한 실험적 연구
전영하(Youngha Jeon),오광헌(Kwanghun Oh),정순안(Sunan Jeong),왕윤호(Yoonho Wang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Recently regulations regarding CO2 emission and fuel economy of automobile are being released. To reduce fuel consumption through decreasing compressor driving time, ISG (Idle-Stop and Go) mode is being widely applied to internal combustion engine and hybrid vehicle. In this paper, cooling effect of cold storage system which can provide thermal comfort during ISG mode is validated. The cold storage system consists of the evaporator including cold storage material inside and other parts which are being used in conventional air-conditioning system. In this system, other additional part is not needed for cold storage function. This paper presents experimental results of cooling performance during ISG mode and the vehicle test was conducted both in climate wind tunnel and on road. From previous research, it can be assumed that the outlet air temperature below 15℃ is in the thermal comfort range.6), 7) In climate wind tunnel test, cold storage system could keep thermal comfort during 221~255 seconds which is longer than conventional system by 35~46%. In urban traffic test, which average stop time in accordance with traffic signal was 66.3 seconds, cold storage system could cover 89% stops without compressor restart keeping thermal comfort. Whereas conventional system should restart compressor in 56% stop to keep outlet air temperature below 15℃.