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하이브리드 차량용 통합 냉각시스템 성능 평가 및 해석적 연구
이호성(Hoseong Lee),원종필(Jongphil Won),김성철(Sungchul Kim),이동혁(Donghyuk Lee),김현철(Hyun Chul Kim),이대웅(Daewoong Lee),권대복(Daebok Kwon) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The aim of this study is to evaluate the performance of integrated engine/motor cooling system and analyze the battery/inverter cooling system for hybrid electric vehicles(HEV). The prototype integrated radiator for engine/motor cooling was fabricated and the performance was evaluated on the optimum test rig with the variation of coolant flow rate and air inlet velocity. Electrical device cooling system, such as motor and controller, needed to be maintained under 50℃ for thermal stability. Under the certain condition, which inlet temperature difference(ITD) between air and coolant is 20℃, optimum coolant flow rate for electrical device cooling radiator was 10 LPM with heat capacity, 4.5㎾ at air inlet velocity 4㎧. The analysis of the battery/inverter cooling system has been peformed by applying the computational fluid dynamics (CFD) code to investigate fluid dynamic behavior characteristics and effectively design air flow rate of the system for hybrid electric vehicles (HEV). As a result, at design operating condition, air flow rate of the battery/inverter cooling system was 218.0 ㎥/h and the corresponding efficiency of the blower motor was predicted about 70.7%. Furthermore, for the battery/inverter cooling system, the average temperature of the battery was about 42.4℃.
Performance investigation on solid desiccant assisted mobile air conditioning system
Lee, Hoseong,Lin, Xiaojie,Hwang, Yunho,Radermacher, Reinhard Elsevier 2016 Applied thermal engineering Vol.103 No.-
<P><B>Abstract</B></P> <P>In the conventional mobile air conditioning system, the temperature and humidity control is achieved by a vapor compression system. This system cools the air down to lower than the dew point temperate of the cabin to control the humidity. Thus, reheating of the air is necessary. These two factors could increase the fuel consumption of the system. To overcome these issues, a solid desiccant assisted mobile air conditioning system is proposed and investigated. The desiccant assisted technology can separate the latent heat load from the sensible heat load, which will effectively increase the evaporating temperature and reduce the power consumption of the compressor. It is proposed to apply the solid desiccant to the mobile air conditioning system to handle most of latent load, while the vapor compression cycle handles the remaining latent load and sensible load. The model of the proposed concept is developed and validated with experimental data. Lastly, the possible configurations of the solid desiccant assisted mobile air conditioning system are discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A solid desiccant assisted MAC system is proposed and investigated. </LI> <LI> The developed model is validated with experimental data. </LI> <LI> The proposed system reduced the power consumption by 26.3%. </LI> <LI> Possible system configurations of the solid desiccant assisted MAC are discussed. </LI> </UL> </P>