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루버 핀 열교환기를 가지는 자동차용 히트펌프 시스템의 착상 특성 연구
임홍영(Hong Young Lim),송준영(Junyoung Song),신성홍(Sunghong Shin),김학규(Hakkyu Kim),오광헌(Kwanghun Oh),최영돈(Youngdon Choi) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The present study investigated the heating performance and frosting phenomenon of the heat pump system for vehicle, which is being developed to increase fuel efficiency of EV(Electric Vehicle) with maintaining thermal comfort. The experimental setup of a heat pump system consists of an electric compressor, an exterior louvered fin-flat tube condenser, an interior condenser, and an evaporator, block type thermal expansion valve and reservoir tank, which are used in actual HVAC system for vehicle. In this study, frosting phenomenon patterns of outside condenser having uniform air flow rate was visualized and heat pump performance is examined experimentally. In addition, the frosting phenomenon is compared with different compressor rpm. As results, non-uniform frosting phenomenon and non-frosting area in exterior condenser was occurred. The heating performance based on air side of interior condenser outlet was maximized within 4min. The heating performance was reduced 5.3% after 27min and 42% after 90min because of frosting in exterior condenser.
수냉식 응축기를 적용한 자동차 에어컨 시스템에 관한 실험적 연구
장준일(Junil Jang),김병주(Byungju Kim),신성홍(Sunghong Shin),박상정(Sangjung Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The present study investigated vehicle air conditioning system applied water cooled condenser using calorimeter. Air conditioning system of present study was composed of condenser, compressor, evaporator and expansion valve. To evaluate water cooled condenser, lower temperature radiator and electric water pump were added. First, the present study presented the performance of air conditioning system applied water cooled condenser by comparing traditional air conditioning system applied air cooled condenser. For air conditioning performance, water cooled condenser system showed 4~9% lower than air cooled condenser system. Secondly, the effect of water cooled condenser size, lower temperature radiator size, mass flow rate of low temperature radiator and face air velocity on performance air conditioning system was presented. It was shown the effect of water cooled condenser size and mass flow rate of lower temperature radiator was small.