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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.
기업의 지속가능성 평가 대응을 위한 전자제품의 환경성 간이 평가 기법 개발
고광훈 ( Kwanghoon Ko ),안상혁 ( Sanghyuk Ahn ),이상용 ( Sangyong Lee ),김병주 ( Byungju Kim ),황용우 ( Yongwoo Hwang ) 한국전과정평가학회 2019 한국전과정평가학회지 Vol.20 No.1
Recently, the Sustainability Index such as DJSI(Dow Jones Sustainability Index) become more global trend for many electronic companies. In this study, we developed simplified environment assessment tool called by simplified LCA (SLCA) on electronic products and LCI Database in life cycle. Firstly, the environmental assessment categories were found for DJSI requirements such as global warming, mineral depletion, eco toxic, human toxic etc. Also, material database and parts database of life cycle inventory were developed for life cycle assessment. The stage of manufacturing, transportation, usage and disposal were developed for life cycle database. Finally, the SLCA tool was developed logically for environmental assessment based on excel program, in which the informations input on material selection, part weight and usage scenario, etc. The result of environmental assessment at the life cycle could be founded in using this tool. The meaning of this study have better effects of reducing load of evaluation and working time.