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PWM압축기를 이용한 시스템에어컨의 난방운전 시 압축기 토출온도 상관식
이상헌(S.H. Lee),권영철(Y.C. Kwon),장근선(K.S. Chang),허삼행(S.H. Heo),김대훈(D.H. Kim),윤백(B. Youn) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
An experimental study has been performed to investigate the correlation on compressor discharge temperature of system A/C in heating mode. Indoor and outdoor temperatures, the heating capacity, compressor discharge temperature and loading time are measured by the psychrometric calorimeter. The system is controlled by applying the scroll compressor, which is operated by PWM valve and loading duty. With increasing outdoor temperature, the heating capacity increases. With increasing indoor temperature, it decreases. Also, with increasing loading duty the heating capacity increases. According to the increase in outdoor temperature and loading duty, compressor discharge temperature increases. From these experimental data, the correlation on compressor discharge temperature is proposed. It is expressed as a function of indoor temperature, outdoor temperature, and loading duty. The correlation obtained from the present study is agreed with the experimental data within 2℃.
승객 거동 해석을 통한 퓨즈 형태 벨트(Fuse-type belt)의 효과 분석
이상헌(S.H. Lee),김동석(D.S. Kim),박재건(J.K. Park),이명식(M.S. Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
FE approach using reliable Finite Element(FE) dummy mode] had several strong aspects over Rigid-Body dynamic approach in occupant simulation. Rigid body dynamic approach requirs Force-Displcement(F-D) information between impacting dummy and planes of vehicle structure and component tests are essential to get that kind of information. But in FE approach, material properties are only needed. So FE approach is very convenient at the first stage of design when the test data are not available. In this study, occupant simulation was done by using commercial FE program, PAM-SAFE, in order to know the effect of fuse-type belt on occupant injury reduction. A fuse is installed at lap belt. The result showed 13% reduction of HIC with this type of belt.<br/> <br/>