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동절기 음영면적비를 이용한 공동주택 배치유형별, 세대별, 방위별 일조환경 평가 연구
윤종호(Yoon Jongho),여승기(Yeo Seung-Ki),박재성(Park Jason),최율(Choi Yool),이시웅(Lee Si-Woong) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study is to investigate the possibility of a quantitative analysis on sunshine right in apartment houses with a new evaluation index of shading area ratio(SAR) which represents seasonal average value of shaded portion of a window during definite period. SAR values of each apartment houses in a prototype building was calculated depending on apartment building arrangement types and orientations.<br/> Since the new method proposed in this research is able to measure the sunshine possibility of the each house in detail, which is more precise and descriptive than the existing method of sunshine judgment standard based on the sunshine hours only at winter solstice, it can be appropriately utilized as a highly qualified sunshine right judgment measures in apartment buildings.
후면 환기조건에 따른 건물외피용 태양광발전(BIPV)모듈의 열적 영향에 관한 실험연구
윤종호(Yoon Jongho),김재웅(Kim Jae-Ung) 한국태양에너지학회 2006 한국태양에너지학회 논문집 Vol.26 No.1
Building integrated photovoltaic(BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. On the other hands, lots of architectural considerations should be reflected such as installation position, shading, temperature effect and so on. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated. This study is on the combined thermal and PV performance evaluation of BIPV modules. The purpose of this study is to investigate a temperature effect of PV module depending on the ventilation type of PV module backside. Test cell experiment was performed to identify the thermal and power effect of PV modules. Measurement results on the correlation of temperature and power generation were obtained. Those results can be utilized for the development of optimal BIPV installation details in the very early design stage.
윤종호(Jongho Yoon),황경충(Kyungchoong Hwang),김종배(Jongbae Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Aluminum alloys have been used as the part materials of aerospace and automobile industry because they have high specific strength. The light weight of them are attractive because it makes the energy savings. They are light, but they have high strength, excellent corrosion resistance, and good machinability.<br/> In this study, a series of creep tests for the 3-element aluminum alloy under the 16 temperature & stress conditions have been performed. Its' life prediction constant of Larson-Miller parameter is calculated as about 5 and the ductile fracture was primarily observed by intergranular fracture.<br/>