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외피 단열성능 향상에 따른 업무용 건축물 에너지 소요량 분석
서경식(Seo, Kyeong-Sik),권장혁(Kwon, Jang-Hyeok),정재욱(Jung, Jae-Uk),서승직(Suh, Seung-Jik) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
Low-energy buildings can be realized from the sectors: building, machinery and facilities, electrical facilities, and renewable energy. Building sector can be approached from the design stage and it reflects energy-saving factors and shielding coefficient to the plan to prevent the heat loss from windows, walls, roofs, and floors. To this end, this study has set heat transmission coefficient of walls, heat transmission coefficient of windows, solar radiation transmission coefficient, percentage of window area, and density of lighting energy; performed simulations based on the standards of low-energy buildings established on 6 buildings whose energy efficiency rating was completed; and then calculated energy consumption.
박진서(Park Jin-Seo),서승직(Suh Seung-Jik) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.4
This study analyzed theperformance of passive solar system for office building. A unit model of the passive solar system was proposed in order to predict its performance under varying parameters and Seoul weather date. Steady state heat transfer equations were set up using a energy balanced equations and solved using a inverse matrix method. Numerical simulation program to analyze system was developed by using MATLAB. As the results, the passive solar system performance of office building was determined by the insolation and the outdoor air temperature. Also the passive solar system indicate 6.7∼16.2% of annual average efficiency. In the comparison with other systems of the conventional wall, mass wall could reduce the heating loads of 7.1% and trombe wall could reduce heating loads of 11.5%. Through this study, performance of passive solar system for office building was verified by numerical method. Consequently, the passive solar system could operate an important role as the alternative for saving energy consumption of office building, and the additional studies should be made through the experimental method for the commercialization.
장향인(Jang Hyang-In),박진서(Park Jin-Seo),정진우(Jeong Jin-Woo),서승직(Suh Seung-Jik) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
This study analyzed the performance of solar chimney system for natural ventilation in underground spaces. A mathematical model of the solar chimney was proposed in order to predict its performance under varying parameters(insolation, stack height, distance between absorber wall and glass, ratio of a cross sectional area, etc.). Steady state heat transfer equations were set up using a energy balanced equations and solved using a inverse matrix method. Numerical simulation program to analyze system was developed by using MA TLAB. The ventilation performance of the solar chimney was determined by the temperature difference of air channel and inlet, and the temperature difference rose according to increasing insolation, height and distance. In addition, ventilation rate difference of 15% happened by the cross-area ratio. Through this study, performance comparison of solar chimney system for natural ventilation was fulfilled by numerical method. Further, experimental study is required to verify numerical simulation.
유치원 건물에서 다중 히트펌프 시스템의 적용에 관한 실험적 연구
한설이(Seol-Yee Han),김서훈(Seo-Hoon Kim),장향인(Hyang-In Jang),이상혁(Sang-Hyeok Lee),서승직(Seung-Jik Suh) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.10
We experimented with the energy saving effect of applying a multiplex heat pump system and suggests a dissemination plan for new and existing educational facilities. The development and dissemination of a new system could reduce energy consumption by up to 57%, and help solve environmental issues. Experimental performance evaluated in the kindergarten to analyze the energy saving effect of the cooling and heating system. The average daily COP of the cooling and heating period in the field test was 3.79. Our results showed that the annual energy consumption was reduced, and proved that the multiplex heat pump system is effective in reducing energy consumption.
허베이 스피리트호 유류오염사고 초기 생물체내의 중금속 오염현황
이종혁(J.H. Lee),정희석(H.S. Jeong),유영석(Y.Y. You),서승직(S.J. Seo),정주영(J.Y. Jeong),김광봉(K.B. Kim),최민호(M.H. Cheoi),조현서(H.S. Cho) 한국해양환경·에너지학회 2011 한국해양환경·에너지학회 학술대회논문집 Vol.2011 No.11
대형 유조선에 의한 유류오염사고가 2007년 12월 7일 충남 태안군 해역에서 발생하였다. 이로 인하여 해양에 장기간 지속적으로 잔류하게 되어 해양생태계에 영향을 일으킬 수 있는 중금속을 사고 해역의 해양생물을 대상으로 조사ㆍ분석하여 유류사고에 따른 중금속 오염현황을 연구 수행하였다. 태안연안의 생물에서 중금속을 조사분석하기 위해 조간대와, 특정도서에서 채집한 지중해담치, 굴, 대수리, 맵사리, 어류에서 크롬(Cr), 구리(Cu), 아연(Zn), 카드뮴(Cd), 납(Pb)을 검출하였다. 검출한 결과 채집된 모든 생물시료에서 크롬(Cr)과 납(Pb)은 검출되지 않았다. 구리와 아연은 생물시료 중굴에서 다소 큰 차로 상대적으로 가장 높은 농도범위와 평균값을 나타내었으며, 카드뮴은 맵사리에서 높게 나타났다. 지역적으로 직접 유류피해를 입은 연안 조간대지역에서 상대적으로 높게 검출되었으며, 대체적으로 어류를 제외한 모든 시료에서 타 연구결과의 농도보다 높은 농도를 나타내었으며, 국내와 외국 해산 어패류의 중금속 허용기준치를 초과하는 것으로 나타났다. 이러한 결과들로 잔류성과 생물농축성을 고려한다면 향후 사고연안에 서식하는 주요생물을 대상으로 장기적인 모니터링이 필요할 것으로 판단된다.
지하공간을 위한 태양 굴뚝 시스템의 연간 환기성능 평가
장향인(Jang Hyang-In),정진우(Jeong Jin-Woo),박진서(Park Jin-Seo),서승직(Suh Seung-Jik) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
In company with previous research which analyzed the natural ventilation performance, this study evaluated the annual performance of solar chimney system. A mathematical model of the solar chimney was proposed in order to predict its performance on Korea climate. Steady state heat transfer equations were solved using a inverse matrix method. Numerical simulation program to analyze system was developed by using MATLAB. As the results, the solar chimney system can provide 262.9㎥/h of annual average ventilation rate. Because seasonal differences of ventilation rate was calculated within 25%, the solar chimney system can be used for every season in Korea climatic condition. Consequently, the solar chimney system is proved to be effective device for natural ventilation utilizing at all times, and the additional studies should be made through the experimental method for imagineering and commercialization.