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박연민(Park, Yeon-Min),성태경(Sung, Tae-Kyung),김병철(Kim, Byung-Chul),김민석(Kim, Min-Seok),정채봉(Joung, Che-Bong) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
In this paper, we provided a light diffusion simulation of one-side patterned acrylic sheet for the daylighting system. First, the light diffusing performance comparison of the several commercial pattern sheets had been done. In case of the making a big-size daylight collector for the huge space, collecting sheets would be installed in multi-layered manner to improve the insulation performance of the whole system. We only focused on double layered cases to simplify the problem. Secondly, overall light diffusing simulation had been done for various two layered combinations, such as face to face, face to back. The results shows that the smaller curved pattern the better in light diffusion performance and that double face lower pattern combination is the best regardless of the gap between two sheets.
성태경(Sung Tae-Kyung),박연민(Park Yeon-Min),김종민(Kim Joung-Min),이충식(Lee Chung-Sik),이을영(Lee Euol-Young),정채봉(Joung Che-Bong),김병철(Kim Byung-Chul) 한국태양에너지학회 2015 한국태양에너지학회 논문집 Vol.35 No.5
Whereas recent domestic buildings and industrial facilities are being constructed as large as possible, the daylighting systems for the large space have rarely been developed. Domestic situation has been reported as only several small or medium sized daylighting systems have been developed, and the large scaled systems have entirely being imported from abroad. We have developed a large scaled daylighting system for the big space. The developed system have been evaluated in terms of the average system efficiency and daylighting factor. Each results are shown with tabulated experimental data.
이충식(Lee, Chung-Sik),박연민(Park, Yeon-Min),오동현(Oh, Dong-Hyun),이을영,성태경(Sung, Tae-Kyung),정채봉(Joung, Che-Bong),김병철(Kim, Byung-Chul) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
In this papers, we analyzed the performance evaluation for Multi face primatic Daylighting System. For this research, we conducted optical simulations using Lighting Tools Program for 12 models under various conditions. We selected 2 type models on the simulation results. And we compared model Ⅰ(azimuth tracking model)"s field test result with simulation result. Results show that system efficiency of the tracking system is higher 18.5% than the passive. This means that if the performance ratio of the passive model is assuming 100%, it is similar to simulation"s result 113%.
다중 파라볼릭 반사경 방식을 이용한 추적식 집광시스템 개발
이충식(Lee, Chung-Sik),김종민(Kim, Jong-Min),박연민(Park, Yeon-Min),성태경(Sung, Tae-Kyung),정채봉(Joung, Che-Bong),강승훈(Kang, Seung-Hoon),김병철(Kim, Byung-Chul) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.2
Daylighting system is an alternative lighting system using daylight collecting device, light transformer and light diffuser. In this paper, we developed a daylighting system in which the collecting device composed by dual parabolic reflectors, the silica optical fiber adapted to the light transformer and light diffuser made of the polyglass squaresheet. We have estimated the system efficiency and general color rendering index(Ra)of the developed system. The system efficiency measured to 23.8% and Ra was revealed as 95. Ra number of the developed system is bigger than the number(65) of the previous fresnel lens based sunlight collector.