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학교 교실의 천장형 에어컨 토출각도에 따른 온열환경 해석
안철린(Chul-Lin AHN),김동규(Dong-Gyue KIM),금종수(Jong-Soo KUM),박희욱(Hee-Ouk PARK),정용현(Yong-Hyun CHUNG) 한국수산해양교육학회 2005 水産海洋敎育硏究 Vol.17 No.2
It is necessary to develop new air-conditioning method which can be satisfied individual separated space and request of occupants. The indoor thermal environment and flow field are investigated both experimentally and numerically. This study concentrated on analysis of indoor thermal environment by diffusion direction of ceiling type air conditioner of the classroom. The velocity and temperature distribution of air in the room calculated by 3-dimensional method, which include the effect of insulation of the building and outdoor state. This analysis shows that optimum diffusion direction is 30° to increase thermal comfort in winter and optimum diffusion direction is 15° to increase thermal comfort in summer.
김태석(Tae-Suk KIM),김동규(Dong-Gyue KIM),정용현(Yong-Hyun CHUNG) 한국수산해양교육학회 2015 水産海洋敎育硏究 Vol.27 No.2
In this study, Life Cycle Assessment(LCA) was applied to the production processes of waste cooking oil recycling products. Recycling products as defined in the Law of Saving of Resources and Recycling Promotion are biodiesel and soap. Weighting result of biodiesel production process showed that the most significant impact potential was abiotic resource depletion(84.17%) followed by global warming(13.93%). In the case of the soap, the most significant impact potential was also abiotic resource depletion(58.59%) followed by global warming(33.71%). In terms of the whole system of the biodiesel production process, methanol showed the largest environmental impact potential(87.35%). While in the case of the soap, sodium chloride showed the largest environmental impact potential(99.99%). This study suggests that there should be improvement of the methanol recovery system in the biodiesel production process and also appropriate use of the major environmental impact materials in both processes.
김태석(Tae-Seok KIM),김동규(Dong-Gyue KIM),정용현(Yong-Hyun CHUNG) 한국수산해양교육학회 2015 水産海洋敎育硏究 Vol.27 No.6
In this study, we evaluate the eco-efficiency for recycling processes of Busan Resources Recycling Center for each year from 2010-2012. It analyze the impact of global warming on the power consumption by Life Cycle Assessment. Also calculate the economic value by net profit components those are sales amount and electric charge in accordance with the process operation. On the basis of these results, each of the eco-efficiency Factor analysis and dynamics analysis of 2011 and 2012 as the base year to 2010 are performed. As a result, the impact of global warming in all the recycling processes is increased by increasing power consumption 2010-2012. But net profit is decreased. In addition, the eco-efficiency of all the recycling processes is decreased and analysis result of the eco-efficiency trends is located on the Fully non Eco-efficiency (--) level. Therefore, all the recycling processes are necessary improvement for power consumption reducing and net profit increasing to further the environmental and economically sustainable direction.