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학교시설관리비의 효율적인 예산배분을 위한 연차별 가중치 도출
이관종(Lee Kwan-Jong),이춘경(Lee Chun-Kyong),박태근(Park Tae-Keun) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Based on the performance data of management costs in educational facilities that have been actually invested in last 20 years for budget support to school facility managers, this study intends to forecast facility management costs to be arisen 20 years later. Moreover, annual weight by classes & grades would be derived base on maintenance level, and ultimately the annual ratio of facility management costs by school classes would be presented. Based upon such results, efficient budget allocation on school facility management costs and standards for preventive maintenance would be prepared.
박이동,이관종,장영근 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2
This study is to obtain optimized design parameters of waste heat boiler with fire and smoke tube which are widely used to provide process and building heat. The optimum parameters obtained in this study can be used as a guideline for actual. boiler design of this type. The design optimization considered here is to find the most economical dimensions of the boiler considered which results in a minimum cost in producing a unit amount of steam per given period of operation. For this purpose, the first we have to determine what are the main parameters of affecting the total cost of producing a unit amount of steam which is comprised of manufacturing cost of the boiler, operating cost of the fan, etc. For the selected design parameters, we will have to decide the conditions of each parameter which will result in the minimum total cost. For the waste heat boiler with fire and smoke tube under consideration, the major parameters of affecting the total cost are considered to the diameter of the smoke tube and the gas velocity among others. The two parameters selected here are considered for finding the optimum size of the boiler by minimizing the total cost which is a function of the manufacturing cost, purchasing cost of the fan, and the operation cost of the system. Through computer simulation, the optimum conditions of these two parameters are obtained for different boiler capacities and different periods of operation.