회수기간을 고려한 기존건축물의 외피 및 열원설비 리모델링 최적 설계안 선정에 관한 연구

Abstract

In this study, we proposed remodeling alternatives with building envelope and plant systems which impact on heating and cooling energy consumption in existing building. We performed cost analysis of the alternatives, and presented the remodeling guideline of existing buildings based on these analyzed data. The maximum energy-saving rate was up to 47.4% using commercially available windows, insulations, heating and cooling plants, and, the payback period is 49.3 year. So, it can be said that it is not an economical way to achieve more than 50% of energy saving rate with change of building envelope system and plant system. Replacement of plant system is more efficient way to reduce energy consumption and cost addition compared with replacement of building envelope systems. Therefore, we should consider the plant systems primarily, and the building envelope systems secondarily in remodeling of the existing building.