Abstract
As the construction of recycling system is making progress in the civilized community, the demand for the renovation of existing building facilities is growing and the public is in need of the many-faceted evaluation of renovation plan. This paper analyzes the relationship between economic efficiency and decrease in environmental impact, on the basis of the case studies of 5 renovation projects for existing office buildings, T, M, N, K and A. And "The evaluation method to renovation from the point of environmental view with the consideration of cost effectiveness" is proposed and applied, in order to,facilitate the evaluation to renovation on 2 axes, economic efficiency and decrease in environmental impact. Further, the proposed method is being applied to 20 environmental indicators of Green technology projects by Ministry of Land, Infrastructure and Transport (MLIT), and each indicator is evaluated accordingly. As a result of evaluation of 5 renovations by the proposed method, improvements in both economic efficiency and decrease in environmental impacts at 3 sites, T, M and N, are recognized. The evaluation of 20 indicators of Green technology shows that controlling the number of heat source equipment is the most effective method of renovation.
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