기존 단독주택의 리모델링을 통한 제로에너지화 가능성 분석

Abstract

Purpose: In order to reduce energy consumption in buildings and realize a low-carbon society, it is necessary not only to strengthen standards for new buildings, but also to actively remodel existing buildings to make zero energy. Therefore, this study aims to evaluate the energy saving and energy independence rate by year of existing buildings in order to activate the remodeling of existing buildings with zero energy. In addition, we intend to analyze the economic feasibility of the zero energy remodeling. Method: According to the yearly insulation performance criteria, the existing building is set to three types of aging, and the possibility of zero energy is analyzed. In addition, the cost of energy saving by reducing energy consumption through zero energy remodeling and the payback period of initial investment costs are analyzed to analyze the remodeling economics of each building. Result: Although it was not possible to achieve the energy efficiency level required for zero energy building certification, it was able to reduce energy consumption by 41 to 45% of the energy consumption of the existing building. It was possible to achieve energy independence rate of 20% or more, but existing buildings with severe aging need to significantly increase the installation capacity of PV systems. As a result of economic analysis, the payback period of the old buildings with aging buildings was short, because the energy savings compared to the construction cost were large.