THE ENERGY SAVING EFFECTS FOR THE DYNAMIC INSULATION SYSTEM APPLIED TO WINDOW FRAMES FOR RESIDENTIAL BUILDINGS

Abstract

This paper describes energy saving effects of the proposed system with active ventilation function and a heat pump for heat recovery. First, the air-temperature which supplied through the porous material by outdoor temperature was calculated using computational fluid dynamics to set the boundary conditions for energy simulation. Second, the cooling/heating loads were calculated using energy simulation for a typical residential building in Japan with various ventilation systems for comparison of energy-saving effects. In addition, in order to evaluate the energy-saving effects under different climatic conditions, the annual air-conditioning loads in several areas (Sapporo, Matsumoto, Tokyo and Kagoshima in Japan) were calculated. The calculated results showed that residential buildings with the proposed system could achieve energy savings of 4-23%. A comparison of different climatic conditions showed that the energy-saving rate was especially high in areas with a large annual temperature difference between the indoor and outdoor environment.