earticle

영어

The use of reflective-type insulation is increased gradually to save building energy in Korea. However, there is no tool or program for calculating K-Value of building envelope with this kind of insulation. For this reason, expensive and time-consuming experiment must be performed before the construction to verify K-Value of building component installed with reflective-insulation. Therefore, this study is to expand published thermal resistance calculation function of single reflective air space into K-Value calculation program of building envelope installed with reflective air space. The major results are summarized as follows. First, K-Value calculation program for building envelope installed with single reflective air space is developed. Second, It is confirmed that K-Value of roof model is decreased from 0.176W/㎡·K to 0.165W/㎡·K (6.3% reduction) and K-Value of wall model is decreased from 0.245W/㎡·K to 0.228W/㎡·K (6.9% reduction) by adopting with reflective air space. Third, the major design variables of reflective-insulation such as air space distance, effective emissivity and indoor/outdoor temperature conditions, affecting the K-Value of building envelope are identified.