Abstract

The purpose of this study is to develope the prediction equation of Equivalent U-value(Ueq) that include thermal bridge in composite timber-framed structure using statistical method. Specifically, in order to draw regression equation, total 226 cases of heat transfer simulation were performed controlling influence of independent variables from Ueq and Linear Thermal transmission(${\Psi}$) in timber frame, then the high influence independent variables were selected through Hierarchical regression analysis. The selected independent variables for regression equation are the timber frame ratio, the timber frame thermal conductivity, and the insulation thermal conductivity. The prediction equation was observed sufficiently accurate as R-squared(0.9 and more) and ANOVA of significance level(P<0.0001) based on analyzed results of R-squared and Analysis of Variance(ANOVA). The comparison between results of the prediction value and the heat transfer simulation, Ueq was calculated an average errors(1.7%) and maximum errors(4.6%) that presented high reliability result. According to this prediction equation, timber frame of energy performance evaluation will be accurate and expeditious, and we will enhance type of specification and shape in order to draw more accurate prediction equation.

Keywords

• Equivalent U-value;
• Linear Thermal Transmission;
• Complex Material;
• Timber Frame;
• Regression Analysis

• 상당열관류율;
• 선형열관류율;
• 복합재료;
• 목구조;
• 회귀분석;