performance of building energy efficiency by orientation with regression: a case of semi desert in iran

In this research multiple-regression analysis with stepwise selection method was employed for investigating the effect of vertical building envelopes solar radiation (evr) on cooling energy consumption (e cooling) in residential sector. the high capacity of solar energy in semi-arid climate (shiraz) can provide a part of buildings required energy. depends on house orientations in two directions of se and sw and by using statistical data, e cooling in urban residences was analyzed. the autocorrelation in the residuals, checked by durbin- watson test, was not existed. by investigating the relations between average evr and e cooling in each group, it can be proved that climatic orientated houses can achieve lower e cooling, owing to se desirable orientation. the percentage of evr in sw houses is 28.89 % and in se it is 15.72 %, so choosing the building orientation is important to reduce energy consumption. finally, the concluding remarks were indicated.