Document Type : Original Paper


1 Ph.D. Department of Art and Architecture, Science and Research Branch, Islamic Azad University

2 Associate Professor, Faculty of Architecture, University of Tehran, Tehran, Iran.

3 ssociate Professor, Department of Environment and Energy, Science and Research Branch, Islamic Azad University (IAU), Tehran, 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.


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