Evaluation of the effect of building orientation on achieved solar radiation - a NE-SW orientated case of urban residence in sem-iarid climate

Nowadays, with the development of the economy, the demand for energy is increasing rapidly while the energy supply is growing shorter and shorter. Researches indicate that energy consumption in the residential sector counts for the main parts of the total energy consumption. This paper evaluates the effect of building orientation on exposure to the solar radiation in a NESW orientated case of urban residence in semi-arid climate. SW envelope, with an annual exposure of 13.52 percent, only improves the thermal comfort of the house because of its annual climatic radiation trend. For vertical NE surface with insufficient winter radiation exposure of (0 %) and cool summer radiation exposure of (3.38 %), it could be concluded that the NE elevation is suitable and in demand in the summer but not in the winter. Total annual horizontal solar radiation exposure percentage of (83.04%) indicates that huge non- climatic roof radiation is inappropriate and should be omitted. Finally, the effects of solar radiation envelopes on electricity and natural gas consumption were thoroughly discussed.