عنوان مقاله [English]
The energy consumption is sharply rising at urban building especially in developing countries due to the public growth, increasing of urbanization and improved lifestyle. Considering the climate condition in architecture of buildings can contribute to reduce energy consumption and the consequence could be to reduce the pollution without reducing the quality of life. The aim of this investigation is of optimal orientation of building as an effective way to optimize the fuel consumption in the Shiraz city. In this regard, first by using meteorological data for daily average of minimum and maximum temperature and minimum and maximum relative humidity in the period of 55 years (1959-2013), and by using an Effective Temperature Index and drawing two hours isothermal curve the needs bioclimatic building assessment of was conducted in Shiraz. Then by using the way of cosine computing, the energy intake level from vertical during the months of the year was estimated. Based on the results of our research checking the bioclimatic conditions, 37% of the area need for heating and 9% felt need for cooling considering the fact that the main need in Shiraz is to be heated, the optimal directions for building south, southeast and southwest to was estimated. Among these directions, the south direction was found optimal due to its maximum absorption of energy in cold times and lower absorption energy in warm times of the year. Also the optimal distance of buildings was calculated in order to prevent the shadow which shows that under current satiation, it impossible to have distance but it could useful for new buildings.