Optimize Direction for Building Structures Based on Solar Energy Radiation in Hamedan

Today, the relationship between architectural climate and design for building structures and solar radiation is quite evident. Therefore, optimization of these structures during the warm and cold years will reduce energy consumption and increase productivity. In this regard, the present study tries to investigate the radiation conditions in Hamedan to optimize the building in hot weather with the lowest energy intake and in cold weather with the highest solar energy. In order to achieve this goal and calculating the solar radiation intensity on the vertical surfaces of buildings in Hamedan, using Excel software, the computational method was calculated by Cisco Stevenson, and the effective temperature calculations were used to distinguish between cold and hot periods. The results showed that the special geographical position of Hamedan, including its placement in the western half of the country, its coldness and its proximity to the Zagros-Alvand mountain range, has caused the need for energy in most months of the year (except in the summer and middle of the day) The sun is high. Also, the results indicate that the most suitable direction for the view of one-way buildings is to the south with a deviation of 15 degrees eastward and west. For the two-way buildings, the north-south direction is the ideal direction, because 18.6% of the sun's energy is related to the warm year and 81.4% of the cold year's energy. In four-sided buildings, especially class and apartment complexes, there are +75, 105, +165 and -15 best ones. In this regard, 29.5 percent of the solar energy is related to the warm year and 70.5 percent of the energy to the cold season