عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Domed roofs are the masterwork of mechanical engineering because of building heat load reduction in Iran. Received solar radiation on a domed and flat roof has been compared with each other experimentally and numerically in this research. Data measurements have been done on 15th day of each month from sunrise to sunset with one hour intervals. A 1/10 scaled model of a mosque in Yazd has been used for experimental investigation. Data obtained on 13 point on this model. The dome has three circuits named A, B and C, with a horizontal angle of 30o, 50o and 90o respectively. Four points on every circuit in the four main directions are considered. Results show that the total received solar radiation (per unite area of dome base) for flat roof is higher than domed roof. The maximum solar radiation received on the East and South direction for warm and cold seasons respectively for domed roof. The minimum solar radiation received on the North direction during a year. The maximum solar radiation on the East direction is received in the early morning, while the West has its maximum in the late afternoon. In addition the maximum received solar radiation for the flat roof and the South direction of the dome occur at approximately noon, while the maximum received solar radiation tends to be happened before noon for the North direction.