Solar energy is the cleanest and the most environmental friendly available power source. The use of solar energy in the recent years has reached a remarkable edge. Solar energy collectors are special kinds of heat exchangers that transform solar radiation energy to internal energy of the transport medium. The main objective of this work is evaluation of the advantages of the solar energy for securing domestic energy in the city of Dehloran, Ilam province, Iran. The mean ambient temperature of this region in the summer and winter are in the range of 28–48.9°C and 16.4–24.9°C, respectively. Because of its sunny sky almost throughout the year, the temperature of this city is high. The results showed that by considering the specific condition of Dehloran city, utilizing solar collectors is useful for securing domestic energy in economical aspects.
