Effective efficiency evaluation is one of the important parameters in designing and selection SAH. In this research article author have evaluated effective SAH using different coarseness configuration attached to underside collector used by various research. Correlation developed researchers for has been efficiency. each compared suggested that which be on basis comparison.

Due to the reduction of fossil resources, replacement renewable energy sources such as solar has become mandatory. Solar does not contain pollution and widely available in all parts world, especially warm regions. Our country (IRAN) is geographically located a hot dry region, with more than 280 sunny days per year, one nonpower applications heating space water consumption building using thermal...