A study on the effect of shape of micro channel on performance of solar photovoltaic thermal collector

Using renewable source of energies is a vital decision due to declining in fossil fuels and also increasing the oil price. Solar energy is one of the best source of renewable energy that is accessible in the most parts the word. The aim of this study is increasing the efficiency of using solar energy to provide green energy for building. In this study used from a sample photovoltaic cell and three routes straight –spiral and circumflex for transition water fluid. To the intensity of the radiation level of cell 800 w m2 .fluid regime in channels is liminal. Solar cell is made of aluminum. For simulation software of fluent is used. Discretization of pressure is according to form standard and Discretization of momentum and energy is according to form second order upwind and coupling of pressurevelocity is according to from simple algorithm. covergencing of factor is for continuity 5 10 and for energy equation 6 10 . The result shows that with increasing in the number of Reynolds, cell surface temperature and outlet fluid temperature decreases. Pressure drop in circumflex rout is about 4% higher of straight rout and 1.3 % of spiral route.

Keywords:

Pvt , Thermal efficiency , Electrical efficiency