REVIEW ON PERFORMANCE OF DOUBLE PASS SOLAR AIR HEATER WITH AND WITHOUT BAFFLES

In order to enhance rate of heat transfer to flowing air in the duct of a solar air heater (SAH), baffles on the absorber plate is considered to be an effective technique. Investigators reported various baffles geometries in literature for studying heat transfer and friction characteristics of an baffles duct of solar air heaters. In the present paper an attempt has been made to categorize and review the reported baffles used for increasing performance in Double Pass Solar Air Heaters (DPSAHs). Heat transfer coefficient and friction factor correlations developed by various investigators for baffles of solar air heaters have also been reported in the present paper