Published Paper Details:

In this work effect of V, W and S -Shape ribs absorber plate on heat transfer enhancement of solar air heater has been discussed. Three different types of absorber plate have been used. The absorber plates have V, W and S - shape ribs. It is observed that the highest thermal efficiency is found out to be for black colour plate with continuous multiple S -shape ribs at all the exit wind velocity. All absorber plates have metallic black color painted. It is determined that the maximum heat transfer was at V-Shape, W-Shape plate with continuous multiple S- shaped absorber plate at all the exit wind velocity because the path of air has increased as compare to V Shape and W Shape absorber plate. Increased path depends on geometry was equally spaced and air flowing from inlet to outlet in between ribs of plate channel. The efficiency of V-Shape, W-Shape ribs absorber plate solar air heaters is low because of low heat transfer coefficient between the absorber plate and the flowing air. Solar air heaters are used at low to medium temperature application like industrial application, space heating, crop drying and other. A direct performance comparison of the V-Shape, W-Shape ribs absorber plate and continuous multiple S-shape ribs absorber plate solar air heater shows that the thermal efficiency of the continuous multiple S-shaped ribs absorber plate solar air heater is 25% higher than the V-Shaped and W-Shape ribs absorber plate solar air heater; highest thermal performance advantage is at the lowest flow rate. The collector efficiency in a solar air heater without and with using embossed absorbing plate has been investigated experimentally analyzed that depends on different parameter like inclination angle, radiation and velocity of air etc.