Performance Evaluation on Double Pass Solar Air Heater with Broken Multiple V-Type Baffles- A Review

Abstract

Thermal performance of double pass solar air heater has been found to be improved by the use of artificial roughness provided on the both side of the absorber plate. The roughness provided on the absorber plate for increasing the heat transfer is also used to increase the pressure drop due increased friction. The heat transfer enhancement of absorber plate has been experimentally determined by using v-shaped baffle with multiple gaps. An experimental study will be carried out to analyze the effect of v-shape with gap baffles used as roughness geometry on heat transfer along its friction factor. The heat transfer and friction factor data obtained from the experiment is compared with the data obtained from smooth duct under the same condition. Correlation will also develop for Nusselt number (Nu) and friction factor (f) as a function of roughness and flow parameter. The maximum enhancement in the Nusselt number and friction factor is observed.