ENHANCEMENT OF HEAT TRANSFER IN TWO PASS SOLAR AIR HEATER DUCT USING MULTI V-SHAPED RIB GEOMETRY

Abstract

Energy is basic requirement for the development of nation. The consumption of energy is the index of prosperity of nation. So for the sake of development we should focus more and more on renewable energy sources. Solar energy is emerged as one of the best method of renewable energy source in current waking scenario. Therefore on the lines of contemporary energy requirements, this project is conducted to enhance heat transfer by means of using two pass solar air heater. We have used multi v-shaped discrete rib geometry on the back side of gi sheet roughened absorber plate while following ASHRAE standards. Experiment is conducted with keeping roughness pitch and roughness height constant along with angle of attack constant throughout with varying relative gap distance while keeping outlet temperature of smooth plate as a reference. The experimental outcome showed enhanced nusselt number and heat transfer co-efficient as comparison to smooth plate.