Experimental Investigation of Double Pass Solar Air Heater using different type of Porous Media

Abstract

An experimental investigation was carried out to study the effect of porous media (Glass wool and Steel wool) on double pass solar air heater. The aim is to analyse the thermal efficiency of double pass solar air heater using different type of porous media. The measured parameters were temperature difference, air velocity, pressure difference, mass flow rate of the air. Porous media provide large area for the heat transfer have high heat transfer coefficient. This increases the thermal efficiency of the double pass solar air heater with porous media (glass and steel wool) to non- porous media. In this investigation, thermal efficiency of the double pass solar air heater with porous media is more efficient than the single pass solar air heater with porous media.