A Review on Optimization of Thermal Performance of Solar Air Heater with artificial Surface Roughness

Abstract

The requirement of energy across the globe is increasing at a distressing rate. The conventional sources of energy may no longer be able to meet the requisite demands. India being the second most populous country in the world having 20% of the total world population has a per capita energy consumption of 400 KWh. Hence, the need of hour is to hunt for the sources of energy which can lost longer and wouldn`t harm any forms of lives on the planet earth. Solar energy originating from sun is evolved by a series of chemical reactions that convert about 65*107 tons of Hy drogen to Helium every second. The energy from sun at a distance of 1.5*108 Km reaches the surfaces of collector plates installed on buildings and structures in beam and diffused forms of electromagnetic radiations. The former is called as direct radiation since they don`t change direction while travelling while as latter are subjected to scattering, absorption, re-radiations and re- reflections in the atmosphere.