Experimental Study of Heat Transfer and an Effect the Tilt Angle with Variation of the Mass Flow Rates on the Solar Air Heater

Abstract

in this study we have been indicated an effect of tiltangle and the mass flow rates onto the thermal performance of a single pass solar air heater will be investigatedexperimentally. The effects of mass flow rate of air on theoutlet temperature, the heat transfer in a solar collector andthermal efficiency were studied. Experiments were performedfor range of air mass flow rates from 0.0078 to 0.0166 kg/s.,Moreover; the maximum efficiency was obtained at the difference’s mass flow rates. The maximum efficiency obtained for the 0.0078, 0.0093, 0.0125 and 0.0166 kg/s were47.82%, 37.50%, 31% and 26% respectively. Comparison of the results as an effect the mass flow rates by solar collectorsand the tilt angle a substantial enhancement in the thermalefficiency. The optimal tilt angles for the outlet temperaturewere between 20 and 30°.

Link http://fr.scribd.com/doc/157897009/Experimental-Study-of-Heat-Transfer-and-an-Effect-the-Tilt-Angle-with-Variation-of-the-Mass-Flow-Rates-on-the-Solar-Air-Heater