Thermal Performance of Double Slope Collectors with Different Angles

Abstract

The air solar collectors are one of the necessary equipment for heating by increase the induced air temperatures. The thermal analysis of the solar air collector for the three different absorbers, flat and double slope (15, 30) degrees was studied numerically by employing a FORTRAN 90 program. The 3D steady-state forced convection turbulent technique was used to solve the Navier-Stokes with energy equations. The turbulence effect was modeled by using k-ε two equation model. The discretization of governing equations was done by finite volume technique. The test is carried out under the weather conditions of the Baghdad-Iraq region during the month of Jun. The results exhibit that the air temperatures increase when used the double slope collector, also the performance of air solar collector is enhanced thermally. The average 15° angle plate is higher than the flat and the 30° angle plates from 8am to 11am and from 1pm to 6pm, it is best slope angle.