Abstract
The focus of this paper is on a thermal performance of the window solar air collector with seven-moveable circular perforated absorbent plates that controlled manually. The proposed window solar air collector is a solar thermal system which can be employed to preheat the ventilation air supply and compromise between sunlight penetration to the desired buildings and hot air gain. In this work, five angles are selected (0 °, 30 °, 45 °, 60 °, and 90 °) and mathematical model and formulation based on the finite volume scheme (SIMPLE) algorithm has been implemented to solve the 3-D forced convection with turbulent flow. Different values of solar irradiance intensities (330, 530, and 730 W/m2) and air mass flow rates (0.0097, 0.0151, 0.0224, and 0.0298 kg/s) were adopted. The results found significant difference between air inlet and outlet temperatures are gained at angle 0° (vertical absorbent plates position) at irradiance 730 W/m2 and mass flow rate 0.0097 kg/s is 11.2 °C and the maximum thermal efficiency is 71% at a mass flow rate of 0.0298 kg/s. Also, flexibility between hot air from the collector and sunlight penetrating into the room is gained when the plate angles set on (30 °, 45 °, 60 °, and 90 °).
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