V-groove Absorber Plate Design Investigation for Flat Plate Solar Collector Using Numerical Simulation
AbstractThe poor thermal performance of the flat plate solar collector has been a major drawback in harnessing solar energy for small heating applications. Flat plate solar collector converts the direct and indirect solar radiation to useful heat gain, the primary energy conversion process occurs in the absorber plate and then the heat is transferred to a fluid. The present study is aimed at investigating several design parameters of the v-groove absorber plate to enhance the thermal performance of the flat plate solar collector. The investigation was conducted numerically using computational fluid dynamics techniques for various design parameters specifically v-groove apex angle, absorber plate height, and v-groove triangular channels shape. The simulation results and procedures were validated against available experimental data from literature and found to agree by a margin of 0.66%. The absorber height was found to have a significant influence on the thermal performance of the flat plate solar collector and the thermal efficiency was enhanced by 29%. It was concluded that modifying the corners of the triangular channels of the v-groove absorber plate increases the coefficient of convection heat transfer, however, it has a moderate influence on the overall thermal performance of the flat plate solar collector.
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