Rеvuе des Energies Renouvelables
Volume 23, Numéro 1, Pages 41-58
2020-11-06
Numerical Approach Of A Fully Developed Flow In A Solar Collector Adapted To The Climate Of Southwest Algeria
Authors : Hami Khelifa .
Abstract
The present work has been conducted with the aim of contributing to the study of heat transfer phenomena in an air solar collector, which deal with transient heat transfer properties and mechanisms. The improvement of heat transfer in the studied system is characterized by the development of the flow between the absorption of cold air and the evacuation of hot air. The equations, which govern the problem dealt with, are those of turbulent and incompressible flows written in Reynolds decomposition for velocity, pressure and temperature, in a mean component and a term of fluctuation, and expressing the conservation of the mass, of the amount of movement and energy. To close the set of transport equations, the turbulence model k-ε was used. We will, therefore, use this model of turbulence with improved treatment of wall laws (Enhanced wall treatment), with the intention of solving the laminar sub-layer. The simulation results obtained are valid for temperature values between (30 °C - 50 °C) for heating flows between (200 w / m2 - 800 w / m2), the average volume flow obtained is equal to 0.3 m3/s. These results are essential for the passive heating of buildings and the drying of agrifood products.
Keywords
Solar energy ; Solar collector ; Convection ; Turbulence flows
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