engleski

Basic solar chimney flow improvements

This paper deals with the numerical analysis procedure and results of air flow simulation through solar chimney. Because of low Reynolds numbers, some aerodynamic improvements could be obtained. Paper links input heat energy with geometry or air flow parameters. Basic solar chimney geometry is carried out and analyzed with CFD application in three dimensional domains. Main assumption is to reach the optimal fractional pressure drop across turbines and maximal electric energy production by solar chimney geometry adaptation. Results are numerically tested by known parameters in two stages. In first basic flow is tested for comparison and procedure calibration. In the second improvements are applied and tested. Various shapes of internal solar chimney geometry are applied and the best for given input parameters are extracted. Also, some external geometry shape solutions are investigated. Test includes comparison to the known measured air flow results in similar solar chimney (Manzanares, Spain). Results provided validate the assumptions and could be a base for further experimental investigations.

solar chimney; three dimensional flow analysis; optimal fractional pressure drop

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