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Parametric study of a flat plate wick assisted heat pipe solar collector

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3 Author(s)
Brahim, T. ; Lab. d''Etudes des Syst. Thermique et Energetique (LESTE), Ecole Nat. d''Ing. de Monastir, Monastir, Tunisia ; Mhiri, F. ; Jemni, A.

The use of heat pipes in solar collectors offers several advantages regarding flexibility in operation and application, as they are very efficient in transporting heat even under a small temperature difference. Compared with other systems powered by evacuated tube collectors or flat plate solar collectors using a wickless heat pipe, little attention has been paid to flat plate solar collectors wick assisted heat pipe. In this paper, an analytical model based on energy balance equations assuming a steady state condition were developed to evaluate the thermal efficiency of a flat plate wick assisted heat pipe solar collector. Parameters which affect the collector efficiency are identified such as, tube spacing distance, gap spacing between the absorber plate and the glazing cover and the emissivity of the absorber plate. The results reflect the contribution and significance of each of these parameters to the collector overall heat loss coefficients. Three heat pipe working fluid are examined and results shows that acetone perform better than methanol and ethanol.

Published in:

Renewable Energies and Vehicular Technology (REVET), 2012 First International Conference on

Date of Conference:

26-28 March 2012