Heat transfer coefficient and friction factor correlations for rectangular solar air heater duct having transverse wedge shaped rib roughness on the absorber plate

As is well known, the heat transfer coefficient of a solar air heater duct can be increased by providing artificial roughness on the heated wall (i.e. the absorber plate). Experiments were performed to collect heat transfer and friction data for forced convection flow of air in solar air heater rect...

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Bibliographic Details
Published in:Renewable energy 2002-03, Vol.25 (3), p.341-369
Main Authors: Bhagoria, J.L, Saini, J.S, Solanki, S.C
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Equipments, installations and applications
Exact sciences and technology
Friction
Heat transfer
Natural energy
Solar air heater
Solar energy
Solar thermal conversion
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Summary:As is well known, the heat transfer coefficient of a solar air heater duct can be increased by providing artificial roughness on the heated wall (i.e. the absorber plate). Experiments were performed to collect heat transfer and friction data for forced convection flow of air in solar air heater rectangular duct with one broad wall roughened by wedge shaped transverse integral ribs. The experiment encompassed the Reynolds number range from 3000 to 18000; relative roughness height 0.015 to 0.033; the relative roughness pitch 60.17 φ −1.0264< p/ e
ISSN:0960-1481
1879-0682
DOI:10.1016/S0960-1481(01)00057-X