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IJSTR >> Volume 7 - Issue 8, August 2018 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Effect Of Enclosed Air Gap And Empty Gap For Thermal Screens In PV Cells Isolation Inside The Hybrid Photovoltaic-Thermal Channel On A Rooftop Designed For Natural Ventilation In Bioclimatic Buildings

[Full Text]



Y. Nougbléga, K. Kpode, K. Atchonouglo, M. Banna, J.C.Dupré



Empty air gap, Enclosed air gap, Mixed convection, Hybrid Photovoltaic/Thermal collectors, Thermal and electrical Efficiencies.



The present paper reports numerical investigation results of mixed convection in the inclined Hybrid Photovoltaic–Thermal (PV/T) channel using the empty or enclosed air gaps for the solar PV cells isolation. The aim of this work is to evaluate streamlines and isotherms patterns in order to analyze the effect of thermal screens on PV/T Performances using a stream function-vorticity formulation. Results are presented in terms of streamlines, isotherms, outlet velocity, heat transfer, electrical output and thermal efficiency of the PV/T with variation in control parameters such as Reynolds number (2  Re  250), the Grashof number(10  Gr 106), the Aspect ratio (2  A  10), and the enclosed air gap width (0%  B  60%). The results show that empty and enclosed air gaps can respectively significantly improve electrical efficiency and air draught reducing back flow in the channel.



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