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Enhanced heat transfer in inclined solar chimneys by electrohydrodynamic technique

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  • Kasayapanand, Nat

Abstract

Heat transfer enhancement of natural convection inside the inclined solar chimneys is investigated using electrohydrodynamic technique. The interactions between electric field, flow field, and temperature field are analyzed. The ranges of parameters considered are 104⩽Ra⩽107, 7.5kV⩽V0⩽17.5kV, 30°⩽θ⩽120°, and 2⩽aspect ratio⩽14. Flow and heat transfer enhancements are significantly influenced at low Rayleigh number. The optimum inclined angle which obtains maximum volume flow rate and heat transfer is found to be at θ=60°. A maximum volume flow rate enhancement is expressed in relation with the number of electrodes. The relation between aspect ratio of chimney and number of electrodes that performs the optimum condition between efficiency and economy is analyzed incorporating with all concerning parameters.

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  • Kasayapanand, Nat, 2008. "Enhanced heat transfer in inclined solar chimneys by electrohydrodynamic technique," Renewable Energy, Elsevier, vol. 33(3), pages 444-453.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:3:p:444-453
    DOI: 10.1016/j.renene.2007.03.014
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    1. Kasayapanand, N. & Kiatsiriroat, T., 2006. "Optimized electrode arrangement in solar air heater," Renewable Energy, Elsevier, vol. 31(4), pages 439-455.
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    5. Ekechukwu, O.V. & Norton, B., 1997. "Design and measured performance of a solar chimney for natural-circulation solar-energy dryers," Renewable Energy, Elsevier, vol. 10(1), pages 81-90.
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    1. Kasaeian, A.B. & Molana, Sh. & Rahmani, K. & Wen, D., 2017. "A review on solar chimney systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 954-987.

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