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Optimized electrode arrangement in solar air heater

Author

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  • Kasayapanand, N.
  • Kiatsiriroat, T.

Abstract

Laminar forced convection inside the solar air heater with various wire electrode arrangements are numerically examined for heat transfer enhancement using electrohydrodynamic technique. The electric field is generated by the wire electrodes charged with DC high voltage ranging from 7.5 to 17.5kV. Reynolds number corresponding to the flow considered is between 100 and 2000. The numerical modeling of computational fluid dynamics includes the interactions among electric field, flow field, and temperature field. It is found that the enhancement of heat transfer coefficient with the presence of electric field increases in relation with the supplied voltage but decreases when the Reynolds number and the distance between electrode and channel surface are augmented. The optimized electrode arrangement, which obtains the best heat transfer enhancement is investigated incorporating with the pressure drop consideration. The heat transfer enhancement is also depended on the number of electrodes per length and the channel dimension.

Suggested Citation

  • Kasayapanand, N. & Kiatsiriroat, T., 2006. "Optimized electrode arrangement in solar air heater," Renewable Energy, Elsevier, vol. 31(4), pages 439-455.
    • Handle: RePEc:eee:renene:v:31:y:2006:i:4:p:439-455
    DOI: 10.1016/j.renene.2005.04.014
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    References listed on IDEAS

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    1. Verma, S.K & Prasad, B.N, 2000. "Investigation for the optimal thermohydraulic performance of artificially roughened solar air heaters," Renewable Energy, Elsevier, vol. 20(1), pages 19-36.
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    Cited by:

    1. Golzari, Soudabeh & Kasaeian, Alibakhsh & Amidpour, Majid & Nasirivatan, Shahin & Mousavi, Soroush, 2018. "Experimental investigation of the effects of corona wind on the performance of an air-cooled PV/T," Renewable Energy, Elsevier, vol. 127(C), pages 284-297.
    2. Kasayapanand, N. & Kiatsiriroat, T., 2007. "Optimized mass flux ratio of double-flow solar air heater with EHD," Energy, Elsevier, vol. 32(8), pages 1343-1351.
    3. Saxena, Abhishek & Varun, & El-Sebaii, A.A., 2015. "A thermodynamic review of solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 863-890.
    4. Kasayapanand, Nat, 2008. "Enhanced heat transfer in inclined solar chimneys by electrohydrodynamic technique," Renewable Energy, Elsevier, vol. 33(3), pages 444-453.
    5. Hu, Jianjun & Guo, Meng & Guo, Jinyong & Zhang, Guangqiu & Zhang, Yuwen, 2020. "Numerical and experimental investigation of solar air collector with internal swirling flow," Renewable Energy, Elsevier, vol. 162(C), pages 2259-2271.

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