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Effect of nano cupric oxide coating on the forced convection performance of a mixed-mode flat plate solar dryer

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  • Sivakumar, S.
  • Velmurugan, C.
  • Dhas, D.S. Ebenezer Jacob
  • Solomon, A. Brusly
  • Dev Wins, K. Leo

Abstract

In this study, mixed mode solar dryer of forced convection type, integrated with a CuO nanoparticle coated flat plate solar collector was developed and its effectiveness of drying maize under the meteorological conditions of Coimbatore, India was evaluated. The aforementioned setup entails a solar collector (flat plate type) with 3 drying trays and a centrifugal blower. The conventional solar absorber plate was made up of aluminium, which was coated with black paint. Another modified solar absorber plate was made up of aluminium with a coating of black paint with two different vol% of CuO nanoparticles (0.02% and 0.04%), for improving the heat transfer rate. Performance tests on the modified dryer were carried out at constant air flow rate (1.5 m3/min) and the results were compared with the conventional type. The efficiency of the collector got improved by 4% while using black paint with 0.04 vol% of CuO nanoparticle coated absorber. Also the drying time got reduced by 6%, when compared to conventional type dryer. Also the collector temperature recorded in the black paint with 0.04 vol% CuO nano-particle coated collector was higher compared to black paint coated and black paint with 0.02 vol% CuO nanoparticle coated collector.

Suggested Citation

  • Sivakumar, S. & Velmurugan, C. & Dhas, D.S. Ebenezer Jacob & Solomon, A. Brusly & Dev Wins, K. Leo, 2020. "Effect of nano cupric oxide coating on the forced convection performance of a mixed-mode flat plate solar dryer," Renewable Energy, Elsevier, vol. 155(C), pages 1165-1172.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:1165-1172
    DOI: 10.1016/j.renene.2020.04.027
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