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Wall temperature experimental investigation in a thermally driven channel

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  • Nguyen, P.H.
  • Yerro, P.
  • Bernard, J.L.
  • Sellitto, P.
  • Dupont, M.

Abstract

Direct local wall temperature has been measured, in a steady state, along a vertical air channel asymmetrically heated with uniform fluxes. In the range of high Grashof numbers that was investigated, the flow regime probably remained laminar. A radiative part has been analysed with two extreme values of internal surface emissivity corresponding to unpainted metal and black painted wall. A correlation has been proposed for the calculation of a characteristic channel outlet value of the Nusselt number referred to air spacing. A local Nusselt number over the height has been developed in a power law scheme.

Suggested Citation

  • Nguyen, P.H. & Yerro, P. & Bernard, J.L. & Sellitto, P. & Dupont, M., 2000. "Wall temperature experimental investigation in a thermally driven channel," Renewable Energy, Elsevier, vol. 19(3), pages 443-456.
  • Handle: RePEc:eee:renene:v:19:y:2000:i:3:p:443-456
    DOI: 10.1016/S0960-1481(99)00008-7
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