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The intensification of the heat transfer in passive solar systems using grid generated turbulence: Spectral study

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  • Maad, Ben
  • Belghith, A.

Abstract

In order to improve heat transfer in passive solar systems such as Trombe-wall or solar chimmey, grid generated turbulence was used. The experimental results showed that flow was no longer laminar, so the hydrodynamic and thermal fields became very unstable. In spite of the decrease of the volumetric air flow, the temperature in the middle of the channel was high and reached 50% of the wall temperature. The average Nusselt number increased according to the quality of grid arrangements. To understand better the grid effect, the turbulent energy spectrum was investigated.

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  • Maad, Ben & Belghith, A., 1994. "The intensification of the heat transfer in passive solar systems using grid generated turbulence: Spectral study," Renewable Energy, Elsevier, vol. 4(3), pages 319-325.
    • Handle: RePEc:eee:renene:v:4:y:1994:i:3:p:319-325
    DOI: 10.1016/0960-1481(94)90035-3
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    1. Maad, R.Ben & Belghith, A., 1992. "The use of grid-generated turbulence to improve heat transfer in passive solar systems," Renewable Energy, Elsevier, vol. 2(3), pages 333-336.
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    Cited by:

    1. Mahmoud, Ahmedou Ould Mohamed & Maad, Rejeb Ben & Belghith, Ali, 1998. "Production of hot air with quasi uniform temperature using concentrated solar radiation," Renewable Energy, Elsevier, vol. 13(4), pages 481-493.

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    1. Mahmoud, Ahmedou Ould Mohamed & Maad, Rejeb Ben & Belghith, Ali, 1998. "Production of hot air with quasi uniform temperature using concentrated solar radiation," Renewable Energy, Elsevier, vol. 13(4), pages 481-493.

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