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

Ben Maad and A. Belghith

Renewable Energy, 1994, vol. 4, issue 3, 319-325

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.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:4:y:1994:i:3:p:319-325

DOI: 10.1016/0960-1481(94)90035-3

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