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CONVECTION SUPPRESSION IN A TRIANGULAR-SHAPED ENCLOSURE

Volume 1, Issue 3, 2009, pp. 309-321
DOI: 10.1615/ComputThermalScien.v1.i3.40
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ABSTRACT

The use of convection suppression devices has been widely discussed in the literature as a means of reducing natural convection heat loss from the front surface of glazed solar collectors. In this study, the use of baffles in an attic-shaped enclosure was examined as a possible low-cost means of suppressing heat loss by natural convection from the rear surface of a roof-integrated solar collector. To determine the effect of baffles in the attic-shaped enclosure, a three-dimensional triangular cross-sectioned enclosure with a vertical aspect ratio of 0.5 and a horizontal aspect ratio of 3.3 was modeled. The flow patterns and heat transfer in the enclosure were determined for Grashof Numbers in the range of 106−107 using a commercially available finite volume CFD solver. It was found that the use of a single adiabatic baffle mounted vertically downward from the apex, and extending the length of the enclosure, would alter the flow such that the heat transfer due to natural convection was reduced as the length of the baffle was increased.

CITED BY
  1. Saha Suvash C., Khan M.M.K., A review of natural convection and heat transfer in attic-shaped space, Energy and Buildings, 43, 10, 2011. Crossref

  2. Anderson T.N., Duke M., Carson J.K., Experimental determination of natural convection heat transfer coefficients in an attic shaped enclosure, International Communications in Heat and Mass Transfer, 37, 4, 2010. Crossref

  3. Anderson T.N., Duke M., Carson J.K., Suppression of natural convection heat transfer coefficients in an attic shaped enclosure, International Communications in Heat and Mass Transfer, 37, 8, 2010. Crossref

  4. Piratheepan M., Anderson T.N., Natural convection heat transfer in façade integrated solar concentrators, Solar Energy, 122, 2015. Crossref

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