Natural convection heat transfer within multi-layer domes

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Journal titleInternational Journal of Heat and Mass Transfer
IssueMay 10
Pages19731981; # of pages: 9
AbstractDomes have become increasingly popular in modern building designs. Glazed domes are used to bring daylight and solar heat into the indoor space. For domes with multiple spaced layers of glazings, there is little information available on natural convection heat transfer within these layers. This information is required for the evaluation of the dome thermal performance (e.g., the U-factor). This paper presents a numerical study on heat transfer by laminar natural convection within multi-layer domes with uniform spacing heated from the outside. The flow and temperature fields within the domed enclosure were obtained using the control volume approach combined with the fully implicit scheme. Correlations for the heat transfer as a function of the dome shape and the gap spacing between the layers were developed under steady state conditions. The results showed that the convection heat transfer for fully hemispheric domes (half of spheres) may reach more than 13% higher than that for low profile domes (hemispherical caps) for small gap spacings (gap spacing-to-radius ratio. The critical gap spacing that yields the maximum heat transfer was quantified for each dome shape.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number43954
NPARC number20331286
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Record identifier3b1bbeb2-84a5-40de-8db0-7b1ca1a842b2
Record created2012-07-18
Record modified2016-05-09
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