NATURAL CONVECTION HEAT TRANSFER WITHIN VERTICALLY ECCENTRIC DOMED SKYLIGHTS CAVITIES
Domed skylights are important architectural design elements to deliver daylight and solar heat into buildings and connect buildings occupants to outdoor. However, most of building energy simulation programs do not cover such skylights to quantify their energy performance when installed in buildings. This paper presents a numerical study on natural laminar convection within vertically eccentric domed cavities when heated from the exterior surface. Both interior and exterior surfaces are held at uniform temperatures. A commercial CFD package employing the control volume approach is used to solve the laminar convective heat transfer within the cavity. The obtained results showed that the flow is mono-cellular for small and moderate heating intensities as depicted by the Grashof number. For high Grashof numbers, small vortex cells appear within a larger vortex cell at the lower part of the cavity. The multi-cellular flow increases heat transfer. The critical gap spacing that yields the maximum heat transfer was quantified for several dome profiles.
Natural laminar convection domed cavity domed skylight, eccentric domed cavity
A.Sartipi A.Laouadi D.Naylor R.Dhib
Department of Mechanical and Industrial Engineering, Ryerson University, National Research Council of Canada, Department of Chemical Engineering, Ryerson University,
国际会议
北京
英文
2007-09-03（万方平台首次上网日期，不代表论文的发表时间）