Wednesday, August 23rd, 2017

Thermal radiation role in conjugate heat transfer across a multiple-cavity building block

Publication year: 2010brbSource:/b Energy, In Press, Corrected Proof, Available online 2 June 2010brMohamed A., AntarbrAccurate calculation of the heat transfer rate across building blocks may lead to significant energy savings. Conjugate heat transfer analysis is carried out numerically to compute the heat transfer rate/R-value as the number/layout of air-filled cavities is changed. Conduction heat transfer in the block material and both natural convection and radiation in the cavity were considered. It is found that increasing the number of cavities keeping the block width unchanged decreases the heat flux significantly. Five cavities can fit the building block under investigation without compromising the strength. Furthermore, changing the surface emissivity can increase the R-value substantially so that…

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