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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
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9.92  Consider a horizontal flat roof section having the same dimensions as a vertical wall section. For both sections, the surfaces exposed to the air gap are at 18°C (inside) and -10°C (outside).

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1 m
Horizontal roof section
3 m
Baffle, part b
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Air
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0.1 m
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(a)Â Â Â Estimate the ratio of the convection heat rate for the horizontal section to that of the vertical section.
(b)Â Â Â What effect will inserting a baffle at the mid-height of the vertical section have on the convection heat rate for that section?
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