Everyday Heat Transfer Problems: Sensitivities to Governing Variables

By
M. Kemal Atesmen
M. Kemal Atesmen
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ISBN:
9780791802830
No. of Pages:
238
Publisher:
ASME Press
Publication date:
2009

Heat loss from the vertical walls of a house is analyzed under steady-state conditions. Walls are assumed to be large and built in a planar fashion, so that one-dimensional heat transfer rate equations in rectangular coordinates may be used, and only conduction and convection heat transfer mechanisms are considered. In this analysis, radiation heat transfer effects are neglected. No air leakage through the wall was assumed. Also, the wall material thermal conductivities are assumed to be independent of temperature in the region of operation.

Assuming winter conditions—the temperature inside the house is higher than the temperature outside the house—the convection heat transferred from the inside of the house to the inner surface of the inner wall is:
$Q∕A−hin(Tin−Tinner wall inside surface)$
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