Thermodynamics HW Solutions 159

Thermodynamics HW Solutions 159 - Chapter 3 Steady Heat...

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Unformatted text preview: Chapter 3 Steady Heat Conduction 3-11C The temperature of each surface in this case can be determined from & ( ) / ( & ) & ( ) / ( & ) Q T T R T T QR Q T T R T T QR s s s s s s s s = = = = + 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 where is the thermal resistance between the environment R i and surface i. 3-12C Yes, it is. 3-13C The window glass which consists of two 4 mm thick glass sheets pressed tightly against each other will probably have thermal contact resistance which serves as an additional thermal resistance to heat transfer through window, and thus the heat transfer rate will be smaller relative to the one which consists of a single 8 mm thick glass sheet. 3-14C Convection heat transfer through the wall is expressed as . In steady heat transfer, heat transfer rate to the wall and from the wall are equal. Therefore at the outer surface which has convection heat transfer coefficient three times that of the inner surface will experience three times smaller...
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This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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