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Heat loss through a composite wall of three materials.xls
 
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Description:

KNOWN: Thicknesses of three materials which form a composite wall and thermal conductivities of the two materials. Inner and outer surface temperatures of the composite: also, temperature and convection coefficient associated with adjoining gas.
FIND: Value of unknown thermal conductivity, kB.
ASSUMPTIONS: 1) Steady-state conditions
2) One-dimensional conduction
3) Constant properties
4) Negligible contact resistance
5) Negligible radiation effects
ANALYSIS: Analogy with thermal circuit.

Calculation Reference
Fundamentals of Heat and Mass Transfer - Frank P. Incropera

Submitted By:
John Doyle (JohnDoyle[Admin])
Submitted On:
29 Jan 2008
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81.00Kb
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