Chapter 15 Steady Heat Conduction3-57 A composite wall consists of several horizontal and vertical layers. The left and right surfaces of the wall are maintained at uniform temperatures. The rate of heat transfer through the wall, the interface temperatures, and the temperature drop across the section F are to be determined. Assumptions1Heat transfer is steady since there is no indication of change with time. 2 Heat transfer through the wall is one-dimensional.3 Thermal conductivities are constant.4 Thermal contact resistances at the interfacesare disregarded. PropertiesThe thermal conductivities are given to be kA= kF= 2, kB= 8, kBC= 20, kD= 15, kE= 35 W/m⋅°C. Analysis(a) The representative surface area is A=×=012 1 012..m2. The thermal resistance network and the individual thermal resistances are T1R1R3R2R4R5R6R7T2C/W16.0)m04.0(C)W/m.8(m05.0C/W06.0)m04.0(C)W/m.20(m05.0C/W04.0)m12.0(C)W/m.2(m01.0
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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.