Chapter 15 Steady Heat ConductionC/W065.0025.004.01,1°=+=+=midtotalRRRThen the temperature at the point where The sections B, D, and E meet becomes C263°=°−°=−=⎯→⎯−=C/W)W)(0.065571(C30011totaltotalRQTTRTTQ&&(c) The temperature drop across the section F can be determined from C143°=°==Δ⎯Δ=C/W)W)(0.25571(FFRQTRTQ&&3-59 A coat is made of 5 layers of 0.1 mm thick synthetic fabric separated by 1.5 mm thick air space. The rate of heat loss through the jacket is to be determined, and the result is to be compared to the heat loss through a jackets without the air space. Also, the equivalent thickness of a wool coat is to be determined. Assumptions1Heat transfer is steady since there is no indication of change with time. 2 Heat transfer through the jacket is one-dimensional.3 Thermal conductivities are constant.4 Heat transfer coefficients account for the radiation heat transfer. PropertiesThe thermal conductivities are given to be k= 0.13 W/m⋅°C for synthetic fabric, k= 0.026 W/m⋅°C for air, and k= 0.035 W/m⋅°C for wool fabric. AnalysisThe thermal resistance network and the individual thermal resistances are
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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.