A composite plane wall consists of a 3-in.-thick layer of insulation (ks = 0.029 Btu/h ft...

 

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A composite plane wall consists of a 3-in.-thick layer of insulation (ks = 0.029 Btu/h ft R) and a 0.75-in.-thick layer of siding (ks = 0.058 Btu/h ft °R). The inner temperature of the insulation is 67°F. The outer temperature of the siding is 8°F. Determine at steady state (a) the temperature at the interface of the two layers, in °F, and (b) the rate of heat transfer through the wall in Btu/h-ft2 of surface area. Part A Your answer is incorrect. Try again. Determine at steady state the temperature at the interface of the two layers, in °F. -.3333 T₂ = the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work SHOW HINT OF ▼ Part B Determine the rate of heat transfer through the wall in Btu/h-ft2 of surface area. (-/-) = Btu/h-ft² Attempts: 4 of 4 used A composite plane wall consists of a 3-in.-thick layer of insulation (ks = 0.029 Btu/h ft R) and a 0.75-in.-thick layer of siding (ks = 0.058 Btu/h ft °R). The inner temperature of the insulation is 67°F. The outer temperature of the siding is 8°F. Determine at steady state (a) the temperature at the interface of the two layers, in °F, and (b) the rate of heat transfer through the wall in Btu/h-ft2 of surface area. Part A Your answer is incorrect. Try again. Determine at steady state the temperature at the interface of the two layers, in °F. -.3333 T₂ = the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work SHOW HINT OF ▼ Part B Determine the rate of heat transfer through the wall in Btu/h-ft2 of surface area. (-/-) = Btu/h-ft² Attempts: 4 of 4 used

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Part A Temperature at the interface Calculate the thermal resistances Insulation Rinsulation Linsula... View the full answer