Repeat Problem 3 48, assuming that the outer wall is exposed to an environment at 38C and that the convection heat transfer coefficient is 17 W m2 C Assume that the inner surface temperature is maintained at 650C Problem 3 48 For the wall in Problem 3 6 a material with k 1 4 W m C is used The inner...

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Repeat Problem 3-48, assuming that the outer wall is exposed to an environment at 38C and that

Question:

Repeat Problem 3-48, assuming that the outer wall is exposed to an environment at 38ºC and that the convection heat-transfer coefficient is 17 W/m2 · ºC. Assume that the inner surface temperature is maintained at 650ºC.
Problem 3-48
For the wall in Problem 3-6 a material with k = 1.4 W/m· ºC is used. The inner and outer wall temperatures are 650 and 150ºC, respectively. Using a numerical technique, calculate the heat flow through the wall.
Problem 3-6
A heavy-wall tube of Monel, 2.5-cm ID and 5-cm OD, is covered with a 2.5-cm layer of glass wool. The inside tube temperature is 300ºC, and the temperature at the outside of the insulation is 40ºC. How much heat is lost per foot of length? Take k = 11 Btu/h · ft · ºF for Monel.