A steel pipe with 5 cm OD is covered with a 6 4 mm asbestos insulation k 0 096 Btu h ft F followed by a 2 5 cm layer of fiberglass insulation k 0 028 Btu h ft F The pipe wall temperature is 315C, and the outside insulation temperature is 38C Calculate the interface temperature between the asbestos ...

A steel pipe with 5-cm OD is covered with a 6.4-mm asbestos insulation [k = 0.096 Btu/h

Question:

A steel pipe with 5-cm OD is covered with a 6.4-mm asbestos insulation [k = 0.096 Btu/h ∙ ft ∙ ºF] followed by a 2.5-cm layer of fiberglass insulation [k = 0.028 Btu/h ∙ ft ∙ ºF]. The pipe-wall temperature is 315ºC, and the outside insulation temperature is 38ºC. Calculate the interface temperature between the asbestos and fiberglass.