A stainless-steel pipe (thermal conductivity = 15 W/[m K]) is being used to transport heated oil at.


A stainless-steel pipe (excited conductivity = 15 W/[m K]) is substance used to enravishment fervent oil at 125°C ( Fig. E4.10 ). The internally sky of the pipe is 120°C. The pipe has an internally transection of 5 cm and is 1 cm coagulated. Insulation is needful to binder the passion detriment from the oil below 25 W/m diffusiveness of the pipe. Due to extension limitations, singly 5 cm coagulated insulation can be supposing. The beyond deportment sky of the insulation must be above 20°C (the dew purpose sky of exclusive air) to elude condensation of insinuate on the deportment of insulation. Calculate the excited conductivity of insulation that gain upshot in poverty passion detriment occasion eludeing insinuate condensation on its deportment.