Question

Insulation of steam pipes is an important aspect in industries to resist the heat loss from the steam pipe to the surrounding. In a typical steam pipe in an industry is made of steel( k=58w/mk) has inner diameter of 160mm and outside diameter of 170 mm. The saturated steam from a boiler flowing through the steam pipe is at 300C while the ambient air is at 50 C. The steel pipe has two layers of insulation the inner layer(k=0.17w/mc) is 30 mm thick and the outer layer (k=0.023W/mc) is 50mm thick and the inner and outer heat transfer coefficient are 30w/m^2C.find the rate of heat loss of steam pipe per unit length of the pipe

Answer 1