A gas at 525 ° C flows through an AISI 316 stainless steel pipe (d.i = 94 mm and d.o. = 100 mm). The pipe is covered with a covering of mineral wool granules with 35 mm thick asbestos binders. The pipe is exposed to ambient air at 25 ° C. The heat transfer coefficients for the surrounding gas and air are 29 W / (m2 K) and 12W / (m2 K), respectively. Do the following: (a) Draw a schematic diagram and the thermal resistances of the scheme b) Calculate the critical radius and indicate if the coating increases or decreases heat transfer c) Calculate the heat loss per meter of tube length with the covering. d) Estimate the temperature on the surface of the coating exposed to the environment
A gas at 525 ° C flows through an AISI 316 stainless steel pipe (d.i = 94 mm and d.o. = 100 mm). The pipe is covered with a covering of mineral wool granules with 35 mm thick asbestos binders. The pipe is exposed to ambient air at 25 ° C. The heat transfer coefficients for the surrounding gas and air are 29 W / (m2 K) and 12W / (m2 K), respectively.
Do the following:
(a) Draw a schematic diagram and the thermal resistances of the scheme
b) Calculate the critical radius and indicate if the coating increases or decreases heat transfer
c) Calculate the heat loss per meter of tube length with the covering.
d) Estimate the temperature on the surface of the coating exposed to the environment
According to Bartleyby's policy we shall solve only 3 subparts of a question. If you want the last part please post it seperately.
Step by step
Solved in 2 steps with 2 images
