Problem ${?}_5$

$5$:$30$ pm on Oct $24$ th $2024$

Pressurized hot water at is $300C$ fows in a heavy walled carbon$-$manganese$-$silicon steel tube $40$ mm $).$ The thermal conductivity of the steel is $40\frac{W}{mK}.$ The pip is surrounded by air at $20C.$ The convection heat transfer coefficients are $h.$

a$)$ Draw the skerme the heat transfer rate per unit length of the tube.

b$)$ Deternute the outer surface temperature of the bare pipe.

d$)$ It is proposed to insulate the tube with fiberglass insulation