Ametal pipe with an outside diameter (od) of 12cm is covered with an insulation material [k-0.07w/m.°c] of 2.5cm thick. if the outer pipe wall is at 100°c and the outer surface of the insulation is at 20°c, find the heat loss from the pipe per meter length

Q= 65.57 W

Explanation:

Given that

Outer diameter=12 cm

Thickness = 2.5 cm

So inner diameter = 7 cm

Outer wall temperature =100° C

Outer surface of insulation = 20 °C

As we know that thermal resistance of cylinder pipe is given as follows

Now by putting the values

Lets put l = 1 m because given that find heat loss per unit length

So

now heat loss Q

Q= 65.57 W

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