Question

o Hot air at a temperature of 65°C is flowing through a
steel pipe of 120 mm diameter. The pipe is covered
with two layers of different insulating materials of
thickness 60 mm and 40 mm, and their corresponding
thermal conductivities are 0.24 and 0.4 W/m°C. The
inside and outside heat transfer coefficients are 60 and
12 W/m°C. The atmosphere is at 20°С. Find the rate of
heat loss from 60 m length of pipe.
Atmospheric alr
= 20°C​

Answer 1

Answer:

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Explanation:

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