Question: Example 4 . 3 : A 5 0 m m i . d . iron pipe at 4 2 3 K ( 1 5 0

Example 4.3 : A 50mm i.d. iron pipe at 423K(150C) passes through a room in which the surroundings are at 300K(27C). If the emissivity of the pipe metal is 0.8, what is the net interchange of radiation energy per meter length of pipe? The outside diameter of pipe is 60mm.
Solution :
Jength of nine =1m
Example 4.3 : A 50mm i.d. iron pipe at 423K(150C) passes

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