Answer to Question #181930 in Physics for Knight

Question

The walls of a refrigeration plant are composed of an insulating material (k=0.256

Kj per hour –m-C) 15 cm thick held between two layers of hollow blocks

(k=4.2KJ/hr – m-C) each 15cm thick. The film coefficients are 90KJ/hr-m-C on

the outside and 45 KJ/hr-m-C on the inside. Cold storage temperature is -10C and

the ambient temperature is 30C. Determine the overall coefficient of heat transfer.

Answer 1

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