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Question 5

In a polymeric pipe (50 W/m/K of thermal conductivity) 13 m long, the temperature

measured at the outermost radius is 11°C. The temperature at the innermost pipe

surface is 57°C and the heat flux at outermost surface is one quarter of the heat flux at

innermost surface of the pipe. Evaluate the whole heat transfer (absolute value) through

the pipe thickness to the nearest kW.

Note: use pi=3.1415