Question 5

In a polymeric pipe (50 W/m/K of

thermal conductivity) 14 m long, the

temperature measured at the outermost

radius is 19°C. The temperature at the

innermost pipe surface is 69°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