Question

In an industrial facility located in Doha, Qatar, two parallel hot and cold pipelines spaced 0.7 m
apart are buried in soil. The pipes have outer-diameters of 150 and 100 mm with surface
temperatures of 170°C and 5°C, respectively. It was found through measurements that the heat
transfer rate between the two pipelines is 135 Watt per meter length. It is believed that there is large
discrepancy between predicted and measured heat transfer rate.
What are the possible technical reasons for this discrepancy? From the possible technical reasons,
formulate a solution plan and describe the potential outcome of the solution(s).

Answer 1