A 30 cm outer diameter pipe with a surface temperature of 80 degree C carries st

Question

A 30 cm outer diameter pipe with a surface temperature of 80 degree C carries steam over a distance of 100m. The pipe is buried with its center line at a depth of 1 m, the ground surface is -6 degree C, and the mean thermal conductivity of the soil is 0.7 vv/m.K. Calculate the heat loss per day, and the cost, it steam is worth 3.00 TL per 106 kJ. Also, estimate the thickness of 85% magnesia insulation necessary to achieve the same insulation as provided by soil with a total heat transfer coefficient 23 W/m2K on the outside of the pipe.

Explanation / Answer

http://www.scribd.com/doc/68032239/Kreith-Principles-Heat-Transfer-7th-SI-Solman please check question 2.52

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