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A stainless steel (AISI 316) tube used to transport a chilled pharmaceutical has an inner diameter...

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Mechanical Engineering

A stainless steel (AISI 316) tube used to transport achilled pharmaceutical has an inner diameter of 30 mm and a wallthickness of 3 mm. The pharmaceutical and ambient air are attemperatures of 6oC and 23oC, respectively, while the correspondinginner and outer convection coefficients are 400 W/m2 K and 6 W/m2K, respectively.
(a) What is the heat gain per unit tube length?
(b) What is the heat gain per unit length if a 10-mm thick layer ofcalcium silicate insulation (k = 0.050 W/m. K) is applied to thetube?

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