In: Mechanical Engineering
A stainless steel (AISI 316) tube used to transport a
chilled pharmaceutical has an inner diameter of 30 mm and a wall
thickness of 3 mm. The pharmaceutical and ambient air are at
temperatures of 6oC and 23oC, respectively, while the corresponding
inner and outer convection coefficients are 400 W/m2 K and 6 W/m2
K, 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 of
calcium silicate insulation (k = 0.050 W/m. K) is applied to the
tube?