iquid nitrogen is allowed to boil at temperature-182°C inside a tank. The tank is cylindrical in shape having hemispherical ends (1.5 m diameter and 7.5 m total length). The tank must be insulated to limit the rate of N2 boil-off not to exceed 16 g/hr. Calculate the thermal conductivity of the insulating material in W/m-K if its maximum thickness is limited to 70 mm. The atent heat of vaporization of liquid nitrogen is 200 kJ/kg and the temperature of the outside surface of insulation is equal to he room temperature of 22°C. Write your answer to four decimal places.
iquid nitrogen is allowed to boil at temperature-182°C inside a tank. The tank is cylindrical in shape having hemispherical ends (1.5 m diameter and 7.5 m total length). The tank must be insulated to limit the rate of N2 boil-off not to exceed 16 g/hr. Calculate the thermal conductivity of the insulating material in W/m-K if its maximum thickness is limited to 70 mm. The atent heat of vaporization of liquid nitrogen is 200 kJ/kg and the temperature of the outside surface of insulation is equal to he room temperature of 22°C. Write your answer to four decimal places.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter9: Heat Transfer With Phase Change
Section: Chapter Questions
Problem 9.7P
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