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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.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Liquid 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 N, boil-off not to exceed 16 kg/hr. Calculate the thermal conductivity of the insulating material in W/m-K if its maximum thickness is limited to 70 mm. The latent heat of vaporization of liquid nitrogen is 200 kJ/kg and the temperature of the outside surface of insulation is equal to the room temperature of 22°C. Write your answer to four decimal places.
Transcribed Image Text:Liquid 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 N, boil-off not to exceed 16 kg/hr. Calculate the thermal conductivity of the insulating material in W/m-K if its maximum thickness is limited to 70 mm. The latent heat of vaporization of liquid nitrogen is 200 kJ/kg and the temperature of the outside surface of insulation is equal to the room temperature of 22°C. Write your answer to four decimal places.
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