Thermal jackets are typically put on cryogenic storage tanks to minimize the heat transfer gains from the surroundings. Consider a cylinder container that is 1.5 m long made from steel (k = 750 W/m.K) with an inner diameter of 0.5 m and outer diameter of 0.7 m. If the liquefied natural gas (LNG) inside the cylinder is maintained at 90 K, ambient conditions are Tamb = 20 °C, h = 7 W/m2 .K.
Thermal jackets are typically put on cryogenic storage tanks to minimize the heat transfer gains from the surroundings. Consider a cylinder container that is 1.5 m long made from steel (k = 750 W/m.K) with an inner diameter of 0.5 m and outer diameter of 0.7 m. If the liquefied natural gas (LNG) inside the cylinder is maintained at 90 K, ambient conditions are Tamb = 20 °C, h = 7 W/m2 .K.
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.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.4P
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Thermal jackets are typically put on cryogenic
storage tanks to minimize the heat transfer gains
from the surroundings. Consider a cylinder
container that is 1.5 m long made from steel (k = 750
W/m.K) with an inner diameter of 0.5 m and outer
diameter of 0.7 m. If the liquefied natural gas (LNG)
inside the cylinder is maintained at 90 K, ambient
conditions are Tamb = 20 °C, h = 7 W/m2
.K.
What is the required insulation
material to maintain the outer temperature of that jacket of 15 °C? Use
the end of the book and write your assumption with the right value.
(Take a maximum allowed jacket thickness of Lins = 7 cm)
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