You are pumping liquid nitrogen at a temperature of -196°C through a long, thin-walled pipe; ignore the resistance of the pipe material and assume that the outside temperature of the pipe is the same as the liquid nitrogen. The pipe has an outside diameter of 12.0 cm; and is buried in the ground (k = 0.52 W/(m-k), ground surface temperature = 18.0°C) at a depth of 3.2 meters (distance from the surface of the ground to the centerline of the pipe). To reduce the heat loss from the pipe, it is insulated with a 5.0 cm layer of cryogenic insulation, k = 0.0017 W/(m-k). Draw a sketch of this problem; draw the resistor diagram, and assuming steady-state conditions calculate the heat gain per meter length of the pipe.
You are pumping liquid nitrogen at a temperature of -196°C through a long, thin-walled pipe; ignore the resistance of the pipe material and assume that the outside temperature of the pipe is the same as the liquid nitrogen. The pipe has an outside diameter of 12.0 cm; and is buried in the ground (k = 0.52 W/(m-k), ground surface temperature = 18.0°C) at a depth of 3.2 meters (distance from the surface of the ground to the centerline of the pipe). To reduce the heat loss from the pipe, it is insulated with a 5.0 cm layer of cryogenic insulation, k = 0.0017 W/(m-k). Draw a sketch of this problem; draw the resistor diagram, and assuming steady-state conditions calculate the heat gain per meter length of the pipe.
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter17: Energy In Thermal Processes: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 69P: An aluminum rod 0.500 m in length and with a cross-sectional area of 2.50 cm2 is inserted into a...
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You are pumping liquid nitrogen at a temperature of -196°C through a long, thin-walled pipe; ignore the resistance of the pipe material and assume that the outside temperature of the pipe is the same as the liquid nitrogen. The pipe has an outside diameter of 12.0 cm; and is buried in the ground (k = 0.52 W/(m-k), ground surface temperature = 18.0°C) at a depth of 3.2 meters (distance from the surface of the ground to the centerline of the pipe). To reduce the heat loss from the pipe, it is insulated with a 5.0 cm layer of cryogenic insulation, k = 0.0017 W/(m-k). Draw a sketch of this problem; draw the resistor diagram, and assuming steady-state conditions calculate the heat gain per meter length of the pipe.
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