A cylindrical liquid nitrogen tank of 25 cm inside diameter, 5 mm thickness and l m height having inside surface temperature of -196oC (same liquid nitrogen temperature). The tank is covered with 2.5 cm layer of insulation having k = 0.2 mW/m.oC. The outer surface temperature of insulation is 20oC and the ambient temperature is 25oC. The required energy to vaporize one kilogram mass of nitrogen at -196oC is 199 kJ. The thermal conductivity of the tank material is 0.025 W/m.oC. Calculate (1) The amount of nitrogen that vaporized per hour. (2) The temperature of the entire insulation surface. (3) Convection heat transfer coefficient
A cylindrical liquid nitrogen tank of 25 cm inside diameter, 5 mm thickness and l m height having inside surface temperature of -196oC (same liquid nitrogen temperature). The tank is covered with 2.5 cm layer of insulation having k = 0.2 mW/m.oC. The outer surface temperature of insulation is 20oC and the ambient temperature is 25oC. The required energy to vaporize one kilogram mass of nitrogen at -196oC is 199 kJ. The thermal conductivity of the tank material is 0.025 W/m.oC. Calculate (1) The amount of nitrogen that vaporized per hour. (2) The temperature of the entire insulation surface. (3) Convection heat transfer coefficient
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A cylindrical liquid nitrogen tank of 25 cm inside diameter, 5 mm thickness and l m height having inside surface temperature of -196oC (same liquid nitrogen temperature). The tank is covered with 2.5 cm layer of insulation having k = 0.2 mW/m.oC. The outer surface temperature of insulation is 20oC and the ambient temperature is 25oC. The required energy to vaporize one kilogram mass of nitrogen at -196oC is 199 kJ. The thermal conductivity of the tank material is 0.025 W/m.oC. Calculate
(1) The amount of nitrogen that vaporized per hour.
(2) The temperature of the entire insulation surface.
(3) Convection heat transfer coefficient
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