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In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with inner diameter of 20 mm and wall thickness of 0.07 m is used for carrying liquid oxygen to a storage tank. The liquid oxygen flowing in the pipe has an average temperature of -200°C and a convection heat transfer coefficient o 120 W/m2.K. The condition surrounding the pipe has an ambient air temperature of 20°C and a combined heat transfer coefficient of 20 W/m2. If the dew point is 10°C, determine the thickness of the insulation (k; = 0.05 W/m-K) around the copper pipe to avoid condensation on the outer surface Assume thermal contact resistance is negligible. Lig. O. -200°C

In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with inner diameter of 20 mm and wall thickness of 0.07 m is used for carrying liquid oxygen to a storage tank. The liquid oxygen flowing in the pipe has an average temperature of -200°C and a convection heat transfer coefficient o 120 W/m2.K. The condition surrounding the pipe has an ambient air temperature of 20°C and a combined heat transfer coefficient of 20 W/m2. If the dew point is 10°C, determine the thickness of the insulation (k; = 0.05 W/m-K) around the copper pipe to avoid condensation on the outer surface Assume thermal contact resistance is negligible. Lig. O. -200°C

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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In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with inner diameter of 20 mm and wall thickness of 0.07 m is used for carrying liquid oxygen to a storage tank. The liquid oxygen flowing in the pipe has an average temperature of -200°C and a convection heat transfer coefficient of 120 W/m2.K. The condition surrounding the pipe has an ambient air temperature of 20°C and a combined heat transfer coefficient of 20 W/m2.K. If the dew point is 10°C, determine the thickness of the insulation (k;= 0.05 W/m-K) around the copper pipe to avoid condensation on the outer surface. Assume thermal contact resistance is negligible. Liq. O2, –200°C h= 120 W/m²-K´ - Pipe, k̟ = 400 W/m-K Insulation k; = 0.05 W/m-K Surrounding air, 20°C heombined = 20 W/m² K Dew point = 10°C D2 D3 The thickness of the insulation is m.
Transcribed Image Text:In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with inner diameter of 20 mm and wall thickness of 0.07 m is used for carrying liquid oxygen to a storage tank. The liquid oxygen flowing in the pipe has an average temperature of -200°C and a convection heat transfer coefficient of 120 W/m2.K. The condition surrounding the pipe has an ambient air temperature of 20°C and a combined heat transfer coefficient of 20 W/m2.K. If the dew point is 10°C, determine the thickness of the insulation (k;= 0.05 W/m-K) around the copper pipe to avoid condensation on the outer surface. Assume thermal contact resistance is negligible. Liq. O2, –200°C h= 120 W/m²-K´ - Pipe, k̟ = 400 W/m-K Insulation k; = 0.05 W/m-K Surrounding air, 20°C heombined = 20 W/m² K Dew point = 10°C D2 D3 The thickness of the insulation is m.
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