Steam passes through a steel pipe with an inner diameter of 60 mm and an outer diameter of 75 mm at 250 ° C. The heat transfer coefficients inside and outside the pipe are respectively 500 and 25 W / m2K. If the ambient temperature is 20°C and the heat transfer coefficient of the pipe is 56.5 W/mK A)Find the heat loss from the 5 m length of the pipe. B) What thickness of insulation should be made from the material with a heat transfer coefficient of 0.035 W / mK in order to reduce the heat loss by 95%.

Steam passes through a steel pipe with an inner diameter of 60 mm and an outer diameter of 75 mm at 250 ° C. The heat transfer coefficients inside and outside the pipe are respectively 500 and 25 W / m2K. If the ambient temperature is 20°C and the heat transfer coefficient of the pipe is 56.5 W/mK A)Find the heat loss from the 5 m length of the pipe. B) What thickness of insulation should be made from the material with a heat transfer coefficient of 0.035 W / mK in order to reduce the heat loss by 95%.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter7: Tubing And Piping

Section: Chapter Questions

Problem 1RQ: The standard weight of copper tubing used most frequently in the heating and air-conditioning...

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