Question #1 Calculate the heat losses from an insulated steel pipe (k = 50 W/m K) with an internal diameter of 6 cm, an external diameter of 8 cm, and a length of 20m. Saturated steam flows inside the pipe at 200°C (hci = 800 W/m² K). The pipe is located in a space at 10°C, and the heat transfer coefficient on its outer surface is estimated to be hco-200 W/m² K. The insulation available to reduce heat losses is 4 cm thick gypsum plaster with thermal conductivity of 0.20 W/m K. Also, calculate the temperature on the outside surface of the insulation.

Question #1 Calculate the heat losses from an insulated steel pipe (k = 50 W/m K) with an internal diameter of 6 cm, an external diameter of 8 cm, and a length of 20m. Saturated steam flows inside the pipe at 200°C (hci = 800 W/m² K). The pipe is located in a space at 10°C, and the heat transfer coefficient on its outer surface is estimated to be hco-200 W/m² K. The insulation available to reduce heat losses is 4 cm thick gypsum plaster with thermal conductivity of 0.20 W/m K. Also, calculate the temperature on the outside surface of the insulation.

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 7.17P: Determine the rate of heat transfer per meter length to a light oil flowing through a 2.5-cm-ID,...

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