Q/ A composite wall is formed of a 2.5-cm copper plate (k = 386 W/m.°C), a 3.2-mm layer of 0.038 W/m.°C). The wall is asbestos (k = 0.16 W/m.°C), and a 5-cm layer of fiberglass (k subjected to an overall temperature difference of 560-C. Calculate the heat flow per unit area 1. Water flows at the rate of 0.5 kg/s in a 2.5-cm-diameter tube having a length of 3 m.A constant heat flux is imposed at the tube wall so that the tube wall temperature is40•C higher than the water temperature. Calculate the heat transfer and estimate thetemperature rise in the water. The water is pressurized so that boiling cannot occur.

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A composite wall is formed of a 2.5-cm copper plate (k = 386 W/m.°C), a 3.2-mm layer of 0.038 W/m.°C). The wall is asbestos (k = 0.16 W/m.°C), and a 5-cm layer of fiberglass (k subjected to an overall temperature difference of 560-C. Calculate the heat flow per unit area

A composite wall is formed of a 2.5-cm copper plate (k = 386 W/m.°C), a 3.2-mm layer of 0.038 W/m.°C). The wall is asbestos (k = 0.16 W/m.°C), and a 5-cm layer of fiberglass (k subjected to an overall temperature difference of 560-C. Calculate the heat flow per unit area

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.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.15P

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Question

Q/ A composite wall is formed of a 2.5-cm copper plate (k = 386 W/m.°C), a 3.2-mm layer of 0.038 W/m.°C). The wall is asbestos (k = 0.16 W/m.°C), and a 5-cm layer of fiberglass (k subjected to an overall temperature difference of 560-C. Calculate the heat flow per unit area

1. Water flows at the rate of 0.5 kg/s in a 2.5-cm-diameter tube having a length of 3 m.
A constant heat flux is imposed at the tube wall so that the tube wall temperature is
40•C higher than the water temperature. Calculate the heat transfer and estimate the
temperature rise in the water. The water is pressurized so that boiling cannot occur.

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