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Please calculate the heat transfer rate (Btu/hr) from a horizontal pipe flow of water at 120 F placed in ambient air at 70 F. The heat transfer coefficient from natural convection on the outside surface is 0.65 Btu/hr-ft²-F. The heat transfer coefficient from forced convection due to the internal turbulent flow is 399 Btu/hr-ft2-F. The pipe material is steel, and the outside diameter is 34 mm with a wall thickness of 2 mm. The pipe is 2 ft long.

Please calculate the heat transfer rate (Btu/hr) from a horizontal pipe flow of water at 120 F placed in ambient air at 70 F. The heat transfer coefficient from natural convection on the outside surface is 0.65 Btu/hr-ft²-F. The heat transfer coefficient from forced convection due to the internal turbulent flow is 399 Btu/hr-ft2-F. The pipe material is steel, and the outside diameter is 34 mm with a wall thickness of 2 mm. The pipe is 2 ft long.

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
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Heat transfer
Please calculate the heat transfer rate (Btu/hr) from a horizontal pipe flow of water at 120 F placed in ambient air at 70 F. The heat transfer coefficient from natural convection on the outside surface is 0.65 Btu/hr-ft2-F. The heat transfer coefficient from forced convection due to the internal turbulent flow is 399 Btu/hr-ft²-F. The pipe material is steel, and the outside diameter is 34 mm with a wall thickness of 2 mm. The pipe is 2 ft long.
Transcribed Image Text:Please calculate the heat transfer rate (Btu/hr) from a horizontal pipe flow of water at 120 F placed in ambient air at 70 F. The heat transfer coefficient from natural convection on the outside surface is 0.65 Btu/hr-ft2-F. The heat transfer coefficient from forced convection due to the internal turbulent flow is 399 Btu/hr-ft²-F. The pipe material is steel, and the outside diameter is 34 mm with a wall thickness of 2 mm. The pipe is 2 ft long.
Expert Solution
Step 1

Given

                   Temperature, T1 = 120oF

                                         T2 = 70oF

Heat transfer coefficient, h1 = 0.65 Btu/hr.ft2.F

                                        h2 = 399 Btu/hr.ft2.F

                             Length, L = 2 ft

                         Diameter, d = 34 mm

                         Thickness, t = 2 mm = 0.006 ft

Find

  Heat transfer rate, Q

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