A double-pipe heat exchanger (tubes are concentric with very thin walls) has a length of 5 m while their respective diameters are 3 cm and 6cm. In the outer pipe oil enters at 115C and leaves at 50 C while water flows in the inner tube where it enters at 20C and leaves at 70C. It is known that the overall heat transfer coefficient U for this counter-flow flow arrangement is 35 W/m2-K. What is the heat transfer for this heat exchangers? Select one: a. heat transfer = 713.8 W b. heat transfer = 645.8 W O C. heat transfer = 610.2 W O d. heat transfer = 680.3 W e. heat transfer = 628.7 W

A double-pipe heat exchanger (tubes are concentric with very thin walls) has a length of 5 m while their respective diameters are 3 cm and 6cm. In the outer pipe oil enters at 115C and leaves at 50 C while water flows in the inner tube where it enters at 20C and leaves at 70C. It is known that the overall heat transfer coefficient U for this counter-flow flow arrangement is 35 W/m2-K. What is the heat transfer for this heat exchangers? Select one: a. heat transfer = 713.8 W b. heat transfer = 645.8 W O C. heat transfer = 610.2 W O d. heat transfer = 680.3 W e. heat transfer = 628.7 W

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 7.46P

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