Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and

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Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150°C.

(a) If the flow rate and inlet temperature of the oil are 0.5 kg/s and 20°C, what is the outlet temperature

Tm,o? What is the total heat transfer rate q for the tube?

(b) For flow rates in the range 0.5 < m < 2.0 kg/s, compute and plot the variations of Tm,o and q with m. For what flow rate(s) are q and Tm,o maximized? Explain your results.

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Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

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Question Posted: Sep 30, 2010 06:23 AM

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Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and

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KNOWN Inlet temperature and flowrate of oil flowing through a tube of prescribed surface temperature and geometry FIND a Oil outlet temperature and to...View the full answer

Fundamentals of Heat and Mass Transfer

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