(c) i) Calculate the tube-side convective heat transfer coefficient (h) if the heat exchanger has 508 tubes of 20 mm outside diameter and thickness of 2mm; justify the selection of the proper equation, ii) give proper expressions for the Reynolds (Re) and Nusselt (Nu) numbers and explain their roles in the procedure of calculating convective heat transfer coefficients. (d) i) Calculate the total length of the heat exchanger tubes, if the overall heat transfer coefficient is 1070 W m²K-1, ii) explain the general concept of the overall heat transfer coefficient.

(c) i) Calculate the tube-side convective heat transfer coefficient (h) if the heat exchanger has 508 tubes of 20 mm outside diameter and thickness of 2mm; justify the selection of the proper equation, ii) give proper expressions for the Reynolds (Re) and Nusselt (Nu) numbers and explain their roles in the procedure of calculating convective heat transfer coefficients. (d) i) Calculate the total length of the heat exchanger tubes, if the overall heat transfer coefficient is 1070 W m²K-1, ii) explain the general concept of the overall heat transfer coefficient.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

Question

A shell-and-tube heat exchanger is used to cool compressed liquid methanol
from 176 °F to 104 °F. The methanol flows on the shell side of the
exchanger. The coolant is water that rises in temperature from 50 °F to
86 °F and flows within the tubes at a rate of 68.9 kg s-1. Finding the
appropriate thermophysical data and applying the proper equations, you are
required to do the following:

(c) i) Calculate the tube-side convective heat transfer coefficient (h) if the
heat exchanger has 508 tubes of 20 mm outside diameter and
thickness of 2mm; justify the selection of the proper equation, ii) give
proper expressions for the Reynolds (Re) and Nusselt (Nu) numbers
and explain their roles in the procedure of calculating convective heat
transfer coefficients.
(d)
i) Calculate the total length of the heat exchanger tubes, if the overall
heat transfer coefficient is 1070 W m²²K1, ii) explain the general
concept of the overall heat transfer coefficient.

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