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 s1. Finding the appropriate thermophysical data and applying the proper equations, you are required to do the following: (a) Calculate i) methanol mass flow rate in the exchanger, ii) methanol volumetric flowrate at the inlet of the exchanger. (b) i) For the counter-current flow of the fluids calculate the log mean temperature difference, ii) explain the purpose of calculating this difference iiil evplain quantitatively wby is the counter-current flow in

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 s1. Finding the appropriate thermophysical data and applying the proper equations, you are required to do the following: (a) Calculate i) methanol mass flow rate in the exchanger, ii) methanol volumetric flowrate at the inlet of the exchanger. (b) i) For the counter-current flow of the fluids calculate the log mean temperature difference, ii) explain the purpose of calculating this difference iiil evplain quantitatively wby is the counter-current flow in

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 s1. Finding the
appropriate thermophysical data and applying the proper equations, you are
required to do the following:
(a)
Calculate i) methanol mass flow rate in the exchanger, ii) methanol
volumetric flowrate at the inlet of the exchanger.
(b) i) For the counter-current flow of the fluids calculate the log
temperature difference, ii) explain the purpose of calculating this
difference, iii) explain, quantitatively, why is the counter-current flow in
heat exchangers preferred to co-current flow.
mean

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