2.4 kg/s of a fluid have a specific heat of 0.81 kJ/kg K enters a counter flow heat exchanger at 0°C and are heated to 400°C by 2 kg/s of a fluid having a specific heat of 0.96 kJ/kg K entering the unit at 700°C. What is the percentage increase in the heat transfer surface area if the cooled fluid is heated to 500°C (instead of 400°C), all other conditions remaining unchanged and assume also that the overall heat transfer coefficient U is unchanged). Draw the temperature length diagram for the heat exchanger.

2.4 kg/s of a fluid have a specific heat of 0.81 kJ/kg K enters a counter flow heat exchanger at 0°C and are heated to 400°C by 2 kg/s of a fluid having a specific heat of 0.96 kJ/kg K entering the unit at 700°C. What is the percentage increase in the heat transfer surface area if the cooled fluid is heated to 500°C (instead of 400°C), all other conditions remaining unchanged and assume also that the overall heat transfer coefficient U is unchanged). Draw the temperature length diagram for the heat exchanger.

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

2.4 kg/s of a fluid have a specific heat of 0.81 kJ/kg K enters a counter flow heat exchanger at 0°C
and are heated to 400°C by 2 kg/s of a fluid having a specific heat of 0.96 kJ/kg K entering the unit
at 700°C. What is the percentage increase in the heat transfer surface area if the cooled fluid is
heated to 500°C (instead of 400°C), all other conditions remaining unchanged and assume also that
the overall heat transfer coefficient U is unchanged). Draw the temperature length diagram for the
heat exchanger.

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