The inlet temperatures for a double-pipe heat exchanger contains water are 35 °C and 200 °C. If their flow rates are 84 kg/h (cold) and 42 kg/h (hot), then; a) Draw the schematic diagrams of counter flow and parallel flow operated for this heat exchanger. b) Evaluate the maximum rate of heat transfer. c) Evaluate the temperatures of water at the outlet of heat exchanger. If it is counterflow, the heat transfer area of heat exchanger and overall heat transfer coefficient are 0.33 m² and 180 W/m².K, respectively.

The inlet temperatures for a double-pipe heat exchanger contains water are 35 °C and 200 °C. If their flow rates are 84 kg/h (cold) and 42 kg/h (hot), then; a) Draw the schematic diagrams of counter flow and parallel flow operated for this heat exchanger. b) Evaluate the maximum rate of heat transfer. c) Evaluate the temperatures of water at the outlet of heat exchanger. If it is counterflow, the heat transfer area of heat exchanger and overall heat transfer coefficient are 0.33 m² and 180 W/m².K, respectively.

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

The inlet temperatures for a double-pipe heat exchanger contains water are 35 °C and 200 °C. If
their flow rates are 84 kg/h (cold) and 42 kg/h (hot), then;
a) Draw the schematic diagrams of counter flow and parallel flow operated for this heat
exchanger.
b) Evaluate the maximum rate of heat transfer.
c) Evaluate the temperatures of water at the outlet of heat exchanger. If it is counterflow, the
heat transfer area of heat exchanger and overall heat transfer coefficient are 0.33 m² and
180 W/m².K, respectively.
d) Determine the maximum rate of heat transfer for a parallel heat exchanger with same inlet
condition. Assume the heat exchanger is very long.
e) Find the effectiveness of the heat exchanger of part (c).

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