A heat exchanger is being used to transfer heat between water and a 20% ethylene glycol solution. The ethylene glycol enters the heat exchanger at 150 gpm with a temperature of 20°F and exits at 40°F. The water enters the heat exchanger at 130 gpm at a temperature of 80°F. A heat transfer analysis reveals that the overall heat transfer coefficient of the heat exchanger is 400 Btu/h-ft2-°F. Determine the heat transfer area required for (a) a parallel-flow heat exchanger and (b) a counterflow heat exchanger.

A heat exchanger is being used to transfer heat between water and a 20% ethylene glycol solution. The ethylene glycol enters the heat exchanger at 150 gpm with a temperature of 20°F and exits at 40°F. The water enters the heat exchanger at 130 gpm at a temperature of 80°F. A heat transfer analysis reveals that the overall heat transfer coefficient of the heat exchanger is 400 Btu/h-ft2-°F. Determine the heat transfer area required for (a) a parallel-flow heat exchanger and (b) a counterflow heat exchanger.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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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

EXAMPLE 20
A heat exchanger is being used to transfer heat between water and a 20%
ethylene glycol solution. The ethylene glycol enters the heat exchanger at
150 gpm with a temperature of 20°F and exits at 40°F. The water enters the
heat exchanger at 130 gpm at a temperature of 80°F. A heat transfer analysis
reveals that the overall heat transfer coefficient of the heat exchanger is 400
Btu/h-ft2-°F. Determine the heat transfer area required for (a) a parallel-flow
heat exchanger and (b) a counterflow heat exchanger.
www.
www
www
www
mTho
T
Parallel-flow HX
T
Counterflow HX
Thi
Tho
Tho
tco
Heat exchanger area
A
Heat exchanger area
A

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