2-A cross-flow heat exchanger with both fluids unmixed is used to heat water (cp = 4.18 kJ/kg-K) from 40°C to 80°C, flowing at the rate of 1.0kg/s. What is the overall heat transfer coefficient %3D if hot engine oil (c, = 1.9 kJ/kg-K), flowing at the rate of 2.6 kg/s, enters at 100°C? The heat transfer area is 20 m². (Note that you can use either an effectiveness or an LMTD method. It would be wise to use both as a check.)
2-A cross-flow heat exchanger with both fluids unmixed is used to heat water (cp = 4.18 kJ/kg-K) from 40°C to 80°C, flowing at the rate of 1.0kg/s. What is the overall heat transfer coefficient %3D if hot engine oil (c, = 1.9 kJ/kg-K), flowing at the rate of 2.6 kg/s, enters at 100°C? The heat transfer area is 20 m². (Note that you can use either an effectiveness or an LMTD method. It would be wise to use both as a check.)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.45P
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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.
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Transcribed Image Text:2-A cross-flow heat exchanger with both fluids unmixed is used
to heat water (c, = 4.18 kJ/kg•K) from 40°C to 80°C, flowing at
the rate of 1.0kg/s. What is the overall heat transfer coefficient
if hot engine oil (c, = 1.9 kJ/kg-K), flowing at the rate of 2.6
kg/s, enters at 100°C? The heat transfer area is 20 m2. (Note
%3D
that you can use either an effectiveness or an LMTD method.
It would be wise to use both as a check.)
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