A counter-flow heat exchanger is stated to have an overall heat transfer coefficient, based on outside tube area of 50 Btu/h·ft2·°F when operating at design and clean conditions. After a period of use, scale built-up in the heat exchanger gives a fouling factor of 0.002 h·ft2·°F/Btu. Determine (a) the overall heat transfer coefficient of the heat exchanger and (b) the percentage change in the overall heat transfer coefficient due to the scale built-up.
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.
A counter-flow heat exchanger is stated to have an
overall heat transfer coefficient, based on outside tube area of
50 Btu/h·ft2·°F when operating at design and clean conditions.
After a period of use, scale built-up in the heat exchanger
gives a fouling factor of 0.002 h·ft2·°F/Btu. Determine (a) the
overall heat transfer coefficient of the heat exchanger and
(b) the percentage change in the overall heat transfer coefficient
due to the scale built-up.
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