For a heat exchanger with flat heat transfer surface the overall heat transfer coefficient based on:
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The heat transfer coefficient or film coefficient, or film effectiveness, in thermodynamics and in mechanics is the proportionality constant between the heat flux and the thermodynamic driving force for the flow of heat (i.e., the temperature difference, ΔT):
The overall heat transfer rate for combined modes is usually expressed in terms of an overall conductance or heat transfer coefficient, U. In that case, the heat transfer rate is:
Q=hA(T2-T1)
where
A= surface area where the heat transfer take ace msquare
T2: temperature of sorroundingfluid
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if not then comment me
The overall heat transfer rate for combined modes is usually expressed in terms of an overall conductance or heat transfer coefficient, U. In that case, the heat transfer rate is:
Q=hA(T2-T1)
where
A= surface area where the heat transfer take ace msquare
T2: temperature of sorroundingfluid
I hope this will help you
if not then comment me
Answered by
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The overall heat transfer coefficient, or U-value, refers to how well heat is conducted through over a series of resistant mediums. Its units are the W/(m²°C) [Btu/(hr-ft²°F)].
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