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Alex787 [66]
3 years ago
10

Define the overall heat transfer coefficient.

Engineering
1 answer:
9966 [12]3 years ago
6 0

Answer and Explanation:

In thermodynamics, the overall heat transfer coefficient also referred as film effectiveness is a constant of proportionality between force drive for the heat flow and the heat flux.

It gives the measure of the heat transfer as a result of  convection or conduction. The coefficient of overall heat transfer depends on surface area, resistance of the material, temperature difference, thickness, etc.

It is given by:

Q = UA\Delta T

where

U = overall heat transfer coefficient

Its SI units is W/m^{2}K.

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Convection:

              In convection heat transfer of fluid takes place due to density difference .In simple words we can say that heat transfer occur due to motion of fluid.

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