Answer / v.vijay reddy

The overall heat transfer coefficient U is a measure of the
overall ability of a series of conductive and convective
barriers to transfer heat. It is commonly applied to the
calculation of heat transfer in heat exchangers, but can be
applied equally well to other problems.

Answer / dhaval

It is the measure of total amount of heat transferd by
means of conduction or convection through heat transfer
barriers.

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