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What is the unit of heat transfer coefficient?(a) Watt m^2 / k(b) Watt m^2 k(c) Watt / m^2 k(d) Watt / m^2k^2I had been asked this question during an interview.My question is based upon External Mass Transfer in portion Heterogenous Reactions of Bioprocess Engineering

Answer»

The CORRECT option is (c) Watt / m^2 k

Explanation: Heat flux form a bulk fluid at T∞ to the surface of a SPHERICAL particle of diameter dp at TS: Newtons law of COOLING:

q = h (T∞ – TS)

Where, q (Heat flux) = Watt / m^2

h (Heat transfer coefficient) = Watt / m^2K.



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