Heat and Mass Transfer
Sensible heat is the heat required to

Convert water into steam and superheat it
Change vapour into liquid
Increase the temperature of a liquid of vapour
Change liquid into vapour

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Heat and Mass Transfer
Film coefficient is defined as Inside diameter of tube

Film coefficient × Inside diameter Thermal conductivity
Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
Equivalent thickness of film
Thermal conductivity Equivalent thickness of film Specific heat × Viscosity

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