Heat Transfer Coefficient

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Heat transfer coefficient, abbreviated as h, also called film coefficient or film effectiveness, is the convective heat transfer between a solid surface and the fluid around it.

 

Heat Transfer Coefficient formula

\(\large{ h = \frac { Q" }{\Delta T} }\) 

Where:

 Units English Metric
\(\large{ h }\) = heat transfer coefficient \(\large{\frac{Btu}{hr-ft^2-F}}\)  \(\large{\frac{W}{m^2-K}}\)
\(\large{ Q" }\) = heat flux \(\large{\frac{Btu}{hr-ft^2}}\)  \(\large{\frac{W}{m^2}}\)
\(\large{ \Delta T }\) = temperature differential between the solid surface and surrounding area \(\large{F}\) \(\large{K}\)

 

Related Heat Transfer Coefficient formula

\(\large{ h=\frac{ Nu \; k }{ l_c  }   }\)  (Nusselt number

Where:

\(\large{ h }\) = heat transfer coefficient

\(\large{ l_c }\) = characteristic length

\(\large{ Nu }\) = Nusselt number

\(\large{ k }\) = thermal conductivity

 

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Tags: Heat Transfer Equations Coefficient Equations Heat Equations