# Total Heat Transfer

on . Posted in Thermodynamics

Total heat transfer, abbreviated as Q, is the heat put into a system or heat lost from a system.

## Total Heat Transfer Formula

$$\large{ Q = h \; A \; \left( T_s \;-\; T_{\infty} \right) }$$
Symbol English Metric
$$\large{ Q }$$ = total heat transfer $$\large{\frac{Btu}{hr}}$$ $$\large{W}$$
$$\large{ A }$$ = surface area where heat is transfered $$\large{ft^2}$$ $$\large{m^2}$$
$$\large{ h }$$ = heat transfer coefficient $$\large{\frac{Btu}{hr-ft^2-F}}$$ $$\large{\frac{W}{m^2-K}}$$
$$\large{ T_s }$$ = surface temperature $$\large{F}$$ $$\large{K}$$
$$\large{ T_{\infty} }$$ = approach fluid temperature $$\large{F}$$ $$\large{K}$$