# Heat Transfer

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Heat transfer, abbreviated as Q, also called thermal energy, is the exertion of power that is created by heat, or the increase in temperature.  It is the transfer of heat from one system to another.  There are four ways to transfer heat: conduction, convection, mixing, and radiation.

## Heat transfer formula

$$\large{ q = m \; c \; \Delta T }$$
Symbol English Metric
$$\large{ q }$$ = heat transfer $$\large{\frac{Btu}{hr}}$$ $$\large{W}$$
$$\large{ m }$$ = mass $$\large{lbm}$$ $$\large{kg}$$
$$\large{ c }$$ = specific heat $$\large{\frac{Btu}{lbm-F}}$$ $$\large{\frac{kJ}{kg-K}}$$
$$\large{ \Delta T }$$ = temperature change $$\large{ F }$$ $$\large{ K }$$