# Heat Transfer Rate

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Heat transfer rate, abbreviated as $$Q_t$$, is the amount of hear transfered per unit of time per fluid or material.

## Heat Transfer Rate FormulA

 $$\large{ Q_t = k_t \; \frac { \Delta T}{l} }$$

### Where:

$$\large{ Q_t }$$ = heat transfer rate

$$\large{ l }$$ = length or distance

$$\large{ \Delta T }$$ = temperature differential

$$\large{ k_t }$$ = thermal conductivity constant