Heat Transfer Rate

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
\(\large{ Q_t = k_t \; \frac { \Delta T}{l} }\)
Symbol	English	Metric
\(\large{ Q_t }\) = heat transfer rate	\(\large{\frac{Btu}{hr}}\)	\(\large{W}\)
\(\large{ l }\) = length or distance	\(\large{ft}\)	\(\large{m}\)
\(\large{ \Delta T }\) = temperature differential	\(\large{F}\)	\(\large{K}\)
\(\large{ k_t }\) = thermal conductivity constant	\(\large{\frac{Btu-ft}{hr-ft^2-F}}\)	\(\large{\frac{W}{m-K}}\)