Heat Transfer by Conduction through a Cylindrical Wall
This calculation determines the heat transfer through a cylinder wall by conduction.
Heat Transfer by Conduction through a Cylindrical Wall formula 

\(\large{ Q_c = \frac { 2 \; \pi \; k \; l \; \left( T_1 \;\; T_2 \right) } { ln \; \left( \frac {r_2 }{ r_1 } \right) } }\)  
Symbol  English  Metric 
\(\large{ Q_c }\) = heat transfer by conduction  \(\large{\frac{Btu}{hr}}\)  \(\large{W}\) 
\(\large{ l }\) = length of material  \(\large{ft}\)  \(\large{m}\) 
\(\large{ r_1 }\) = radius inside diameter (ID)  \(\large{in}\)  \(\large{mm}\) 
\(\large{ r_2 }\) = radius outside diameter (OD)  \(\large{in}\)  \(\large{mm}\) 
\(\large{ T_1 }\) = temperature of one surface of the wall  \(\large{F}\)  \(\large{K}\) 
\(\large{ T_2 }\) = temperature of the other surface of the wall  \(\large{F}\)  \(\large{K}\) 
\(\large{ k }\) = thermal conductivity  \(\large{\frac{Btuft}{hrft^2F}}\)  \(\large{\frac{W}{mK}}\) 
Heat Transfer by Conduction through a Cylindrical Wall Calculator
