Logarithmic Mean Temperature Differential

Written by Jerry Ratzlaff on . Posted in Thermodynamics

formula

\(LMTD = \frac {T_1\;-\;T_2} {ln \frac{T_1}{T_2}} \; = \; \frac {T_1\;-\;T_2} {lnT_1\;-\;lnT_2} \)

Where:

\( LMTD \) = logarithmic mean temperature differential

\( T_1 \) = the inlet temperature differences between the hot and cold fluids

\( T_2\) = the outlet temperature differences between the hot and cold fluids

\( ln\) = natural logarithm (e = 2.71828)