The formula for LMTD in a counterflow heat exchanger is given by:
\[ \text{LMTD} = \frac{\Delta T_1 - \Delta T_2}{\ln\left(\frac{\Delta T_1}{\Delta T_2}\right)} \]
where:
- \(\Delta T_1\) is the temperature difference at one end,
- \(\Delta T_2\) is the
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