52 - Heat Exchangers - Effectiveness-NTU Method
Completion requirements
5. Effectiveness - NTU Method for Countercurrent Exchanger
Similar derivation can be done for countercurrent exchanger. However, the algebraic reduction is more involved. The final relation is given as \[\boxed{\varepsilon = \frac{1-\exp[-N(1-C)]}{1-C\exp[-N(1-C)]}}\]