Effectiveness Ntu: Counterflow
Heat exchanger effectiveness (ε) vs. number of transfer units (NTU) and capacity ratio (Cr = Cmin/Cmax) for seven flow configurations: parallel-flow, counterflow, shell-and-tube 1-pass, shell-and-tube 2-pass, crossflow both unmixed, crossflow Cmin mixed, crossflow Cmax mixed. Data digitized from Incropera Figures 11.10-11.15.
| hx configuration | sk | capacity ratio (dimensionless) | effectiveness (dimensionless) | ntu (dimensionless) |
|---|---|---|---|---|
| Counterflow | 0.00_0.0 | 0 | 0 | 0 |
| Counterflow | 0.00_0.5 | 0 | 0.39 | 0.5 |
| Counterflow | 0.00_1.0 | 0 | 0.63 | 1 |
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