Effectiveness Ntu: Crossflow both unmixed
0.50 1.0 to 0.75 1.0
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) |
|---|---|---|---|---|
| Crossflow both unmixed | 0.50 1.0 | 0.5 | 0.53 | 1 |
| Crossflow both unmixed | 0.50 1.5 | 0.5 | 0.66 | 1.5 |
| Crossflow both unmixed | 0.50 2.0 | 0.5 | 0.74 | 2 |
| Crossflow both unmixed | 0.50 2.5 | 0.5 | 0.8 | 2.5 |
| Crossflow both unmixed | 0.50 3.0 | 0.5 | 0.84 | 3 |
| Crossflow both unmixed | 0.50 4.0 | 0.5 | 0.9 | 4 |
| Crossflow both unmixed | 0.50 5.0 | 0.5 | 0.93 | 5 |
| Crossflow both unmixed | 0.75 0.0 | 0.75 | 0 | 0 |
| Crossflow both unmixed | 0.75 0.5 | 0.75 | 0.33 | 0.5 |
| Crossflow both unmixed | 0.75 1.0 | 0.75 | 0.5 | 1 |
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