Effectiveness Ntu: Parallel-flow
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) |
|---|---|---|---|---|
| Parallel-flow | 0.50 1.0 | 0.5 | 0.48 | 1 |
| Parallel-flow | 0.50 1.5 | 0.5 | 0.57 | 1.5 |
| Parallel-flow | 0.50 2.0 | 0.5 | 0.61 | 2 |
| Parallel-flow | 0.50 2.5 | 0.5 | 0.64 | 2.5 |
| Parallel-flow | 0.50 3.0 | 0.5 | 0.65 | 3 |
| Parallel-flow | 0.50 4.0 | 0.5 | 0.66 | 4 |
| Parallel-flow | 0.50 5.0 | 0.5 | 0.67 | 5 |
| Parallel-flow | 0.75 0.0 | 0.75 | 0 | 0 |
| Parallel-flow | 0.75 0.5 | 0.75 | 0.28 | 0.5 |
| Parallel-flow | 0.75 1.0 | 0.75 | 0.42 | 1 |
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