Distillation Tray Efficiency: turndown_ratio
Distillation tray efficiency data: O'Connell overall column efficiency vs alpha*mu (14 data points, formula Eo=50.3*(alpha*mu)^-0.226), Murphree tray efficiency ranges by tray type and system, weep-point velocities, Fair flooding C-factors (Csb) at multiple tray spacings, downcomer backup limits, tray pressure drop components, turndown ratios, and tray spacing recommendations
| parameter type | record id | notes | tray type | unit | value max | value min | value typical |
|---|---|---|---|---|---|---|---|
| turndown_ratio | bubble_cap | Turndown ratio for bubble-cap trays; liquid seals prevent any weeping; highest turndown and most stable operation | bubble_cap | dimensionless | 8 | 5 | 6 |
| turndown_ratio | dual_flow | Turndown ratio for dual-flow trays; narrowest operating window; no downcomer limits liquid handling | dual_flow | dimensionless | 2.5 | 1.5 | 2 |
| turndown_ratio | sieve_tray | Turndown ratio (max/min throughput at acceptable efficiency) for sieve trays; limited by weeping at low vapor rates; larger holes reduce turndown | sieve | dimensionless | 3 | 2 | 2.5 |
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