Distillation Tray Efficiency: tray_spacing
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 | system description | unit | value max | value min | value typical |
|---|---|---|---|---|---|---|---|
| tray_spacing | general_design | Normal design tray spacing; 450mm (18in) minimum for access; 600mm (24in) standard for most services; 750mm (30in) for foamy or high-liquid systems; 900mm (36in) for dirty/fouling service requiring manway access | Recommended tray spacing by service | mm | 900 | 450 | 600 |
| tray_spacing | high_pressure | Compressed spacing at high pressure possible because vapor density increases reducing entrainment; 300mm sometimes used above 10 bara | Tray spacing for elevated pressure service | mm | 600 | 300 | 450 |
| tray_spacing | vacuum_service | Wider spacing used in vacuum columns to reduce entrainment and allow larger active area; pressure drop per tray must be minimized | Tray spacing for vacuum distillation | mm | 900 | 600 | 750 |
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