Distillation Tray Efficiency: downcomer_backup
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 |
|---|---|---|---|---|---|---|---|
| downcomer_backup | sieve_standard | Maximum downcomer backup as percentage of tray spacing; limit is 50% to prevent flooding; 40-45% design target leaves turndown margin; backup = sum(dry tray pressure drop + liquid head equivalent + downcomer head loss) | sieve | pct_tray_spacing | 50 | 35 | 45 |
| downcomer_backup | valve_standard | Downcomer backup limit for valve trays; same 50% rule; valve trays often need slightly more downcomer area due to higher liquid loads at high capacity | valve | pct_tray_spacing | 50 | 35 | 45 |
This is a sample. Search the full distillation tray efficiency dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE