Distillation Tray Efficiency: pressure_drop
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 |
|---|---|---|---|---|---|---|---|
| pressure_drop | bubble_cap_total | Total bubble-cap tray pressure drop; highest of all tray types due to liquid seal height and slot submergence; 2-3x sieve tray DP at equivalent conditions | bubble_cap | mm_H2O | 200 | 60 | 100 |
| pressure_drop | sieve_dry_tray | Dry tray pressure drop component = 51*(rho_V/rho_L)*(uh/Co)^2 mm liquid; uh=hole velocity m/s; Co=orifice coefficient 0.73-0.77 for sharp-edge holes; increases steeply with hole velocity | sieve | mm_H2O | 80 | 10 | 25 |
| pressure_drop | sieve_liquid_head | Liquid-head pressure drop component = hw + how; hw=weir height (typically 25-50mm); how=crest over weir from Francis weir formula; sets lower limit of liquid on tray | sieve | mm_H2O | 40 | 10 | 20 |
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