Vapor Mass Velocity of Tray Type Tower

on . Posted in Refinery Engineering

Vapor mass velocity in a tray-type tower is the mass of vapor that flows through a specific area cross-section of the tower per unit of time.

Key Points about Tray Towers

  • Vapor mass velocity is needed in determining the capacity and efficiency of the tray column.
  • It affects the tray efficiency, flooding point, and pressure drop.
  • Higher vapor mass velocities may lead to entrainment and flooding, while lower velocities may result in weeping or poor mass transfer.

 

Vapor Mass Velocity of Tray Type Tower Formula

\( w  \;=\;  3600 \; k_g \;  [\; ( \rho_l - \rho_g) \; \rho_g \;] ^{0.5}   \)
Symbol English Metric
\( w \) = Vapor Mass Velocity of Tray Type Tower \(lbm\;/\;ft^2-h\) -
\( k_g \) = Sizing Constant \(ft\;/\;sec\) -
\( \rho_l \) = Liquid Density \(lbm\;/\;ft^3\) -
\( \rho_g \) = Gas Density \(lbm\;/\;ft^3\) -

 

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Tags: Refinery