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186 Applied Process Design for Chemical and Petrochemical Plants
Figure 10-115. Design chart for correlating parameter X tt . (Used by permission: Fair, J. R. Petroleum Refiner, Feb. 1960, p. 105. ©Gulf Publish-
ing Company. All rights reserved.)
In the usual case, liquid and gas do not issue from
g. Length of increment, based on h v .
the reboiler with equal velocities.
h. Static pressure loss (Equation 10-172).
i. Frictional loss, Lockhart and Martinelli. 111 k. Total pressure loss.
3. Continue stepwise calculations to end of tubes. After
j. Acceleration loss: the acceleration loss term of
the pressure loss in exit piping is taken into account,
1 G T
P acc tp V tp dV tp 1V tp, out V L, in 2 (10-169) the residual pressure should equal the fixed pressure
below the bottom tray in the tower.
g c g c