Heat-Storage Effect on Column Pressure

The stored heat in the liquid in the column and its base can exercise quite a leveling effect on pressure and differential pressure. If pressure starts to chop, more liquid flashes, which tends to reduce the rate at which pressure falls. If pressure starts to rise, the reverse happens—the rate of boiling is decreased and pressure rises at a slower rate. In diis section we will see how vaporization rate, w, is affected by heat storage. [Pg.405]

Column AP is small compared with absolute pressure. [Pg.405]

Latent heats at the top and bottom of the column are nearly the same. [Pg.405]

We may now write a heat-balance equation similar to equation (15.30) but with terms for reflux added [Pg.406]

Reboiler with Steam Flow or Flow-Ratio Controlled [Pg.406]

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