Plate efficiency AIChE method

The AIChE method is the most detailed method for predicting plate efficiencies that is available in the open literature. It takes into account all the major factors that are known to affect plate efficiency this includes ... 

Chan and Fair (1984a) have published an alternative method for point efficiencies on sieve plates which they demonstrate gives closer predictions than the AIChE method. 

The relation between the plate efficiency and point efficiency with the Peclet number as a parameter is shown in Figure 11.16a and b. The application of the AIChE method is illustrated in Example 11.12. 

The AIChE method, and that of Van Winkle, predict the dry Murphree plate efficiency. In operation some liquid droplets will be entrained and carried up the column by the vapour flow, and this will reduce the actual, operating, efficiency. 

For the plate design in Example 11.11, estimate the plate efficiency for the plate on which the concentration of acetone is 5 mol per cent. Use the AIChE method. 

This expression corresponds essentially to the limit of Pet —> 00 shown in Figure 8.3.6. A comprehensive background on stage efficiency for a plate in a distillation column, its relation to point efficiency, as well as a brief description of the AIChE tray-efHciency prediction method" has been provided by King (1980, pp. 621-622). 

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See also in sourсe #XX -- [ ]

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