N1 fata Pe

Pg e where:



and Pe is the Peclet number, defined as Pe = Z2/DEij. Here Zl is the length of liquid travel, or the distance between the two weirs and tl is the liquid residence time. The effective diffusivity is given by:

where DE is in square feet per second, uG is superficial gas velocity, expressed as cubic feet per second divided by the active bubbling area in square feet. As the Peclet number becomes large, this model predicts efficiency enhancement much large than unity. In large diameter columns (large Zl) the Peclet number can tend to take a large value which would suggest significant efficiency enhancements. But it should be remembered that the above model considers only the longitudinal mixing process. In large diameter columns, the liquid flow structure can be much more complicated as documented by Solari and Bell (1986). Hence, predicted values of EMV/EOG greater than 1.2 by the longitudinal mixing model should be viewed with caution, as they may not be realized in the field.

Effect of Entrainment on Murphree Tray Efficiency

The effect of entrainment on the Murphree tray efficiency is estimated from:


Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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