In ASPEN, the reflux ratio is sometimes used as a positive value and sometimes as a negative value – what is the difference?
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I’m a beginner. Some studies have shown that in the simplified design of towers, the reflux ratio can take either positive or negative values, such as -2.1. What is the difference between positive and negative values?
-n: Indicates that the reflux ratio R is n times the minimum reflux ratio Rin. (+)n: Indicates that the reflux ratio is n
There are corresponding English explanations below ASPEN; you can take a look. The English explanations aren’t very difficult
A negative value indicates the ratio of the reflux ratio to the minimum reflux ratio； The positive value represents the reflux ratio.
As mentioned above, a negative value indicates the ratio of the reflux ratio to the minimum reflux ratio； The positive value represents the actual reflux ratio. In simplified design, when determining the number of theoretical plates, the reflux ratio is usually set at -1.2, indicating that the actual reflux ratio is 1.2 times the minimum reflux ratio; this is a commonly used approach