December 2002
Intermediate to advanced
800 pages
18h 7m
English
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M13.4. RGA Analysis
The RGA (Chapter 13) for this system is
This RGA indicates that the xD-L (distillate composition-reflux flow) and xB-V (bottoms composition-reboiler vapor flow) input-output pairings are the only possible pairings, since pairing on a negative relative gain would lead to a failure-sensitive system. It also indicates that this system is sensitive to model uncertainty and that significant tuning parameter changes must be made (typically, the magnitude of the proportional gains must be increased) so that both loops can be closed simultaneously with good performance. Very often, with high relative gain systems, tuning parameters ...
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