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  4. Influence of heat transfer across the wall of dividing wall columns on energy demand
 
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Influence of heat transfer across the wall of dividing wall columns on energy demand

Publikationstyp
Journal Article
Date Issued
2015-05-01
Sprache
English
Author(s)
Ehlers, Christoph  
Schröder, Moritz  
Fieg, Georg  
Institut
Prozess- und Anlagentechnik V-4  
TORE-URI
http://hdl.handle.net/11420/7336
Journal
AIChE journal  
Volume
61
Issue
5
Start Page
1648
End Page
1662
Citation
AIChE Journal 5 (61): 1648-1662 (2015-05-01)
Publisher DOI
10.1002/aic.14747
Scopus ID
2-s2.0-84928276433
The implementation of a vertical dividing wall (DW) into a distillation column is a well-known concept which can result in considerable energy savings for the separation of multicomponent mixtures. It is commonly known that heat streams across the DW, which are present due to temperature differences between both sides, may either increase or decrease the energy demand for a certain separation task. However, no work has been published so far which explains the maximum influence on energy demand. This article derives the maximum extent to which the minimum energy demand for a given column design can change due to heat transfer across the DW. Additionally, it is illustrated how energy-efficient column operation can be assured even if the total amount of transferred heat is unknown. These results show that the phenomenon of heat transfer across the DW can be handled very well with a suitable control strategy.
Subjects
Distillation
Heat transfer
Mathematical modeling
Process control
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