Operating charts for continuous sedimentation III: control of step inputs
Författare
Summary, in English
The main purposes of a clarifier-thickener unit is that it should produce a high underflow concentration and a zero effluent concentration. The main difficulty in the control of the clarification-thickening process (by adjusting a volume flow) is that it is nonlinear with complex relations between concentrations and volume flows via the solution of a PDE - a conservation law with a source term and a space-discontinuous flux function. In order to approach this problem, control objectives for dynamic operation and strategies on how to meet these objectives are presented in the case when the clarifier-thickener unit initially is in steady state in optimal operation and is subjected to step input data. A complete classification of such solutions is given by means of an operating chart (concentration-flux diagram).
Avdelning/ar
- Matematik LTH
- Partial differential equations
Publiceringsår
2006
Språk
Engelska
Sidor
225-259
Publikation/Tidskrift/Serie
Journal of Engineering Mathematics
Volym
54
Issue
3
Dokumenttyp
Artikel i tidskrift
Förlag
Springer
Ämne
- Control Engineering
- Mathematics
- Chemical Engineering
- Water Engineering
- Water Treatment
Nyckelord
- thickener
- control
- operating charts
- continuous sedimentation
- step response
Status
Published
Forskningsgrupp
- Partial differential equations
ISBN/ISSN/Övrigt
- ISSN: 0022-0833