1. 1 Plantwide control Control structure design for complete chemical plants Sigurd Skogestad Department of Chemical Engineering Norwegian University of Science and Tecnology (NTNU) Trondheim, Norway Thailand August 2005

2. 2 Trondheim, Norway

3. 3 Trondheim Oslo UK NORWAY DENMARK GERMANY

4. 4 NTNU, Trondheim Process Control professors: –Bjarne Foss –Morten Hovd –Jens Balchen –Heinz Preisig –Sigurd Skogestad EE ChE

5. 5 Sigurd Skogestad Born in 1955 1978: Siv.ing. Degree (MS) in Chemical Engineering from NTNU (NTH) 1980-83: Process modeling group at the Norsk Hydro Research Center in Porsgrunn 1983-87: Ph.D. student in Chemical Engineering at Caltech, Pasadena, USA. Thesis on “Robust distillation control”. Supervisor: Manfred Morari 1987 - : Professor in Chemical Engineering at NTNU Since 1994: Head of process systems engineering center in Trondheim (PROST) Since 1999: Head of Department of Chemical Engineering 1996, 2005: Book “Multivariable feedback control” (Wiley) 2000, 2003: Book “Prosessteknikk” (Tapir) Group of about 10 Ph.D. students in the process control area

6. 6 Research: Develop simple yet rigorous methods to solve problems of engineering significance. Use of feedback as a tool to 1. reduce uncertainty (including robust control), 2.change the system dynamics (including stabilization; anti-slug control), 3.generally make the system more well-behaved (including self- optimizing control). limitations on performance in linear systems (“controllability”), control structure design and plantwide control, interactions between process design and control, distillation column design, control and dynamics. Natural gas processes