Sigurd Skogestads 60th celebration day

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PROCESS CONTROL GROUP Dept. of Chemical Engineering NTNU, Trondheim.

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Presentation transcript:

Sigurd Skogestads 60th celebration day NTNU, Trondheim 22-08-2015

Vidar Alstad Title: Studies on selection of controlled variables PhD student number 20 Years: 2000-2005

Work bio Vidar Alstad 2005-2007: Norsk Hydro ASA, Oil & Gas, Porsgrunn, Process control engineer Process control Slug control 2007-2011: Statoil ASA, R&D project manager, Porsgrunn Advanced wells Model predictive control 2011-2014: Yara International ASA, Porsgrunn, Process control engineer Control of granulation loops 2014-dd : Yara International ASA, Porsgrunn, R&D Project manager Process technology development

Private bio Vidar Alstad Married, Two kids Gaute (15) Grunde (10) Interests: Kayaking Telemark skiing

Control of granulation loops

Control of granulation loops Unsteady limit cycle behavior Complex chemistry and many disturbances Not seen as a process control problem

Process control actually can make a difference Amount of undersize, oversize and productsize Particles in recycle stream 140% 120% 100% Actual production And previous max production (red)