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Sigurd Skogestads 60th celebration day

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Presentation on theme: "Sigurd Skogestads 60th celebration day"— Presentation transcript:

1 Sigurd Skogestads 60th celebration day
NTNU, Trondheim

2 Vidar Alstad Title: Studies on selection of controlled variables
PhD student number 20 Years:

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

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

5 Control of granulation loops

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

7 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)

8

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