Calibration of a polyethylene plant for grade change optimisations
(2011) 21st European Symposium on Computer Aided Process Engineering, 2011 29. p.673-677- Abstract
- A polyethylene plant model coded in Modelica and based on a nonlinear MPC model currently used at Borealis AB is considered for calibration. A case study of model calibration at steady-state for four different operating points are analysed, both when looking at one operating point separately, but also to calibrate several simultaneously. Both model parameters and reactor inputs are calibrated for true plant measurement data. To solve the parameter estimation problem, the JModelica.org platform is used, offering tools to express and solve calibration problems. Calibration was obtained with narrow confidence intervals and shows a potential to improve the model accuracy by changing the parameter values. The results will be used for dynamic... (More)
- A polyethylene plant model coded in Modelica and based on a nonlinear MPC model currently used at Borealis AB is considered for calibration. A case study of model calibration at steady-state for four different operating points are analysed, both when looking at one operating point separately, but also to calibrate several simultaneously. Both model parameters and reactor inputs are calibrated for true plant measurement data. To solve the parameter estimation problem, the JModelica.org platform is used, offering tools to express and solve calibration problems. Calibration was obtained with narrow confidence intervals and shows a potential to improve the model accuracy by changing the parameter values. The results will be used for dynamic optimisations of grade changes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2158453
- author
- Andersson, Niklas LU ; Larsson, Per-Ola LU ; Åkesson, Johan LU ; Haugwitz, Staffan and Nilsson, Bernt LU
- organization
- publishing date
- 2011
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Calibration, Modelica, grade change, cheical industry, polymerisation
- host publication
- 21ST European Symposium on Computer Aided Process Engineering
- volume
- 29
- pages
- 673 - 677
- publisher
- Elsevier
- conference name
- 21st European Symposium on Computer Aided Process Engineering, 2011
- conference location
- Chalkidiki, Greece
- conference dates
- 2011-05-29 - 2011-06-01
- external identifiers
-
- wos:000294218900135
- ISSN
- 1570-7946
- ISBN
- 978-0-444-53895-6
- language
- English
- LU publication?
- yes
- additional info
- key=and+11escape project=polygradechange
- id
- c315b0d6-c86b-4b7b-9d92-563a4dc16d4f (old id 2158453)
- date added to LUP
- 2016-04-01 14:09:36
- date last changed
- 2019-12-11 09:36:14
@inproceedings{c315b0d6-c86b-4b7b-9d92-563a4dc16d4f, abstract = {{A polyethylene plant model coded in Modelica and based on a nonlinear MPC model currently used at Borealis AB is considered for calibration. A case study of model calibration at steady-state for four different operating points are analysed, both when looking at one operating point separately, but also to calibrate several simultaneously. Both model parameters and reactor inputs are calibrated for true plant measurement data. To solve the parameter estimation problem, the JModelica.org platform is used, offering tools to express and solve calibration problems. Calibration was obtained with narrow confidence intervals and shows a potential to improve the model accuracy by changing the parameter values. The results will be used for dynamic optimisations of grade changes.}}, author = {{Andersson, Niklas and Larsson, Per-Ola and Åkesson, Johan and Haugwitz, Staffan and Nilsson, Bernt}}, booktitle = {{21ST European Symposium on Computer Aided Process Engineering}}, isbn = {{978-0-444-53895-6}}, issn = {{1570-7946}}, keywords = {{Calibration; Modelica; grade change; cheical industry; polymerisation}}, language = {{eng}}, pages = {{673--677}}, publisher = {{Elsevier}}, title = {{Calibration of a polyethylene plant for grade change optimisations}}, url = {{https://lup.lub.lu.se/search/files/3820060/8084468.pdf}}, volume = {{29}}, year = {{2011}}, }