Thomas Lüder
Henkel
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Featured researches published by Thomas Lüder.
IFAC Proceedings Volumes | 1989
Thomas Lüder; Günter Wozny; G. Fieg; Lutz Jeromin
Abstract Two applications of mathematical process modeling to industrial scale distillation columns are discussed. In the first part the stripping section of a methanol-water separation column is described with the help of the location of a temperature front. A simple linear state space model is used to design an observer and state controller for the reboiler duty of the column. Its application is compared with experimental data obtained from an industrial distillation column with a PID-controller. In the second part an analytically reduced mathematical model for the estimation of the product composition in multicomponent distillation is presented. It is applied successfully to a fractionation plant consisting of three interlinked columns and is used for the purpose of diagnosis.
IFAC Proceedings Volumes | 1992
Thomas Lüder; Günter Wozny
Abstract The development of an appropriate low order dynamic process model of a distillation column is the most important prerequisite for the design of a successful control concept. In this paper we present a second order linear process model for a distillation column that can be treated fully analytically. It gives a steady- state exact representation of the column for any control configuration in the time as well as in the frequency domain and preserves the physical significance of all parameters. Because of the low computational effort and the consistency of the modelling information it is an effective tool for control structure analysis and controller design. A systematic comparison with related work of other authors reveals the analytical strength of our unified approach. A comparison to simulation results shows the very satisfactory reproduction of the column behaviour in the low to mid frequency range as well as the high frequency deficiencies of the model. These can be attributed to the fact that higher frequency effects such as level control and hydrodynamics have been neglected in its derivation in order to ensure its analytical tractability.
Archive | 1994
Volker Bauer; Jochen Jacobs; Bernhard Gutsche; Thomas Lüder; Christoph Breucker; Günter Panthel
Archive | 1996
Thomas Lüder; Konstantinos Scholinakis; Hermann Hensen; Werner Seipel; Mirella Rottmann
Archive | 1990
Lutz Jeromin; Günter Wozny; Thomas Lüder
Chemie Ingenieur Technik | 1990
Thomas Lüder; Günter Wozny; Lutz Jeromin
Archive | 1998
Thomas Lüder; Konstantinos Scholinakis; Bernhard Gutsche
Chemie Ingenieur Technik | 1992
Thomas Lüder; Günter Wozny; Lutz Jeromin
Archive | 1998
Bernhard Gutsche; Hermann Hensen; Thomas Lüder; Konstantinos Scholinakis; Werner Seipel
Archive | 1998
Bernhard Gutsche; Hermann Hensen; Thomas Lüder; Konstantinos Scholinakis; Werner Seipel