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Stojanovski G.,TU Dortmund | Maxeiner L.,TU Dortmund | Kramer S.,INEOS Cologne GmbH | Engell S.,TU Dortmund
2015 European Control Conference, ECC 2015 | Year: 2015

The efficient real-time plant-wide coordination of petrochemical production sites is a challenging and yet not fully resolved problem and its solution can substantially improve the productivity and the efficiency of such complex petrochemical plants. While a site-wide integrated optimization might be feasible in principle, the size of the problem, the unavailability of data and the management structures of the plants favour a distributed solution, where the global coordination has to be achieved by suitable mechanisms. In this paper we propose price based coordination in a moving horizon setting to achieve plant-wide real-time coordination of the utilization of shared resources without communication of detailed knowledge of the structure of the subsystems. The shared resources are considered as market commodities that are traded between the units and global coordination is achieved by real-time adjustment of their market prices. We provide results of different price coordination methods for a model of an integrated petrochemical site. The results clearly show that market mechanisms can be applied for the coordination of large sites in the petrochemical industry. © 2015 EUCA. Source


Minnich C.,S PACT GmbH | Hardy S.,S PACT GmbH | Hardy S.,BASF | Kramer S.,INEOS Cologne GmbH
Chemie-Ingenieur-Technik | Year: 2016

The different use of the classifiers inline, online, atline, and offline in the process analytical technology (PAT) and automation communities regularly induces unambiguity in communication. Therefore, the available definitions of the classifiers are summarized and merged. An updated nomenclature targeting the intended function of the analyzer rather than its features is suggested. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Roth T.,TU Dortmund | Hoffmann A.,TU Dortmund | Kreis P.,TU Dortmund | Lauterbach S.,INEOS Cologne GmbH
Chemie-Ingenieur-Technik | Year: 2011

The combination between reaction and pervaporation has been investigated using the example of a heterogeneous catalysed esterification reaction. The process model parameters have been determined based on experimental investigations and a scale-up has been performed to the pilot scale. A detailed process analysis leads to optimal operating as well as structural variables and two separation sequences have been suggested. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Kramer S.,INEOS Cologne GmbH | Dunnebier G.,Bayer AG | Kahrs O.,BASF | Luft H.,Evonik Industries
Chemie-Ingenieur-Technik | Year: 2011

Continuous processes show dynamics during load changes, start-up and shutdowns whereas batch processes exhibit inherent dynamics. In the past, the major concern of automating these dynamics states of process operation were safe and reproducible operation, however, today modern methods of process operation allow for the economic optimization at the same time. The automation and optimization of batch processes pose challenges in several areas: Mastering the high complexity, connecting heterogeneous components by automation, and combining extensive knowledge from both process engineering and automation during project execution. This contribution describes approaches from industrial practice and punctually academic research, which solutions for the challenges are readily available and how to implement these. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Wenzel S.,TU Dortmund | Paulen R.,TU Dortmund | Stojanovski G.,Ss. Cyril and Methodius University of Skopje | Kramer S.,INEOS Cologne GmbH | And 2 more authors.
At-Automatisierungstechnik | Year: 2016

We address the distributed hierarchical optimization of industrial production complexes where the individual plants exchange resources via networks. Due to the site-wide couplings a centralized or a distributed hierarchical optimization is needed to achieve the best overall performance of the site and to balance the networks of the shared resources. We discuss market-like algorithms that set prices of the shared resources in order to influence the individual optimizers so that the overall operation converges to the site-wide optimum. A novel algorithm for price adjustment based on the quadratic approximation of the responses of the individual optimizers is presented. It shows convergence to the site-wide optimum with significantly less iterations in comparison to the standard subgradient-based method for a set of case studies, including a petrochemical complex. © 2016 Walter de Gruyter. Source

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