A framework for the integration of design and operation under uncertainty using dynamic perturbation and chance constraints

Process design is a fundamental aspect of developing new processes in the chemical industry. Often, process design is performed sequentially. In the first step, the design is found by optimization under steady-state conditions and under consideration of economic criteria. In the second step, the control scheme is developed. In this work, a simultaneous approach is taken what is known in the literature as integration of design and operation (or: integration of design and control). For this purpose, the thesis first outlines the state-of-the-art for the solution of such problems and discusses the theoretical background of the thesis. Afterwards, the methodology developed in this thesis is discussed. This methodology allows the integration of design and operation in an optimization problem in which parametric uncertainty is included without scenario-based recourse and without the sequential solution on individual realizations of the uncertain parameters. This goes beyond the pure challenge of solving a dynamic equation system. The methodology also suggests how to estimate and treat parametric uncertainty and proposes an approach to dealing with dynamic variability of inputs. The methodology is then applied on two case studies: a stirred reactor and the CO2-based synthesis of methanol. The design obtained with the proposed methodology is compared to a design that is obtained only under consideration of steady-state conditions. In addition, the impact of parametric uncertainty on the design is studied. Due to the proposed transformation of dynamic system into purely algebraic systems, the optimization problems can be solved without methods for the integration of differential equation systems. The compiled results are finally summarized and critically discussed in order to formulate aspects for future research.

Author dc:creator

• Hoffmann, Christian

Advisor dc:contributor.advisor

• Repke, Jens-Uwe

Licence dc:rights.uri

• https://creativecommons.org/licenses/by/4.0/

Language dc:language.iso

en

Identifier URI

https://doi.org/10.14279/depositonce-19127

OAI identifier oai:identifier

oai:depositonce.tu-berlin.de:11303/20329