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Department of Electrical Engineering, Mechanical Engineering and Technical Journalism

Portraet Tanja Clees EMT 20180201 Foto E. Tritschler (DE)

Prof. Dr Tanja Clees

Ingenieurwissenschaften/insbesondere Ingenieurinformatik, Modellbildung und Simulation/Forschungsprofessur/Mitglied des TREE-Direktoriums


Prof. Dr Tanja Clees, Prof. Dr Tanja Clees

Research fields

  • Energienetze (Gastransport, Fernwärme, Strom)
  • Energiemanagement
  • Sektorkopplung (v.a. Wasserstoff)


Sankt Augustin


B 245


Grantham-Allee 20

53757 Sankt Augustin


Sankt Augustin


Schloss Birlinghoven

53754, Sankt Augustin


+49 (2241) 14-4074

Curriculum vitae

  • seit 1998 tätig am Institut SCAI der Fraunhofer-Gesellschaft (früher GMD)

  • 1999 Diplom in Mathematik (Nebenfach phys. Chemie), Universität zu Köln

  • 2000 Preis für die „Beste Diplomarbeit“ der GMD: „Mehrgitterverfahren für die zwei- und dreidimensionale Poissongleichung mit periodischen Randbedingungen und eine Anwendung in der Molekulardynamik“

  • 2004 Promotion zur Dr. rer. nat. (Angewandte Mathematik), Universität zu Köln, mit der Dissertation „AMG Strategies for PDE Systems with Applications in Industrial Semiconductor Simulation“

  • 2007 bis 2010 Leitung der Gruppe "Robust Design" am Fraunhofer SCAI

  • 2007 Aufnahme in den Kreis der Jungwissenschaftler der Stiftung Werner-von-Siemens-Ring

  • 2008 Aufnahme in das Programm "Fast Track" der Robert Bosch Stiftung für Postdoktorandinnen der Naturwissenschaften und Mathematik

  • 2008: Portrait im Buch „Frauen, die forschen“ (B. Flitner, J. Rubner) als eine von 25 Forscherinnen aus Naturwissenschaften und Mathematik

  • seit 2009 „Vintage Class“ (High Potentials) der Fraunhofer-Gesellschaft

  • 2010 Aufnahme in das Portal

  • 2011 bis 2018 Leitung der Abteilung "High Performance Analytics" am Fraunhofer SCAI

  • seit dem 1. Februar 2018 Professur für Ingenieurwissenschaften an der Hochschule Bonn-Rhein-Sieg

  • seit 2020 Mitglied des Direktoriums des TREE-Instituts

  • seit dem 1. September 2021 Forschungsprofessorin im Fachbereich EMT



  • BMWi MathEnergy (2016 bis 2021, Leitung: T. Clees): "Mathematische Schlüsseltechnologien für Energienetze im Wandel", 
  • EFRE/NRW ES-FLEX-INFRA (2016 bis 2020, Leitung: T. Clees): "Modellierung und Optimierung der Kopplung von Energiesektoren zur Flexibilisierung der Energieinfrastruktur"

Research Projects

Green hydrogen from brewing biomass

In this project, the Bonn-Rhein-Sieg University of Applied Sciences will analyse the availability of brewer's grains and the sustainability of procurement and processing. The design of a suitable electrochemical electrolysis cell will be carried out at Robert Gordon University.

Project management at the H-BRS

Prof. Dr Tanja Clees Prof. Dr Stefanie Meilinger
Optimization of dimensioning and control of a hydrogen-based hybrid energy storage system based on meta-modeling

Hydrogen is a promising energy carrier that has received more attention in recent years. Through electrolysis, excess renewable energy can be converted into hydrogen, stored, converted back into electricity at a later time, or used in other energy sectors. Storage systems based on this principle can be implemented at different scales, ranging from self-sufficient energy supply for several houses, to stabilization of energy supply networks. PhD student Michael Bareev-Rudy is working on the meta-modeling of hydrogen-based hybrid storage systems to enable optimal sizing and control for different scenarios. 


TransHyDE-Sys is a system analysis project and is a joint project within the lead project TransHyDE. In addition to the system analysis, there are also implementation and research projects on the topic of H2 transport within the lead project. As a cross-sectional project, the system analysis performs a special function: On one hand, essential system knowledge for the construction and coupling of the energy infrastructures is generated with the help of own modeling and simulation work as well as ecological analyses. On the other hand, observations, analyses and requirements of the implementation and research projects are to be recorded, compared and integrated within existing knowledge. The results are to be incorporated into a continuously adapted roadmap, which will then help shape the content of the next project phases and provide important recommendations for action for external stakeholders. The sub-project MechaMod of H-BRS focusses on the development of physical-chemical models for all relevant mechatronic components of networks for transport of different gas compositions to be analyzed. This includes components for coupling gas and power networks and for driving gas networks, especially electrolysers, fuel-cell power plants, compressor and regulator stations. A particular challenge consists in modeling dependencies from the actual gas composition including impurities. Prototypes of the novel models will be integrated into the simulation frameworks used by partners. As a main result, models for the relevant mechatronic components shall be available, based on differential equations and characteristic maps and allowing for system simulation and analysis of potential transformation pathways to a hydrogen transport infrastructure. An accompanying analysis of technical limits and contingency scenarios will be performed. Additional contributions support model comparison, life cycle analysis, cooperation with stakeholders and the roadmap.

Project management at the H-BRS

Prof. Dr Tanja Clees