Chair of Turbomachinery (University of Duisburg-Essen)

#GuestLecture Siemens Energy: Dynamics of Sealing Technology We were pleased to have Klaus Steff as a guest speaker in our lecture series. His topic was 'A Combined Experimental and Numerical Approach to Quantifying Flow-Induced Dynamic Forces in Seals.' The #GuestLecture focused on the challenges and solutions associated with very high operating pressures, necessary in applications such as CO2 compression and oil extraction from deep reservoirs. Through the use of specialized test rigs and detailed CFD simulations, Siemens Energy aims to develop a deep understanding of these forces to enhance the #stability and #efficiency of #turbomachines. Many thanks to Klaus Steff for his engaging presentation on this interesting topic.

Our chair had the opportunity to participate in the Turbo Expo ASME 2024 in London. This event served as a central meeting point for professionals in the field of turbomachinery and provided an excellent platform for knowledge exchange. Through lectures, technical presentations, and exhibitions, the latest innovations and developments were showcased. This not only facilitated networking among participants but also allowed our chair to present their research findings to an international audience, gaining valuable feedback.

Guest Lecture Siemens Energy: New Developments in the Use of Active Magnetic Bearings in Turbo Compressors We welcomed Dr.-Ing Frank Heidtmann at Siemens Energy for a #GuestLecture. His presentation focused on the "Application of Active Magnetic Bearings in Turbo Compressors." #ActiveMagneticBearings are revolutionizing turbo compressor technology with enhanced control methods such as PID controllers and advanced control algorithms, enabling improved rotor dynamics and system stability. Particularly in high-speed and high-pressure environments, like the #GroningenGasField project, they offer impressive performance improvements. This technology addresses complex challenges like linearization and control loops, and is complemented by in-depth analyses in modal analysis and rotor dynamics, setting new standards of efficiency and reliability in the #industry. A big thank you to Dr.-Ing Frank Heidtmann for the informative #GuestLecture!

Guest Lecture Siemens Energy: Advanced Materials for Turbo Compressors – Adaptations to Extreme Operating Conditions We were pleased to welcome Dr.-Ing. Beate Langenhan at Siemens Energy for a #GuestLecture. The focus of her presentation was on "Materials for Turbo Compressors/ Werkstoffe für Turboverdichter". These #materials are important for the development of #TurboCompressors as they have to meet specific technical and environmental challenges. Particular attention was paid to operating temperatures, pressure, corrosion resistance, and mechanical stress. The lecture focused on the targeted selection of #materials for specific operating conditions, such as extremely high or low temperatures and corrosive environments. Dr.-Ing. Langenhan discussed various manufacturing processes and elaborated on their impact on the properties of the #materials used, including the role of additive manufacturing techniques. We sincerely thank Dr.-Ing. Beate Langenhan for her informative lecture. Her expertise provided us with valuable insights and inspiration.

Guest Lecture at Siemens Energy: Focus on Innovative Energy Technologies We were excited to host Dr. Boris F. Kock, Head of SGT5-4000F Operations at Siemens Energy, for a #GuestLecture on Thursday, July 4th. His presentation provided us with valuable insights into the latest technological developments and operational practices in the field of #GasTurbines. Dr. Boris F. Kock led us through innovations in #CombustionSystems, including an intensive examination of their design, as well as the extensive testing procedures and their #validation. Another key topic was the use of hydrogen as a revolutionary fuel, which enables a significant reduction in CO2 emissions. He also highlighted advanced #CombustionTechnologies developed to reduce NOx emissions, and the optimization of operating modes for improved energy efficiency and environmental compatibility. The latest advancements in the design of combustion chambers and the use of various fuels to enhance efficiency and environmental friendliness were also discussed. A big thank you to Dr. Boris F. Kock for the deep insights into the challenges and solutions in the field of #GasTurbine technology and for the inspiring discussion.

Congratulations! Our employee Katharina Tegethoff has successfully presented her #dissertation titled "Beitrag zur Entwicklung numerischer Verfahren für die Untersuchung von Phasenwechselvorgängen kompressibler nicht-idealer Fluide.” Her #research led to the development of advanced #NumericalMethods for designing turbomachines that work with non-ideal and multiphase fluids. These methods enhance the simulation of flows and phase transitions, taking into account the complex properties of the #fluids, which significantly improves the efficiency and accuracy of #TurbomachineDesign. Her #DoctoralHat, decorated with a racing bike and a miniature solar-powered wind turbine, reflects her passions for cycling and wind turbines. Katharina Tegethoff has been highly valued by students and colleagues for her her knowledge and support, which is also shown in her assistance with designing #DoctoralHats for others—symbolized by the small graduation hats on her own hat. Katharina Tegethoff presented her research findings at the ASME Turbo Expo 2024 in London and spends six months conducting research at the University of Cambridge now, symbolized by the double-decker bus on her doctoral cap. Other elements on the hat highlight her significant contributions during her time with our chair. The chair warmly congratulates Katharina Tegethoff on her successful thesis defense and wishes her all the best in her future!

Guest Lecture at Siemens Energy: The Future of Gas Turbine Upgrades at Siemens Energy We were honored to welcome Marc Tertilt, Head of SGT5-4000F Product Development at Siemens Energy, on June 20, 2024, for a guest lecture on the 'Modernization and Upgrades of Stationary Gas Turbines'. During his presentation, Mr. Tertilt highlighted the critical need for #turbines that adapt to fluctuating power demands and the importance of fuel flexibility and emission reductions. He discussed Siemens Energy's commitment to continuously enhancing #TurbineEfficiency and reducing operational costs, notably through various performance-improving #upgrades to their SGT5-4000F models. Mr. Tertilt detailed several #TechnologicalAdvancements, such as the 'Hydraulic Clearance Optimization,' which increases efficiency by minimizing turbine clearance spaces. He also emphasized the environmental and economic benefits of these #upgrades, including lower CO2 emissions and reduced fuel costs. The lecture covered the full cycle from idea to #implementation and #testing, enriched with examples from real #applications and customer feedback. Many thanks to Mr. Tertilt for his comprehensive and insightful presentation on such an important topic.

The 6th European Conference on Supercritical CO2 (sCO2) for Energy Systems will take place in Delft, Netherlands. This event will include #TechnicalSessions, #PosterPresentations, #KeynoteSpeeches, and #ExpertPanels. Key discussion topics are applications in energy systems, turbomachinery, heat exchangers, and specialized sCO2 experiments. For more details, please refer to the information in the PDF.

Excursion: Insights at Siemens Energy in Berlin From June 13 to 14, 2024, we visited Siemens Energy in Berlin. On the first day, we started with a comprehensive safety briefing, setting a serious tone for our exploration. This was followed by a fascinating demonstration in the #EnergyLandscapeLab, where we interactively explored various energy scenarios. A highlight of the day was the guided tour of the production facilities, providing real insights into the #manufacturing processes. Discussions with experts provided practical insights into the technical and operational challenges at Siemens Energy, also offering a glimpse into #CareerOpportunities and sharing personal experiences of employees. On the second day, we visited the #ServiceTrainingCenter, where the focus was on #HandsOnLearning. We removed blades, installed combustion chamber stones, and tightened screws hydraulically. Observing a rotating rotor (below turning gear) was as impressive as examining and even deconstructing a gas turbine using #AugmentedReality. These #HandsOnActivities were a highlight of the excursion. We thank Siemens Energy for the warm welcome and the great opportunity to learn and experience so much.

Guest Lecture at Siemens Energy: Mastering the Energy Trilemma Yesterday, we welcomed Dr. Verena Klapdor, SVP Gas Services Europe & Africa at Siemens Energy, as a guest speaker in our lecture on gas turbines. Dr. Verena Klapdor presented on the topic "The Role of Gas Turbines in Future Energy Systems". Her presentation delivered significant insights into innovative technologies and strategies for #decarbonization that are crucial to the energy transition. This topic is of global significance as we strive for a more #sustainable #energy future worldwide. Dr. Verena Klapdor discussed how the energy trilemma - the balance between #affordability, #reliability, and #sustainability - can be effectively managed. Many thanks to Dr. Verena Klapdor for this enlightening insight into a critical issue!