Computational Energy Systems
The rising energy demand of the growing world population is a significant cause for environmental risks associated with harmful emissions, hazardous waste, destructive land use, etc. This creates a pressing need to avoid or resolve conflicts between a continuing socio-technical development on the one hand and the preservation of the natural basis of our existence on the other. In order to build an ecologically, economically and socially sustainable future, environmental, climate and energy policies target measures such as the decarbonisation of the energy system, resource efficiency, and sustainability, while maintaining energy security. Achieving these goals entails the growing use of renewable energy sources and highly efficient energy conversion technologies.
Current concepts of future energy systems and infrastructures link natural and technical systems in an interactive manner, making them relevant to the major research fields of Earth & Environment and Energy. There is a strong need for methods and tools to design and assess technological options for future energy systems as well as their environmental impact.
It is our mission to provide models and numerical simulation frameworks for the in silico assessment of technologies in the context of transforming and sustainable energy systems. Our particular focus is on the quantification of matter and energy fluxes in those solutions where natural and technical systems meet. Examples for such applications include heat storage and geothermal energy but also the subsurface deposition of waste associated with the energy sector.
Our goal is to develop, implement and apply thermodynamically consistent numerical models for the engineering analysis of multiphysical processes in complex natural and technical energy systems. Our core expertise is the modelling of strongly coupled processes entailing thermal, hydraulic, mechanical, and chemical (THMC) processes. We develop models based on a set of general continuum physical principles in order to maintain their flexibility for a wide range of applications.
The following topics and projects are currently being pursued in collaboration with partners from universities, research institutes, and SMEs. This work is part of the Helmholtz research field "Energy", specifically the programmes "Renewable Energies" as well as "Storage and Cross-Linked Infrastructures".
- Modelling and numerical simulation of the coupled reactive matter and heat transport in thermochemical and adsorptive heat storage devices using methods of high-performance computing (NUMTHECHSTORE).
- Modelling and numerical simulation of dielectric heating for the energy-efficient desorption of adsorbates from nano-porous materials (zeolites).
- Efficient numerical integration of non-linear, inelastic constitutive models for the deformation behaviour of geotechnically relevant materials, e.g., rock salt and peat, considering in some cases finite deformations (ANGUS+).
- Estimating thermo-hydro-mechanical loads in subsurface cement-based sensible heat stores for solar thermal applications along with their environmental impact (IGLU).
- Modelling and numerical simulation of phase change processes in porous media for geotechnical applications, e.g., geothermal systems.
- Numerical simulation of the thermo-hydro-mechanical behaviour of geotechnical salt caverns for matter and energy storage (ANGUS+).
Dr. Thomas Nagel
Dr. Thomas Nagel heads the groups "Computational Energy Systems" at the Helmholtz Centre for Environmental Research - UFZ, as well as "Environmental Geotechnics: Multi-physics simulation for geotechnical system analysis", a joint work group between the UFZ and the Federal Institute for Geosciences and Natural Resources (BGR). He holds an Adjunct Professorship at Trinity College Dublin, Ireland, and his main research interests are continuum mechanics and multiphysical processes in porous media for applications in energy, geotechnics and biology.
During his Master's studies of Mechanical Engineering/Applied Mechanics at Chemnitz University of Technology, he discovered his fascination for coupled problems during several research stays at Rush University Medical Center in Chicago and Eindhoven University of Technology, the Netherlands, where he studied the biomechanical and tribological properties of osteochondral transplants and artificial intervertebral discs as well as the causes of deep tissue injury in skeletal muscle tissue. In 2012 he was awarded his PhD from Trinity College Dublin, Ireland, for a dissertation on the role of mechanical cues in regenerating and engineered skeletal tissues. Since then he has been working at the UFZ as part of a team of scientists developing the numerical simulation framework OpenGeoSys for coupled multiphysical problems. His particular foci are thermochemical heat storage, sensible heat storage in porous media and geotechnical applications in the context of energy supply, storage and waste management.
Dr. Uwe-Jens Görke
Dr. Uwe-Jens Görke has been a staff member of the Department of Environmental Informatics since 2008. He studied Theoretical Mechanics and Applied Mathematics at the University of Kharkov, and holds a PhD in Solid Mechanics. From 1996-2008 he worked at Chemnitz University of Technology. His research interests are related to numerical methods and constitutive modelling with applications in geo-technologies, particularly focused on energy related topics, like geothermal energy, energy storage and carbon dioxide storage. Dr. Görke coordinates work packages of different national research projects and is involved in managing projects during all project stages--from the application for funds to final reporting.
Dr. Xing-Yuan Miao
Dr. Xing-Yuan Miao received her Bachelor's degree in Inorganic Materials Engineering from Chongqing University, China, in 2009. She then went to Huazhong University of Science and Technology in Wuhan where she obtained a Master's degree in Structural Engineering in 2010 and a PhD in Solid Mechanics in 2014. She joined the UFZ in 2015 where she has been working on the IGLU project. Her research interests are solid mechanics, electromechanics and thermomechanics.
Dr. Francesco Parisio
Dr. Francesco Parisio obtained his Bachelor of Science and Master of Science in Civil Engineering from Politecnico di Torino in 2009 and 2011, respectively. After a short period in industry, he was enrolled as a PhD student at the Laboratory of Soil Mechanics of the Swiss Federal Institute of Technology (EPFL). In 2016 he obtained the PhD title in Geomechanics for a dissertation on the constitutive and numerical modeling of shales. He joined the Department of Environmental Informatics at the UFZ in 2017, where he currently works on the development of OGS-6. His research topics include geomechanics, computational mechanics and multiphysics couplings.
Dr. Keita Yoshioka
Dr. Yoshioka joined UFZ in October 2017 to work on computation of fracturing induced by hydraulic and thermal impacts undertaking in subsurface. He received his Bachelor of Science in Resources and Environmental Engineering from Waseda University at Tokyo, Japan in 2003 and PhD in Petroleum Engineering from Texas A&M University at College Station, USA in 2007. From 2007 to 2017, Dr. Yoshioka worked for Chevron at their technology center in Houston conducting internal consulting and corporate R&D on various geomechanical problems including a short assignment to Chevron Geothermal in Jakarta, Indonesia in 2008.
Christoph Lehmann obtained his Bachelor's degree in Physics from the Martin Luther University Halle-Wittenberg in 2011 and his Master's in Physics from the University of Leipzig in 2013. He's been working as a software developer at pwp-systems developing tools for traffic data analysis from 2011-2015. After working on scientific visualisation at the Institute of Computer Science at Leipzig University, he joined the UFZ in 2015 to work on the numerical simulation of thermochemical energy storage (TCES), especially systems based on water adsorption to zeolite. His research interests are the numerical assessment of the energy efficiency of those storage systems and the examination of the coupling between electric and thermal fields during sorption processes in zeolites, particularly regarding dielectric heating phenomena.
Tianyuan Zheng was awarded a Bachelor's degree from the Ocean University of China in 2011, and a Master's degree from Stuttgart University in Germany in 2014. He joined the UFZ in October 2014 and is currently working on the numerical modelling of thermo-hydro-mechanical processes in freezing porous media with applications to ground source heat pump systems. His interest is the study of the influence of freeze-thaw processes on borehole heat exchangers with respect to thermal efficiency and deformation. Tianyuan is also involved in Environmental Informatics' workgroup "Geothermal Systems Analysis".
Dr. Norbert Grunwald (né Böttcher)
Dr. Norbert Grunwald is currently working as a scientist at the Federal Institute of Geosciences in Hanover, Germany, and guest scientist at the UFZ. Prior to this, he was a member of the scientific staff of the UFZ Department of Environmental Informatics, investigating the deformation of gas storage caverns in salt rock due to fluctuating operation pressures.
After his graduation in Water Supply Management and Engineering in 2007, Dr. Grunwald worked at the Institute for Groundwater Management at Dresden University of Technology, Germany, as a lecturer and research scientist. He received his PhD for developing a mathematical model for the simulation of non-isothermal, compressible multiphase flow processes within the context of enhanced gas recovery.
In his recent research project, Dr. Grunwald is studying the impact of geological CO2-Storage on the reservoir. His research interests cover coupled THM modelling and model development.
Simone Semprini obtained his Bachelor’s and a Master’s degree in Energy Engineering from the University of Bologna, Italy, in 2011 and 2014, respectively. After a period in industry, in 2016, he joined the company Solar and Heat Technology Stuttgart, a spin-off of the University of Stuttgart, closely cooperating with the Institute of Thermodynamics and Thermal Engineering (ITW). In 2017, he joined the UFZ as a visiting scientist, collaborating with the group of Computational Energy Systems. His work focuses on numerical modelling of thermochemical energy storage with sorption processes.
Lin Zhang is currently enrolled in PhD studies in Geotechnical Engineering in the Department of Civil, Structural and Environmental Engineering at Trinity College Dublin. She obtained a Master's degree from the same institution in 2012 and a Bachelor's degree in Water Conservancy and Hydropower Engineering at Wuhan University, China in 2009. Her current work focuses on thermodynamically consistent constitutive modelling of peat soils. Within this framework, large strain, rate-dependency and structural anisotropy of peat compression are modelled under three-dimensional conditions. She performs the modelling work in collaboration with the group Computational Energy Systems at the UFZ.