Competencies

The Institute of Thermodynamics at Leibniz University Hannover serves as a point of contact for companies seeking thermodynamic expertise at a scientific level—practical, measurable, and ready for application. Our research combines fundamental scientific methodology with a commitment to solving real-world technical challenges. We cover a broad spectrum: from the precise measurement of thermophysical material data to the design of heat exchangers and cyclic processes, all the way to the modeling of complex energy systems. As a unit of Leibniz University Hannover, we combine excellent scientific infrastructure with direct access to the latest research findings—thus creating the conditions for collaborations that generate real industrial value.

A central pillar of our work is thermodynamic system analysis. We analyze and evaluate thermal systems holistically—from measurement balances and component analyses to energy and exergy balances. This forms the basis for physically sound models that support companies in the design, optimization, and operation of complex plants and processes. We work closely with our industry partners to develop practical solutions that can be directly integrated into existing processes.
•    Preparation and evaluation of measurement and component balances
•    Energy and exergy analysis to identify sources of loss and optimization potential
•    Physically sound modeling for thermal systems and processes
•    Design and evaluation of complex systems based on thermodynamic parameters
•    Consulting and support for process optimization on an industrial scale
 

Heat exchangers are a central component in nearly all industrial processes, and their precise design plays a decisive role in determining a plant’s efficiency. We measure and calculate heat transfer coefficients, design equipment to meet specific requirements, and have expertise across a broad spectrum—from two-phase flows and high-temperature applications to compact, additively manufactured designs. For companies seeking to increase efficiency or test new technologies, we offer both numerical methods and experimental validation on our own test benches. In addition, we investigate new surface technologies and manufacturing processes that have the potential to shape the next generation of heat exchangers.
•    Measurement and calculation of heat transfer coefficients under real operating conditions
•    Design and optimization of heat exchangers for high-temperature and high-pressure applications
•    Experimental and numerical investigation of two-phase flows and phase change processes
•    Development and testing of additively manufactured compact heat exchangers for new application areas
•    Investigation of functionalized surfaces to enhance heat transfer performance
 

Hydrogen-based energy supply is one of the defining themes of the energy transition—and an area in which we have many years of in-depth expertise. Our focus is on the experimental characterization and simulation-based design of high-temperature solid oxide fuel cells (SOFCs), as well as on the investigation of electrolysis systems and electrochemical thermoelectric cells. We support the entire development chain: from precise single-cell testing and stack design to the thermodynamic evaluation of the overall system. In addition, we investigate the integration of these technologies into higher-level energy systems and offer industry partners tailored support in the design, evaluation, and further development of hydrogen-based concepts.
•    Simulation-based design and optimization of fuel cell systems
•    Investigation of high-temperature electrolytic cells (SOEC) for green hydrogen production
•    Thermodynamic analysis and evaluation of hydrogen-based integrated systems
•    Development and characterization of electrochemical thermoelectric cells for the utilization of high-temperature heat
 

Reliable process simulations and plant designs stand or fall on the quality of the underlying material data. Using precision measurement technology developed in-house, we determine thermophysical properties across a wide range of temperatures and pressures—for both pure substances and technically relevant mixtures. Our measurements are traceable to international standards and thus meet the highest metrological requirements. For companies in the process, energy, and refrigeration sectors, we offer both targeted individual measurements and comprehensive data campaigns—thereby providing the robust data foundation required for modern process development.
•    Precision measurements of density, heat capacity, and thermal conductivity across wide temperature and pressure ranges
•    Determination of sound velocity and emissivity for technically relevant fluids and solids
•    Adsorption measurements on porous and non-porous materials under defined conditions
•    Traceable calibration of temperature and pressure measuring instruments according to international standards
•    Provision of verified material data as a basis for process simulations and equations of state
 

From the design of efficient heat pumps and the analysis of thermodynamic cycles to innovative energy storage concepts, we are experts in simulation and experimental testing using both conventional and natural working fluids. We place particular emphasis on high-temperature applications and dynamic operation—topics that are becoming increasingly important for industrial heat supply and cross-sector energy integration. Our pilot plant facilities enable the validation of simulation models under real operating conditions, allowing research findings to be directly transferred to industrial applications.
•    Design and simulation of heat pumps using natural refrigerants for high-temperature applications
•    Thermodynamic analysis and optimization of cycles for industrial heat supply
•    Development and validation of transient simulation models for heat pumps and energy storage systems
•    Investigation of novel energy storage concepts, particularly electrothermal storage systems
•    Development of dynamic control strategies for the efficient operation of thermal systems
 

Our experimental approach is complemented by modern modeling and simulation methods. Transient system models, digital twins, and machine learning enable us to operate systems proactively, identify optimization potential early on, and significantly shorten development times. We apply these methods both in basic research and in direct collaboration with industry partners—thus bridging the gap between scientific depth and practical applicability. Of particular note is the use of symbolic regression and optimal design of experiments, which allow us to significantly reduce the effort required to develop precise thermodynamic models.
•    Development of transient system models and digital twins for thermal systems
•    Use of machine learning for efficient modeling of thermodynamic properties
•    Optimal design of experiments to specifically reduce experimental measurement and development efforts
•    Numerical simulation of thermal and fluid dynamic processes using validated models
•    Simulation-based design and operational optimization of complex energy systems