Zittau thermodynamics experts present research results at three conferences in the USA.
From the Department of Technical Thermodynamics at the Faculty of Mechanical Engineering, Prof. Dr.-Ing. habil. Hans-Joachim Kretzschmar and Dr.-Ing. Sebastian Herrmann as well as Dr.-Ing. Matthias Kunick, formerly Department of Engineering Thermodynamics, now Idaho National Laboratory (INL), Idaho Falls, Idaho, USA, took part in the most important international conference in the field of thermophysical properties of gases, liquids and solids. This conference only takes place every three years.
Dr. Herrmann presented a newly developed calculation equation for the dynamic viscosity of isobutane. Dr. Herrmann laid the foundations for the creation of such transport correlations as part of his doctorate at the University of Rostock. The completion of this work took place during his work as an academic assistant and lecturer at the Zittau/Görlitz University of Applied Sciences.
Dr. Kunick presented the method developed at the Department of Technical Thermodynamics for the rapid calculation of the material values of working fluids in energy technology using spline interpolation in a poster. This method, which was developed as part of his cooperative doctorate with the Technical University of Dresden and the German Aerospace Center (DLR), is particularly suitable for calculating the material properties of real gases and liquids in numerical flow simulations.
Two posters and a computer presentation presented material value calculation programs that have been developed in recent years at the Department of Technical Thermodynamics under the direction of Prof. Kretzschmar. For many software products used in everyday engineering, such as Excel, MATLAB and Mathcad, connections for these material value programs were presented.
Prof. Kretzschmar and Dr. Herrmann took part in the 18th meeting of the International Association for Transport Properties (IATP) in Boulder in order to initiate possible new research projects in the field of transport properties of gases and liquids at the Department of Engineering Thermodynamics.
Dr. Herrmann presented new results on the calculation of the viscosity of ethane, which lead to an improvement of the previous viscosity correlation and will be taken into account in the reference database of the National Institute of Standards and Technology (NIST).
Dr. Herrmann presented the results of a research project on the transport properties of humid air at the conference of the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) in Houston, Texas, USA. Dr. Herrmann and Prof. Kretzschmar also presented calculation programs for the thermodynamic properties of humid air, which were developed at the Zittau/Görlitz University of Applied Sciences.
Another important aspect of their participation was their involvement in the research project to develop a new ASHRAE standard for calculating the thermodynamic properties of humid air. On the basis of this work, ASHRAE announced a contract for a further research project on the properties of combustion gas mixtures.
