1. Rheinische Fachhochschule, Köln University of Applied Sciences, Vogelsanger Str. 295, 50825 Cologne, North-Rhine-Westphalia, Germany
2. Technische Hochschule Ingolstadt, Esplanade 10, 85049 Ingolstadt, Bavaria, Germany
3. Institute of Engineering Thermodynamics, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, North-Rhine-Westphalia, Germany