1. Swiss Federal Institute of Technology, Laboratory for Energy Conversion, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
2. Aristotle University of Thessaloniki, Department of Mechanical Engineering, GR-54124, Thessaloniki, Greece
3. Mitsubishi Heavy Industries Ltd., 3-1-1, Saiwai, Hitachi, Ibraki, 317-8585, Japan
4. Mitsubishi Hitachi Power Systems, 3-1-1, Saiwai, Hitachi, Ibraki, 317-8585, Japan