1. Ph.D. Student, Laboratory of Applied Thermodynamics, School of Mechanical Engineering, Thermal Engineering Section, National Technical Univ. of Athens, Heroon Polytechniou 9, Zografou Campus, Athens 15780, Greece (corresponding author).
2. Professor, School of Mechanical Engineering, Thermal Engineering Section, National Technical Univ. of Athens, Heroon Polytechniou 9, Zografou Campus, Athens 15780, Greece.
3. Laboratory of Applied Thermodynamics, School of Mechanical Engineering, Thermal Engineering Section, National Technical Univ. of Athens, Heroon Polytechniou 9, Zografou Campus, Athens 15780, Greece.