1. Department of Mechanics “Radu P. Voinea”, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania
2. Department of Technical Thermodynamics, Engines, Thermal and Refrigeration Equipment, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania
3. Department of Energy Generation and Use, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania
4. Electrical Systems Department, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania