1. Department of Theoretical Physics, Wigner Research Centre for Physics 1 , Konkoly Thege Miklós u. 29-33, H-1525 Budapest, Hungary
2. Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics 2 , Műegyetem rkp. 3., H-1111 Budapest, Hungary
3. MONTAVID Thermodynamic Research Group 3 , Budapest, Hungary