Evangelos Bellos is an assistant professor at the Department of Mechanical Engineering, School of Engineering, University of West Attica, Athens, Greece. He earned a Ph.D. in the Thermal Department, School of Mechanical Engineering, National Technical University of Athens (NTUA), Greece. He was a postdoctoral visiting researcher in the “Solar and other energy systems laboratory” of NCSR “DEMOKRITOS”, Greece from 2017 to 2018, a postdoctoral researcher at the School of Mechanical Engineering, National Technical University of Athens (NTUA), Division of Thermal Engineering, in the Laboratory of Refrigeration, Air Conditioning, and Solar Energy from 2017 to 2024, and a postdoctoral research associate with CERTH/CPERI, participating in European HORIZON research projects from 2022 to 2023. His research interests include the following: thermodynamics, thermodynamic cycles, organic Rankine cycle, exergy analysis, thermal behavior of buildings, refrigeration cycles, absorption refrigeration machines, solar energy, thermal solar collectors, concentrating solar collectors, optical analysis, energy storage systems, waste heat recovery, polygeneration, and nanofluids.