Professor
Address: National Technical University of Athens,
Heroon Polytechniou 9, 15772 Zografou, Athens, Greece,
School of Mechanical Engineering, Section of Thermal Engineering,
Tel. (+30) 210 772-3669
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Personal Homepage: -
Studies
| 2021 | PhD, School of Mechanical Engineering, NTUA, Greece |
| 2018 | MSc in Mechanical Engineering track Sustainable Processes and Energy Technologies, Faculty of Mechanical Engineering, TU Delft, The Netherlands |
| 2016 | MSc in Power Production and Management, School of Electrical and Computer Engineering, NTUA, Greece |
| 2014 | Diploma in Mechanical Engineering, NTUA, Greece |
Professional Experience
| 2026 - today | Assistant Professor, NTUA, Greece |
| 2025 - 2026 | External Professor School of Applied Arts and Sustainable Design, Hellenic Open University, Patras, Greece |
| 2023 - today | Visiting Professor, Huazhong University of Science and Technology, Wuhan, China |
| 2024 - 2026 | External Research Associate, Laboratory of Applied Thermodynamics, NTUA, Greece |
| 2021 - 2026 | External Research Associate, Laboratory of Steam Boilers and Thermal Plants, NTUA, Greece |
| 2018 - 2021 | Research Assistant, Laboratory of Steam Boilers and Thermal Plants, NTUA, Greece |
| 2014 - 2017 | External Research Assistant, Laboratory of Steam Boilers and Thermal Plants, NTUA, Greece |
Research
Modeling, optimization and techno-economic/environmental assessment of energy and refrigeration systems; heat pumps; refrigeration and air-conditioning systems; adsorption chillers; CO₂ applications and low-GWP refrigerants; waste heat recovery; geothermal and solar thermal energy utilization; thermal energy storage; advanced thermodynamic cycles; molecular thermodynamics and equations of state; artificial intelligence methods applied to energy systems; machine learning, digital twin, predictive control and predictive maintenance techniques for energy, industrial and specialized applications.
Distinctions
| 2021 | “Iakovos Gkiourounlian” Award for the year 2021, for the second-best PhD dissertation at the School of Mechanical Engineering, NTUA, in a field of industrial interest |
| 2021 | "Prof. Gianfranco Angelino" award for the best poster at the ORC 2021 - 6th International Seminar on ORC Power Systems (11-13 October 2021). Poster title: Economic model predictive control on a waste heat recovery micro ORC. Authors: E. Varvagiannis , I. Kalogeropoulos, T. C. Roumpedakis, P. Pallis, S. Karellas, H. Sarimveis |
| 2018 - 2021 | Scholarship from the Onassis Foundation for doctoral studies (ID: G ZO 025-1/2018-2019) |
| 2017 - 2020 | Thomaideio Awards for publications in scientific journals in the years 2017, 2018, 2019, and 2020 |
| 2019 | Scholarship from the Polish National Agency for Academic Exchange for participation in the programme “International Scholarship Programme for PhD Candidates and Academic Staff” |
Member of:
• Technical Chamber of Greece.
• Chair of the Editorial Board of the Knowledge Center of Organic Rankine Cycle (KCORC), 2021-today.
• Guest Editor of the Special Issue of Energies (MDPI), titled “Advanced Heating and Cooling Technologies for Sustainable Buildings”, 2025–2026.
• Guest Editor of the Special Issue of Energy (Elsevier), titled “37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 2024”, 2024–2025.
• Guest Editor of the Special Issue of Renewable Energy (Elsevier), titled “37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 2024”, 2024–2025.
• Guest Editor of the Special Issue of Energies (MDPI), titled “Advances in Techno-Economic Analysis and Life Cycle Assessment of Solar Energy Systems”, 2023.
• Guest Editor of the Special Issue of Renewable Energy (Elsevier), titled “ORC in Renewable Energy Systems”, 2020.
• Reviewer Chair of the conference ECOS2024: 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 2024, Rhodes, Greece.
• Member of the Review Committee of ORC2021: 6th International Seminar on ORC Power Systems, Munich, Germany, 2021.
• Member of the Scientific Committee of ORC2019: 5th International Seminar on ORC Power Systems, Athens, Greece, 2019.
• Reviewer for the international scientific journals Renewable and Sustainable Energy Reviews, Energy, Renewable Energy, and Applied Thermal Engineering.
• Member of the Working Group for the preparation of the NTUA Sustainability Plan.
• Member of the Working Group for the revision of T.O.T.E.E. 20701-5/2017, Cogeneration of Electricity, Heating and Cooling: Installations in Buildings.
Current Duties
Teaches at NTUA
Undergraduate: Applied Thermodynamics of Pure Substances, Applied Thermodynamics of Mixtures, Thermodynamics Software, Industrial Refrigeration Systems.
Postgraduate: Thermodynamics and Heat Transfer; Energy Efficiency in Buildings – Active Systems (Postgraduate programme: “Power Production and Management”); Clean Technologies (Postgraduate programme: “Environment and Development”).
