Stergios Vakalis

Assistant Professor – Environmental Engineering and Science Section

Office: Xenia A Building, Room 304

Phone number: (+30) 22510 36240


  • Postdoctoral Researcher (Scholarship of Academic Excellence ΙΚΥ – Siemens), School of Chemical Engineering, National Technical University of Athens, Greece (2017)
  • Ph.D., Faculty of Science and Technology, Libera Università di Bolzano, Italy (2016)
  • MSc in Sustainable Resource Management, Technische Universität München, Germany (2012)
  • Diploma, School of Environmental Engineering, Technical University of Crete, Greece (2010)
  • Bioenergy and Biofuels
  • Energy Modelling
  • Waste-to-energy
  • Renewable Energy Sources (technologies, policy and management)
  • Thermodynamic Analysis of Energy Systems
  • Life-cycle assessment and Multi-criteria Decision Making (energy systems, resources/waste management
  • Vakalis, S., Moustakas, K., Heimann, R., Loizidou, M. (2019). The Renewable Battery Concept via conversion of agricultural waste into biocoal using frictional pyrolysis. Journal of Cleaner Production 229, 1183-1188.
  • Vakalis, S. and Moustakas, K. (2019). Modelling of Advanced Gasification Systems (MAGSY): Simulation and Validation for the Case of the Rising Co-current Reactor. Applied Energy 242, 526 – 533.
  • Vakalis, S., Moustakas, K. and Loizidou, M. (2019). Energy Efficiency of Waste-to-Energy Plants with a Focus on the Comparison and the Constraints of the 3T Method and the R1 Formula. Renewable & Sustainable Energy Reviews 108, 323 – 329.
  • Vakalis, S., Moustakas, K., Benedetti, V., Cordioli, E., Patuzzi, F., Loizidou, M., Baratieri, M. (2019). Centralized collection scheme and torrefaction of spent coffee grounds – an introduction to the concept of the “COFFEE BIN”. Environmental Science and Pollution Research,
  • Vakalis, S., and Moustakas, K. (2019). Applications of the 3T Method and the R1 Formula as Efficiency
    Assessment Tools for Comparing Waste-to-Energy and Landfilling. Energies 12, 1066.
  • Vakalis, S., Ahmad, J., Heimann, R., Patuzzi, F., Baratieri, M. (2018). The Case of Frictional Torrefaction and the Effect of Reflux Condensation on the Operation of the Rotary Compression Unit. Bioresource Technology 268, 91 – 96.
  • Vakalis, S., Moustakas, K. and Loizidou, M. (2018). Assessing the 3T method as a replacement to R1 formula for measuring the efficiency of waste-to-energy plants. Waste Management & Research 36, 810 – 817.
  • Vakalis, S., Moustakas, K., Sénéchal, U., Schneider, R., Salomo, B., Kurz, M., Malamis, D., Zschunke, T. (2018). Utilization of thermodynamic modelling for assessing the operation of the after-burner in a Biomass Gasifier. Journal of Cleaner Production 170; 70 – 75.
  • Vakalis, S., Semitekolos, D., Novakovic, J., Moustakas, K., Zoumpoulakis, L. and Loizidou, M. (2018).  Introduction to the concept of particleboard production from mixtures of sawdust and dried food waste. Waste and Biomass Valorization 9, 2373–2379.