**About the Editors**

**Sławomir Pietrowicz** started his research and teaching work at Wrocław University of Science and Technology, Poland in 1997. In the years 2000-2002, he conducted research at Shizuoka Univerisity, Japan as the beneficiary of the Monbusho Scholarship. In 2004 obtained his Ph.D. Over the years he collaborated with various scientific centers (CERN Switzerland, CEA/Saclay France, ESS Sweden, KEK Japan), between 2009 and 2011 worked/stayed at CEA, Saclay, France as a researcher in the cryogenics field. After habilitation in 2014, he was appointed Professor at Wroclaw University of Science and Technology. He was the Vice-Dean for Science and International Cooperation at Faculty of Mechanical and Power Engineering, Wroclaw University of Science and Technology. At present he is the Head of the Department of Thermodynamics and Renewable Energy Sources Department. His research topics cover various fields i.e. thermodynamics, cryogenics, RES, CFD, two-phase flow in capillary tubes.

**Izabela S ´owka** has been active at the Wrocław University of Science and Technology, where she is currently employed as a professor in the Department of Environment Protection Engineering. She is the initiator and president of the Center for Sustainable Development and Climate Protection. She is also a member of many workgroups and committees at the academical, regional and national level. Among her other achievements one ought to mention the membership of the Environmental Engineering Committee of the Polish Academy of Sciences and vice-chairmanship of the State Council for Environmental Protection and Scientific Council at the Institute of Environmental Engineering of the Polish Academy of Sciences in Zabrze. Her research topics are related to identifying air pollution and its sources, air quality assessment, analysis of the health impacts of air pollution, carbon footprint, global atmospheric fenomena assessment, RES.

**Piotr Kolasi ´nski** is connected with the Wrocław University of Science and Technology. He obtained his professional experience initially as an assistant at the Department of Thermodynamics of Institute of Power Engineering and Fluid Mechanics, where he was involved in research on the potential application of multi-vane expanders in ORC (Organic Rankine Cycle) systems. In 2010 after obtaining his Ph.D., he held an internship at the Technical University of Munich (TUM), Germany, in which he took part in a training program in the field of nuclear energy. In 2017 he obtained habilitation and in 2019 he was appointed Professor at Wroclaw University of Science and Technology. He is the Head of Laboratory of Thermodynamics and Thermal Properties of Materials. His research topics are related to volumetric machines, organic Rankine cycle (ORC) systems, waste energy recovery, renewable energy, thermodynamics and heat transfer.
