Dariusz Butrymowicz, Prof. PhD, DSc, is a full professor at Bialystok University of Technology. His Master’s degree was obtained in 1993 at Gdansk University of Technology, Poland. In 1997, he received his PhD, and his habilitation, both in mechanics, in 2005 at the Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences in Gdansk, Poland. He has been a full professor since 2014. His research area covers refrigeration and heat pumps system, heat transfer and heat exchangers, modelling of thermal-flow processes, two-phase flow, chemical engineering and processing, waste heat utilization. He is an expert of the National Refrigeration Forum – Employer’s Community in personal certification and examination in the refrigeration air-conditioning and heat pumps technology, member of Examination Committee of Renewable Energy Sources at the Office of Technical Inspection, member of commission B2: Thermodynamics and Transfer Processes, International Institute of Refrigeration, Member of Section of Thermodynamics and Combustion of Polish Academy of Sciences, and Head of the Department of Thermal Engineering, Bialystok University of Technology.