Prof. Tsatsaronis and Dr. Kosmadakis visited a group of researchers and staff of the National Technical University of Athens (NTUA), and in particular the staff of the Thermal Engineering Department of the School of Mechanical Engineering. This visit took place on the 14th of July 2025 followed by an extended tour at different laboratories and experimental facilities. The main conclusion is that there are several collaboration fields to be explored in the near future.