José Mª P Sala Lizarraga got a Ph.D. in Thermal Engineering at the School of Engineering of Bilbao, a degree in Physical Sciences at the Complutense University of Madrid and an M.Phil. in Theoretical Physics at the School of Mathematical and Physical Sciences of the University of Sussex (U.K.) His professional life has been devoted mainly to lecturing and research. Since 1983 he is Professor of Thermodynamics and Physical Chemistry at the School of Engineering of Bilbao, University of the Basque Country. He also worked for several years as Technical Director for an engineering company dedicated mainly to the development of power plant projects. His lines of research are energy analysis and the simulation of industrial equipment and processes, as well as energy efficiency in buildings. He has published more than one hundred articles in international journals, has presented communications in more than eighty international congresses, is the author of three patents and has written numerous technical reports and twelve books on thermodynamics and on cogeneration. Ana Picallo Perez, currently an interim university professor (at ETSI Bilbao) and a researcher at the consolidated ENEDI group, got the PhD in Energy Efficiency and Sustainability in Engineering and Architecture area in 01/2019 thanks to the Basque Government's predoctoral fellowship. In addition, she previously participated as a Personal Researcher Contracted by the School of Engineering of Bilbao. Her research areas are related to testing, analysis and optimization of building energy supply systems, Thermoeconomics and diagnosis application in buildings. Likewise, according to those areas, she made 6 publications in JCR journals, a book chapter and she contributed in more than 15 international and national congresses since 2015. She did 3 quarterly stays: first one at Technische Universität Berlin (2017), second at L'Università degli Studi di Palermo (2018) and third at L'Università degli Studi di Padova (2018) for deepening her PhD. Additionally, she attended 5th academic year of Mechanical Engineering at Politecnico di Torino (Italy, 2014).