Nelson Martins is an associate professor at the Mechanical Engineering Department of Aveiro University (UA). He obtained a PhD in Mechanical Engineering/Applied Thermodynamics from IST (Technical University of Lisbon), Portugal. Since 1999, he has been teaching energy-related subjects at UA's Mechanical Engineering Department, particularly in the fields of Heating, Ventilation, Air Conditioning, and Refrigeration with Energy Management. He was one of the founders and the first director of the Master's in Sustainable Energy Systems, the postgraduate course in Energy Efficiency and Renewable Energies, and the Doctoral Program in Energy Systems and Climate Change. Currently, he is the director of the Doctoral Program in Energy Systems and Climate Change. Nelson is also a founding member of giSES, a research group at Sustainable Systems of Energy. His research interests include Sustainable Energy Systems, Experimental Heat Transfer, Flow Simulation in Microchannels (CFD), Nanofluid Development and Characterisation, and Monitoring and Diagnostic Processes in Energy Systems, especially in industry and buildings. Additionally, he is a member of several organizations, including TEMA (the Centre for Mechanical Technology and Automation), LASI (theIntelligent Systems Associated Laboratory), the Portuguese Engineers' Society (Senior Member), the Portuguese Society of Metrology, the Portuguese Society of Qualified Experts, and the International Association of Energy Engineers.