Fouad khaldi is Professor in Energy Engineering, since 2014, in the fields of Applied Thermodynamics, Combustion and Heat Transfer. Currently, his teaching and research activities are at Higher National School of Renewable Energies, Environment & Sustainable Development, Batna. He started his career in 2007 at the University of Batna 1. He received his PhD in Energy Engineering, in 2004, from the Grenoble Institute of Technology, France. His main area of research is the design and optimization of energy systems, i.e. solar and thermal power plants, solar heat pumps, thermal engines.