Introduction
Masood Ebrahimi received his B.Sc. in mechanical engineering and his PhD in energy conversion both from the K. N. Toosi University of Technology, Iran. He received his MSc in mechanical engineering, energy conversion from the Iran University of Science and Technology (IUST). My main concern is the environmental pollution and global warming due to inappropriate usage of energy systems. Because of that my main research interest is to design and optimize energy systems by using 4E (energy, exergy, economic and environmental) analyses. I am also interested in multi-criteria decision-making techniques for energy systems.