Dear Colleagues,

In our world where energy consumption is increasing rapidly, the interest in clean energy systems is increasing day by day. Optimization of energy systems is of great importance while carrying out these studies. Many studies are carried out in order to reduce environmental pollution and establish efficient energy systems. Various studies are carried out in order to realize clean energy systems both in universities and research centers.

In this special issue, we aim to publish the scientific activities carried out by researchers around the world. In particular, emissions, environmental pollution, numerical and experimental studies, as well as different energy systems, clean combustion, and new technological studies for the storage of fuels, new types of fuel that have attracted attention recently, many similar topics will be published in this special issue.

Prof. Dr. Hasan Koten

Prof. Dr. Mohamed M. Awad

Guest Editors