Abstract
Advances in Energy Systems are recognized as a key element in establishing a well-developed sustainable society. At the same time, they are considered as a promising solution to optimize the drawbacks of energy-related impacts on the environment. Increasing the efficiency of energy systems through scrutinizing their operating principles and analyzing the performance of the involved components can also lead to energy economy goals. In this regard, there has been a need to establish an informative platform to exchange ideas, share information, and initiate collaboration, and the World Conference on Energy Science and Technology (TUBA WCEST-2021) was established to provide such opportunities and was organized by the Turkish Academy of Science on August 8–12, 2021. A total of 21 parallel sessions and panels were held during the conference about various topics in energy, and 122 presentations were made at the conference. At this unique event, there were 28 key speakers and 28 invited speakers from 35 different countries, consisting of leading researchers, executive managers and presidents of international institutions, and experts, with the participation of approximately 1500 people in total. Among the high-quality papers submitted and presented at the conference, the selected ones were invited to make the necessary editions in line with the guidelines of the Internarial Journal of Energy Research and to be submitted to a special issue entitled “Progress in Energy Systems.” Furthermore, there were other submissions related to the subject of the special issue to enrich the contents of the special issue. In closing, we would like to express our gratitude to the Wiley publishing staff, who have helped during the preparation and processing of the papers. We would also like to register our sincere appreciation to Prof. Ibrahim Dincer for his valuable help and coordination during all the steps of preparation and finalizing this special issue. We hope that this special issue will increase the knowledge of advanced energy systems and technologies.