Guest Editors
Prof. Dongran Song
Email: humble_szy@163.com
Affiliation: School of Automation, Central South University, Changsha, 410083, China
Homepage:
Research Interests: wind power generation, photovoltaic power generation and other new energy generation technologies, artificial intelligence methods and their applications in new energy systems

Dr. Antun Pfeifer
Email: antun.pfeifer@fsb.unizg.hr
Affiliation: Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, 10002, Croatia
Homepage:
Research Interests: renewable energy, energy engineering, energy conversion

Prof. Mohamed Talaat Mohamed Moustafa
Email: mtalaat@ecu.edu.eg
Affiliation: Department of Electrical Power and Machines, Zagazig University, Zagazig, 44519, Egypt
Homepage:
Research Interests: renewable energy integration techniques, energy conversion (solar-wind-wave energies) to electrical power generation, artificial intelligence applications in power systems, IoT and hybrid cloud-based data processing for power system monitoring in smart and microgrids

Summary
In the last few decades, the integration and improvement in the energy efficiency of several sectors regarding electricity, heating, cooling, transport, water, buildings, waste, wastewater, industry, forestry and agriculture systems have become more and more pivotal. Considering the importance of a social system based on the sustainability concept and the efforts made to reduce greenhouse gas emissions, the SDEWES Conferences have become a significant platform for researchers in those areas to meet, discuss, share and disseminate new ideas.
The 20th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES) is dedicated to the advancement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from the use of natural resources and by a transition to a knowledge-based economy. All taking into account the economic, environmental and social pillars of sustainable development.
This Special Issue aims to provide an important contribution by presenting the state of the art in sustainable energy supply solutions, ranging from the technical analyses of energy components on both the supply and demand sides to energy scenarios and pathways. This Special Issue particularly welcomes SDEWES papers that address energy systems without traditional sector boundaries between electricity, heating, cooling, transportation and industrial demands and that consider the integration and synergies between these sectors.
Keywords
waste to energy, smart energy systems, energy policy, water–energy nexus, renewable energy resources for power and heat generation, district heating and/or cooling, advanced sustainable energy conversion and storage systems, biofuels and alternative fuels, hybrid and electric vehicles, cogeneration, trigeneration and polygeneration, electricity transmission and distribution, security of gas supply, energy efficiency in industry and building