Authors：Jiancheng Yu1，Dan Wang2，Cheng Yao1，Peiyu Chen1， Bo Liu2
Institution ：1.State Grid Tianjin Electric Power Company, Hebei District, Tianjin 300010, P.R. China；2.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Nankai District, Tianjin 300072, P.R. China
Acknowledgements：This work was supported by the State Grid Corporation of China project: “Study on Multi-source and Multi-load Coordination and Optimization Technology Considering Desalination of Sea Water “(SGTJDK00DWJS1800011).
received a Ph.D. degree from Tianjin University, Tianjin, China, in 2006 and he is currently working for the State Grid Tianjin Electric Power Company. His research interests include the energy internet, intelligent power generation technology, and demonstration project construction.
received a Ph.D. degree from Tianjin University, Tianjin, China, in 2009 and became an Associate Professor at Tianjin University in 2015. His research interests include integrated energy systems, distributed generation systems, microgrid modeling and simulation, demand-side management, and power system stability analysis.
received a master degree from North China Electric Power University, Beijing, in 2017 and he is currently working for the State Grid Tianjin Electric Power Company. His research interests include the energy internet, intelligent power generation technology, and demonstration project construction.
received a master degree from North China Electric Power University, Beijing, in 2007 and he is currently working for the Electric Power Research Institute of the State Grid Tianjin Electric Power Company. His research interests include power system analysis and renewable energy.
received a bachelor degree from the School of Mechano-Electronic Engineering at Xidian University, Shaanxi, China, and he is now a graduate student at Tianjin University. His research interests include P2P energy transactions in microgrids.
Planning and design of a micro energy network for seawater desalination and regional energy interconnection
With the rapid development of the economy, the continuously increasing population, and ongoing climate change, the shortage of freshwater resources has become an increasingly important global problem. Seawater desalination technology can effectively alleviate the pressure on freshwater supplies and has been investigated in many countries. However, the majority of existing projects focus on the research and development of desalination equipment and the use of new technologies and pay less attention to the operation optimization of the desalination process. The micro energy network (MEN) designed in this study is an efficient distributed energy supply system that can be used to simultaneously supply electricity, cooling, heating, and freshwater as photovoltaic power, wind power, combined heat and power (CHP), electric cooling and heating, and a seawater desalination device are integrated into the MEN. In this study, a model for operation optimization of a MEN for seawater desalination was developed and the influences of the electric cooling and heating ratios and the operation optimization of the seawater desalination device were studied with the aim of minimizing the life cycle cost. Based on the results of this study, MENs can reduce the operation cost of desalination devices and improve the efficiency of renewable energy sources.
Seawater desalination, Micro energy network, Operation optimization, Life cycle cost.
Fig.1 Proportion of seawater desalination capacity and location of desalination projects around the world 
Fig.2 Schematic diagrams of seawater desalination plants using the (a) thermal and (b) membrane methods
Fig.3 Schematic diagram of a seawater desalination plant
Fig.4 Three-day dataset of solar radiation and wind speed
Fig.5 Three-day dataset of the electricity, heating, and cooling loads
Fig.6 Life cycle cost of the six scenarios
Fig.7 Photovoltaic power data from the operation optimization model of the MEN for seawater desalination
Fig.8 Wind power data from the operation optimization
model of the MEN for seawater desalination
Fig.9 Comparison of purchased energy consumption when a combination of renewable and non-renewable energy (yellow) and only non-renewable energy (blue) were used