Thermal energy storage using composite phase change materials with molten salt particles encapsulated/ceramic composite by sol-gel method

ABSTRACT

In this paper, a new molten salt/ceramic composite phase change thermal storage material was prepared by sol-gel method and powder compacting method. The surface of molten salt particles was encapsulated with SiO₂ or TiO₂ by sol-gel method, then the molten salt particles were combined with MgO to prepare composite phase change thermal storage materials. By this method, the density of the composite increased by 8.74%, the thermal conductivity increased by 16.27%, after high-temperature heat. The decline of the heat loss rate was only 2.67%.

KEYWORDS:

• Phase change materials
• sol-gel method
• TiO₂
• SiO₂
• Magnesium Oxide

Additional information

Funding

The work was supported by the technology projects of state grid corporation of China. (The key technologies for improving thermophysical properties of high temperature phase change heat storage materials, No. SGGR0000DLJS1800085)

Notes on contributors

Gaoqun Zhang

Gaoqun Zhang received the Ph.D. degree in School of Electronic and Information Engineering from Xi’an Jiaotong University, Xi’an, China, in 2017. She is now a postdoctoral fellow at Global Energy Interconnection Research Institute Co., Ltd., Beijing, China. Her main research interests include heat storage materials, electronic materials and ceramic materials.

Zhanfeng Deng

Zhanfeng Deng director of the Institute of power electronics in Global Energy Interconnection Research Institute Co., Ltd., Beijing, China. His main research interests include energy storage materials, energy storage system and power electronics technology theory.

Yunkun Lu

Yunkun Lu received the B.S. degree in School of Mechanical and Materials Engineering from North China University of Technology, Beijing, China, in 2013. he is currently pursuing the Ph.D. degree in Material Science and Engineering at the Institute for Advanced Materials and Technology, University of Science and Technology Beijing in Beijing, China. His research interests include composite phase change heat storage materials, ceramic powder materials and glass materials.

Junjie Hao

Junjie Hao received the B.S. and Ph.D. degrees from the School of materials science and Engineering, Tianjin University, Tianjin, China, in 1987 and 2002, respectively. He is currently a Professor with the School of Institute for Advanced Materials and Technology, University of Science and Technology Beijing. His main research interests include Functional ceramics, powder metallurgy and superhard materials.

Zhongkai Ren

Zhongkai Ren received the B.S. degree in Materials Science and Engineering from Central South University, Tianjin, China, in 2017. he is currently pursuing the M.S. degree in Material Science and Engineering at the Institute for Advanced Materials and Technology, University of Science and Technology Beijing in Beijing,He research interest includes composite phase change heat storage materials, ceramic powder materials and glass materials.

Cenyu Yang

Cenyu Yang received the Ph.D. degree in Chinese Academy of Sciences, Beijing China, in 2012. She has been working as at Global Energy Interconnection Research Institute Co., Ltd., Beijing, China. Her main research interests include heat storage materials, thermal energy storage system.

Guizhi Xu

Guizhi Xu deputy director of the Institute ofpower electronics in Global Energy Interconnection Research Institute Co., Ltd., Beijing, China. Her main research interests include energy storage materials and energy storage system.

Tianhao Wang

Tianhao Wang received the degree of master of science in Electrical Engineering from Drexel University, Philadelphia, U.S. in 2014. After graduation, he is currently a power system analysis researcher in State Grid Tianjin Electric Power Research Institute from SGCC. His research interests include energy storage system, power system analysis and power system stability.