Energy Storage Science and Technology

   

Research progress on high-temperature flue gas heating solid particle thermal energy storage technology

Mingjuan GAO1,2(), Guoliang SONG1,2(), Weijian SONG1, Jingzhang LIU1   

  1. 1.State Key Laboratory of Coal Conversion, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, Beijing, China
    2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, Beijing, China
  • Received:2025-10-22 Revised:2025-11-13 Online:2025-11-17
  • Contact: Guoliang SONG E-mail:gaomingjuan@iet.cn;songgl@iet.cn

Abstract:

China possesses abundant industrial waste heat resources, yet utilization rates remain relatively low. Thermal energy storage (TES) technologies, by decoupling heat sources from utilization/conversion processes, have become a key method for enhancing waste heat recovery efficiency. Solid particle thermal energy storage, with its advantage of high-temperature adaptability, strong cycle stability, is widely used in TES systems and demonstrates particular competitiveness in high-temperature flue gas heating applications. Based on a review of recent domestic and international literature, this study focuses on thermal storage technologies utilizing high-temperature flue gas as the heat source and solid particles as the storage medium. First, it discusses the sources and utilization methods of industrial waste heat, analyzes the principles of solid particle thermal storage heated by high-temperature flue gas, and proposes system evaluation metrics. Second, it reviews research progress in solid particle thermal storage heated by high-temperature flue gas, covering material selection and performance characterization, as well as design approaches for storage devices (including packed beds, moving beds, and fluidized beds) with their respective advantages, disadvantages, and applicable scenarios. Relevant domestic and international application practices are summarized. Third, it thoroughly analyzes challenges in practical implementation, such as enhancing heat transfer efficiency, reducing particle wear and ash accumulation, and optimizing system control. Finally, it highlights potential future research directions in novel heat storage material research and development, heat transfer structure optimization, and the integration of intelligent control technologies. This review aims to provide theoretical foundations and technical support for advancing industrial waste heat utilization technologies and facilitating the low-carbon transformation of energy systems.

Key words: high-temperature flue gas, solid particle thermal energy storage, sensible heat storage, waste heat recovery

CLC Number: