关键词: 共晶, 相变, 相变材料, 复合材料, 理论设计, 储能

Abstract:

The development of energy-saving technology is a very practical problem nowadays. One of the development directions of these technologies is the storage of heat energy in various industries. Phase change materials （PCMs） are widely used in latent thermal energy storage system and thermal management system due to their large latent heat and constant temperature. However, the phase transition temperature and latent heat of a single phase change material are relatively fixed, and it is difficult to meet the requirements of various latent heat and phase transition temperatures for various energy storage applications. Therefore, people have carried out research on binary or multi-element eutectic phase transition systems. In this paper, the research progress of (quasi-)eutectic PCMs and their composites materials in recent years is introduced. The theoretical design mechanism of (quasi-)eutectic PCMs is discussed. The different problems existing in (quasi-)eutectic PCMs are pointed out, and corresponding strategies are put forward. Finally, the limitations of (quasi-)eutectic PCMs in practical applications are pointed out. In the future, it is necessary to further explore the search for new PCMs, the establishment of heat transfer theoretical models, the mechanical properties and aging resistance of (quasi-)eutectic phase change composites, and the low storage density and poor durability under high temperature conditions.

Key words: eutectic, phase change, phase change materials (PCMs), composites, theoretical design, energy storage