三水合醋酸钠相变储能性能研究

Study of Phase Change Property of Sodium Acetate Trihydrate as Energy Storage Material

三水醋酸钠(CH_3COONa·3H_2O)由于其潜热较高而常作为相变储能材料被众多学者研究,而其适宜的熔点使其能适用于家用热水储能系统等。然而,三水舍醋酸钠在相变过程中存在严重的过冷和相分离问题。以三水合醋酸钠作为相变基体材料,着重研究添加成核剂、增稠剂后体系在反复热循环过程中的相变储能性能。

Sodium acetate trihydrate （CH3COONa·3H2O） has been studied as PCM by many researchers because of its large latent heat of fusion which makes it attractive as a latent heat storage material. Its melting temperature makes it suitable for applications such as solar energy storage for domestic hot water. However, there are two main problems about （CH3COONa·3H2O） which are supercooling and phase segregation during the phase change. This paper studies mainly about the energy storage property of （CH3COONa·3H2O） with the addition of nucleating agents and thickeners under continuous melting and thawing.