摘要
三水醋酸钠(CH3COONa.3H2O)由于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,三水合醋酸钠在相变过程中存在着严重的过冷和相分离的问题。本文以三水合醋酸钠作为相变基体材料,经研究、比较分别以羧甲基纤维素、明胶作为增稠剂,添加各种成核剂后的各体系的相变储能性能,从而得出羧甲基纤维素比明胶作为该体系的增稠剂的效果好得多,Na2SiO3.9H2O、Na2B4O7.10H2O的成核效果较好。
Sodium acetate trihydrate（CH3COONa·3H20）has been fooased as a phase change material 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 applica- tions in such as solar energy storage for domestic hot water. However,two main problems with CH3COONa·3H20 are super- cooling and phase segregation. Through study and comparing the energy storage property of CH3COONa·3H20 with different additives of nucleating agents and thickeners under continuously melting and thawing, it is found that carboxy methyl cellulose is better than gelatin as a thickener for CH3COONa·3H20, while Na2SiO3·9H2O and Na2B4O7·10HaO as nucleating agents for CH3COONa·3H20 is good.
出处
《材料开发与应用》
CAS
2007年第6期24-27,共4页
Development and Application of Materials
基金
广东省科技计划项目"储能式黑液太阳能集热系统的关键技术研究"(编号:2006B13201001)
关键词
三水醋酸钠
相变材料
过冷
储能性能
Sodium acetate trihydrate
Phase change material
Supercooling
Energy storage property
