相变材料三水醋酸钠储热性能实验研究  

Experimental study on heat storage performance of sodium acetate trihydrate as phase change material

作　　者：王智平[1,2] 郭长华[1] 王克振[2] 彭国伟[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学可再生能源研究院,甘肃兰州730050

出　　处：《化学工程》2011年第5期27-30,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(10964004);2010年甘肃省科技支撑计划项目资助(1011GKCA026)

摘　　要：以三水醋酸钠(CH3COONa.3H2O)为相变储热基材,添加各种不同成核剂和增稠剂,比较它们的效果,寻求储热性能优越的组合配方。实验表明:对于同一成核剂,随添加量的增加,CH3COONa.3H2O的过冷度有增大的倾向。在10 g CH3COONa.3H2O中添加0.05 g的Na2HPO4.12H2O,抑制过冷的效果最好,同时配合0.3 g羧甲基纤维素(CMC)使用,CH3COONa.3H2O的过冷性能得到进一步改善,过冷度可降低至2.015℃,并且还能有效地防止相分层。同时,还发现CH3COONa.3H2O体系的恒温温度为65℃比较合适。Sodium acetate trihydrate（CH3COONa·3H2O） was used as a substrate material of phase change heat storage by adding various nucleating agents and thickeners to compare its effect so that to find out the best combination for superior heat storage performance.The experiments show that for the same type of nucleating agent,the degree of supercooling of CH3COONa·3H2O has an increasing tendency with the increasing of its adding amount.The effect of inhibiting supercooling is the best when adding 0.05 g Na2HPO4·12H2O in 10 g CH3COONa·3H2O.The supercooling performance of CH3COONa·3H2O can be further improved with 0.3 g carboxymethyl cellulose（CMC）,and the degree of supercooling can be reduced to 2.015 ℃.It can effectively prevent phase stratification.The experiment also shows that 65 ℃ is suitable as the constant temperature of CH3COONa·3H2O system.

关 键 词：三水醋酸钠 相变储热材料 储热体系 过冷 相分层 

分 类 号：TB34[一般工业技术—材料科学与工程]