高温供冷相变蓄冷材料的制备及蓄冷性能  

Preparation and Performance of Cold Storage Phase Change Material for High Temperature Cooling Application

作　　者：王晓霖[1] 翟晓强[1] 王恬[1] 席丽霞[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2013年第8期1275-1281,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(51276114)

摘　　要：对高温供冷用相变蓄冷材料进行配制,并对其热物性及蓄\释冷性能进行分析.分析测试了癸酸-月桂酸二元体系的低共熔点,以及不同种类添加剂的摩尔分数对体系相变特性的影响.建立蓄冷球模型,对蓄\释冷过程中材料温度、蓄\释冷量、蓄\释冷速率的变化规律进行分析;使用自制相变材料灌装蓄冷球,进行蓄冷、释冷性能实验.结果表明:以摩尔比例70∶30的癸酸、月桂酸混合物为基液,摩尔分数0.08的油酸为添加剂,制备出蓄冷材料的相变温度约15℃,相变潜热为114.1kJ/kg,蓄冷球蓄冷、释冷过程稳定,单球蓄冷总量为17.67kJ,能够满足高温供冷空调系统的蓄冷需求.A cold storage phase change material was prepared for high temperature cooling application. Its thermophysical properties and charging/discharging performance were investigated. The eutectic point and the influence of mole fraction of different additives on phase change characteristics of the capric-lauric system were tested. The mathematical model of a package ball was built, through which the variation of temperature, storage capacity and storage rate were analyzed. Experiments were conducted to study the charging/discharging performance of the package ball. The results show that the capric-lauric acid combination （mole proportion is 70 ： 30） adding oleic （mole fraction is 0.08） is considered to be well suited to high temperature cooling application with a phase change temperature of 15℃ and a latent heat of 114.1 kJ/kg. The charging and discharging processes are stable with a storage capacity of 17.67 kJ for each ball.

关 键 词：高温供冷 癸酸-月桂酸 相变蓄冷 蓄冷球模型 

分 类 号：TB64[一般工业技术—制冷工程]