高温供冷相变蓄冷材料的制备及蓄冷性能

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114.1 kJ/kg，蓄冷球蓄冷、释冷过程稳定，单球蓄冷总量为17.67 kJ，能够满足高温供冷空调系统的蓄冷需求.

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

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.