月桂酸-正辛酸低温相变材料的制备和循环性能  

Preparation and cycling performance of lauric acid-caprylic acid as cool storage phase change material

作　　者：章学来[1] 杨阳[1] 

机构地区：[1]上海海事大学蓄冷技术研究所,上海201306

出　　处：《化学工程》2013年第11期10-13,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(50976064)

摘　　要：相变材料在蓄冷空调系统中具有广阔的应用前景。文中利用步冷曲线法绘制了月桂酸-正辛酸溶液的相图,找到了月桂酸-正辛酸溶液的共融点,其质量比为21∶79。经差示扫描量热仪(DSC)测试得到相变温度为7.0℃,相变潜热130.8 kJ/kg,可以作为相变材料使用。对该相变材料进行充冷和放冷的实验后,用DSC测得其循环20次的相变温度为7.58℃,相变潜热为134.4 kJ/kg,循环到40次的相变温度为7.73℃,相变潜热为134.0 kJ/kg,循环稳定性能良好,适合作为蓄冷空调用低温相变材料。Phase change materials （PCMs）for cool storage air-conditioning is a promising technology. Using the cooling curve of PCM to draw the phase diagram and find the eutectic melting point of lauric acid-caprylic acid, the mass ratio of PCM is 21 ： 79. The differential scanning calorimetry （ DSC ） curve shows that the PCM melting temperature is 7. 0 ℃ and the latent heat is 130. 8 kJ/kg, and it can be used as PCM. The charging and discharging performance of the material was tested for 40 times. The DSC curve shows that at the 20th testing times, the PCM melting temperature is 7.58 ℃, the latent heat is 134.4 kJ/kg; at the 40th testing times, the PCM melting temperature is 7.73 ℃, latent heat is 134.0 kJ/kg. It has good steady performance for cycling and is suitable to be low-temperature phase change materials for cool storage air-conditioning.

关 键 词：蓄冷 相变材料 相变潜热 充放冷性能 

分 类 号：TB34[一般工业技术—材料科学与工程]