癸酸-月桂酸二元复合相变储能材料循环热稳定性

Thermal Stability of Binary Multiple Decanoic Acid-Lauric Acid as Phase Change Material

以研究癸酸—月桂酸二元复合相变储能材料在循环相变过程中的热稳定性为目的,搭建了实现相变材料加速热循环过程的实验平台,并利用差示扫描量热仪(DSC)测定了经过0,800,1 600,2 400,3 200,4 000次加速热循环后相变材料的相变温度和相变潜热。经过4 000次循环后,相变温度下降了0.8℃,相变潜热降低为初始值的92.08%。结果表明:随着循环次数的增加,该相变材料的相变温度变化微小,相变潜热有所降低,其热稳定性比较好。基于实验结果,讨论了此种相变材料在太阳能及建筑节能领域的应用前景。

For researching thermal stability of binary multiple decanoic acid-laurie acid phase change material （PCM）. Accelerated thermal cycle experiment device was designed and built. The temperatures and latent heats of phase change for the PCM after 0,800, 1 600, 2 400, 3 200 and 4 000 accelerated thermal cycles were measured by differential scanning calorimetry （DSC）. After 4 000 accelerated thermal cycles, the phase change temperature dropped 0. 8 ℃ , and the latent heat was 92.08% of the original value. The test results indicate that the thermal stability of PCM is good. It can be wildly used in solar energy and building energy saving.