对太阳能空调的储/输冷系统中相变材料的热物性

关键字：太阳能,空调,输冷系统,相变

（四川大学 建筑与环境学院，四川 成都  610065）
 

    摘要：采用瞬态热线源测量技术对相变温度为18 ℃的微胶囊相变材料悬浮液（MEPCMs）以及相变材料悬浮液（PCMs）的导热系数进行了测试，分析了温度和浓度对二者导热性能的影响，并且对2种相变材料进行DSC分析得到2种材料相变潜热。结果表明，这2种相变材料的导热系数随温度升高呈现先增大后降低的趋势，并且随浓度的降低而增大。将2种材料的热物性能进行了比较，可以得到微胶囊化后的相变材料具有更好的热物性能，能够提高太阳能空调系统的运行效率以及稳定性。
    关键词：微胶囊相变材料；空调系统；热物性
    中图分类号：TU832.1+7       文献标识码：A        文章编号：1001-702X（2017）08-0058-05

Performance test and optimization of PCM based on solar powered air conditioning cold store/transport system
ZHENG Lin，ZHANG Wei，LIANG Fei
（College of Architecture and Environment，Sichuan University，Chengdu 610065，China）

    Abstract：This article experimented the thermal conductivity of micro phase change materials suspension（MEPCMs） and open phase change materials suspension（PCMs） with 18 ℃ phase transition temperature by transient hot wire source measurement technology，analyzed the influence of temperature and concentration on the thermal conductivity，and analyzed the two phase change materials with DCS tester to obtain the latent heat capacity. The results show that the thermal conductivity of these two phase change materials suspension will firstly increase then decrease with ascendant temperature and it will increase with the decrease of the concentration. The thermophsyical properties of these two phase change materials are compared, the result shows that the microencapsulated phase change materials have better thermophysical properties，capable to increase the running efficiency and stability of the solar powered air conditioning system.
    Key words：microencapsulated phase change materials，air conditioning system，thermophysical properties