空调用纳米复合相变蓄冷材料导热性能的研究

Study on heat transfer properties with phase change nanocomposites in air-conditioning system

对比分析了水蓄冷、冰蓄冷、共晶盐蓄冷及气体水合物蓄冷技术的优缺点,提出在常规空调中采用纳米复合材料相变蓄冷技术,针对目前空调用有机相变蓄冷材料普遍存在导热系数低、传热性能差的缺点,采用在其中添加纳米颗粒来改善介质的导热性能,对其导热性能进行了实验研究.结果表明:加入纳米TiO2颗粒后,有效地提高了有机相变蓄冷材料的导热系数.

In this paper, the advantages and disadvantages of water cool storage, ice cool storage, euteetic salt cool storage and hydrate cool storage technologies are compared and analyzed. The cool storage technology with phase change nanocomposites used in conventional air-conditioning system is presented, and the experimental study on phase change temperature and degree of super cooling are carried out. The results indicate the heat transfer coeffi- cient of the organic phase change cool storage materials could be decreased by adding nanometer TiO2.