低温相变纳米流体蓄冷特性研究
Experimental study on characteristics of lowtemperature phase change cool storage for nanofluids
摘要：
在低温共晶盐BaCl2水溶液中悬浮少量的纳米TiO2颗粒（粒径20 nm），经过超声波振荡，制备成体积分数为113% 的TiO2-BaCl2-H2O纳米流体。对BaCl2溶液和TiO2-BaCl2-H2O纳米流体的蓄冷特性进行了实验比较。结果表明，加入纳米TiO2粉体后，可降低BaCl2溶液的过冷度；在同样时间内，纳米流体的蓄冷量要大于BaCl2溶液。
关键词：纳米流体 低温相变蓄冷 过冷度 TiO2 BaCl2溶液
Abstract：
Suspending a spot of TiO2 nanoparticles(particle size 20 nm) in low temperature BaCl2 solution, through supersonic oscillating, prepares the TiO2-BaCl2-H2O nanofluid with volume fraction of 113%．Compares the nanofluid and BaCl2 solution in cool storage characteristics by the experiments. The results show that the nanofluid has remarkably lower supercooling degree, and that the cool storage capacity of the nanofluid is larger than that of BaCl2 solution during the same time.
Keywords:nanofluid, lowtemperature phase change cool storage, supercooling degree, TiO2, BaCl2 solution