| 低温相变蓄冷纳米流体成核过冷度的实验研究 |
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| 引用本文： | 何钦波,童明伟,刘玉东.低温相变蓄冷纳米流体成核过冷度的实验研究[J].制冷学报,2007,28(4):33-36. |
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| 作者姓名： | 何钦波 童明伟 刘玉东 |
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| 作者单位： | 1. 顺德职业技术学院,顺德,528300
2. 重庆大学动力工程学院,重庆,400030 |
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| 摘 要： | 在共晶盐BaCl2水溶液中添加亲水性分散剂，经过超声振动制备了粒径为20nm四种不同体积分数的TiO2-BaCl2-H2O纳米流体。对Baa2水溶液和纳米流体同步进行蓄冷实验，实验表明：加入纳米TiO2粉体后，可大幅度降低BaCl2水溶液的结晶成核过冷度，并且纳米流体的起始成核时间比BaCl2水溶液提前，结晶结束所花时间也要大大少于BaCl2水溶液。最后对纳米粒子影响基液的结晶机理进行了分析。
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| 关 键 词： | 热工学 纳米流体 相变蓄冷 过冷度 |
| 文章编号： | 0253-4339（2007）04-0033-04 |
| 修稿时间： | 2006-11-28 |
Experimental Study on Super-cooling Degree of Nanofluids for Cryogenic Cool Storage |
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| He Qinbo,Tong Mingwei,Liu Yudong.Experimental Study on Super-cooling Degree of Nanofluids for Cryogenic Cool Storage[J].Journal of Refrigeration,2007,28(4):33-36. |
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| Authors: | He Qinbo Tong Mingwei Liu Yudong |
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| Affiliation: | Shunde Polytechnic, Shunde, Guangdong,528300, China |
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| Abstract: | Four different concentration TiO2-BaCl2-H2O nanofluids with 20nm TiO2 were prepared by supersonic oscillator through adding hydrophilic dispersant into BaCl2 solution. BaCl2-H2O and TiO2-BaCl2-H2O nanofluids were tested experimentally. The results show that nanofluids have remarkably lower supercooling degree than BaCl2-H2O, and the beginning nucleation time of nanofluids is ahead of BaCl2-H2O. Moreover, their crystallization time is lower than that of BaCl2-H2O. Also, the crystallization mechanism was analyzed for the influence of the nano TiQ2 particles on BaCl2-H2O. |
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| Keywords: | TiO2 |
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