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纳米流体强化相变蓄冷特性的实验研究
引用本文:李新芳,朱冬生.纳米流体强化相变蓄冷特性的实验研究[J].材料导报,2009,23(6).
作者姓名:李新芳  朱冬生
作者单位:1. 中山火炬职业技术学院,中山,528436
2. 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广州,510641
基金项目:国家自然科学基金,教育部新世纪优秀人才支持计划,中国博士后科学基金 
摘    要:在水基液中添加少量的纳米Cu颗粒(平均粒径为25nm),经超声波振荡和添加分散剂后,制备成分散稳定的Cu-H2O纳米流体.实验研究了纳米颗粒添加剂对水过冷度的影响,并采用红外热摄仪在线观察了纳米流体结晶过程的温度分布.结果表明.在水基液中加入纳米Cu粒子后,其过冷度明显降低,且随着纳米Cu质量分数的增加,流体的结冰时间缩短.Cu-H2O纳米流体的相变温度比水的提高了1℃,因此,纳米流体蓄冰时可以降低压缩机的输入功率,从而节约成本、减少能耗.

关 键 词:Cu-H2O纳米流体  相变  蓄冷  过冷度

Experimental Study of Cold Storage Characteristics of Nanofluids as the Phase Change Material
LI Xinfang,ZHU Dongsheng.Experimental Study of Cold Storage Characteristics of Nanofluids as the Phase Change Material[J].Materials Review,2009,23(6).
Authors:LI Xinfang  ZHU Dongsheng
Affiliation:1 Zhongshan Torch Vocation and Technology College;Zhongshan 528436;2 Key Lab of Enhanced Heat Transferand Energy Conservation;the Ministry of Education;College of Chemistry and Chemical Engineering;South ChinaUniversity of Technology;Guangzhou 510641
Abstract:A spot of Cu nanoparticles (particle size 25nm) are added in the deionized water,through supersonic oscillating and addition of the dispersant,and the Cu-H2O nanofluids with better stability and evenness are prepared. The effect of nanoparticle agent on supercooling of the deionized water is experimentally studied in this paper,and the temperature distribution of the cold storage process is observed on line by using infrared heat camera. The results show that Cu-H2O nanofluids have remarkably lower super-co...
Keywords:Cu-H2O nanofluids  phase change  cold storage  supercooling  
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