Al_2O_3-H_2O纳米流体相变蓄冷特性研究  

Study on Phase-change Cold Storage Characteristics of Al_2O_3-H_2O Nanofluids

作　　者：杨硕[1] 朱冬生[1] 吴淑英[1] 李华[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室,广州510641

出　　处：《制冷学报》2010年第1期23-26,共4页Journal of Refrigeration

基　　金：国家自然科学基金(20346001);教育部新世纪优秀人才支持计划资助项目(NCET-04-0826)~~

摘　　要：在水介质中悬浮少量的纳米氧化铝颗粒(粒径20nm),通过添加分散剂和超声波振荡,制备成均匀分散的Al2O3-H2O纳米流体。对水和Al2O3-H2O纳米流体的相变蓄冷特性进行了实验比较。结果表明,加入纳米Al2O3可降低水的过冷度,缩短结冰时间;在相同的时间内,纳米流体的蓄冷量要大于纯水。Al2O-H2O nanofluids with uniform dispersancy were prepared in which a spot of Al2O3 nanoparticles with a particle size of 20nm suspended in water and the dispersant and supersonic oscillating were added. The cold storage characteristics of the nanofluids and water were experimentally compared. The results show that the nanoparticles in water reduced the subcooling degree of water and the freezing time, and the cold storage capacity of the nanofluids was larger than that of water for the same time.

关 键 词：工程热物理 Al2O3-H2O纳米流体 过冷度 相变蓄冷 

分 类 号：TB611[一般工业技术—制冷工程] TQ027.3[化学工程]