摘要：【中文摘要】 在水介質中懸浮少量的納米氧化鋁顆粒(粒徑20nm),通過添加分散劑和超聲波振蕩,制備成均勻分散的Al2O3-H2O納米流體。對水和Al2O3-H2O納米流體的相變蓄冷特性進行了實驗比較。結果表明,加入納米Al2O3可降低水的過冷度,縮短結冰時間;在相同的時間內,納米流體的蓄冷量要大于純水。 【英文摘要】 Al2O3-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. 【中文關鍵詞】 工程熱物理; Al2O3-H2O納米流體; 過冷度; 相變蓄冷【英文關鍵詞】 Engineering thermophysics; Al2O3-H2O nanofluids; subcooling degree; phase-change cold storage