化工学报2025，Vol.76Issue(4)：1863-1874,12.DOI:10.11949/0438-1157.20240935
多熔点相变乳液的制备及性能强化研究
Preparation and heat transfer enhancement of phase change slurry with multi-phase change temperature
摘要
Abstract
A phase change emulsions is termed as a latent heat functional thermal fluid,which can not only maintain the fluidity of a conventional heat transfer fluid,but also have the latent heat storage capacity of phase change material.It is believed that the phase change slurry enables to enhance the heat transfer rate of a conventional heat transfer fluid,expanding the potential application fields and improving energy utilization efficiency.Two organic phase change materials were selected to prepare multi-melting point phase change emulsion,and its heat transfer was enhanced.Morphology,physical and chemical properties and thermophysical properties of phase change slurry were analyzed in detail.The results indicate that the obtained phase change slurry are milky white colloidal system at room temperature with average particle size range of 129.3-204.4 nm and excellent fluidity and stability.Multi-phase change temperatures appear in the phase change process,and the latent heat is in the range of 27.49-34.54 J/kg.Moreover,the solid specific heat and liquid specific heat range from 2.98 to 3.83 J/(g·K),and from 2.26 to 2.93 J/(g·K).Thermal conductivity of phase change slurry is between 0.42 and 0.47 W/(m·K),and 0.5%(mass)nano-Si3 N4 can increase the thermal conductivity of slurry by 6.0%—13.5%.The enhanced phase change slurry can be used as an excellent heat exchange working medium in the field of cooling.关键词
相变乳液/多熔点/热物性能/热稳定性/强化传热Key words
phase change slurry/multiple-phase change temperature/thermal properties/thermal stability/heat transfer enhancement分类
能源科技引用本文复制引用
范佳媛,曾文慧,任志超,张文涛,吕霜..多熔点相变乳液的制备及性能强化研究[J].化工学报,2025,76(4):1863-1874,12.基金项目
国网四川省电力公司科技项目(521996220002) （521996220002）
