外场调控混合纳米相变材料传热储热实验研究  

Experimental Study on Heat Transfer and Energy Storage Performances of Hybrid Nano-enhanced Phase Change Material Regulated by External Fields

作　　者：李和鑫 江秋怡 庄依杰 LI Hexin;JIANG Qiuyi;ZHUANG Yijie(Department of Safety Engineering,School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学环境科学与工程学院安全工程系,广州510006

出　　处：《工程热物理学报》2025年第4期1323-1328,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年基金项目(No.52006039)。

摘　　要：针对磁场调控相变过程系统循环性能降低的问题,本文通过红外热像仪与能谱分析(EDS)研究了超声空化效应、声流效应与磁场效应耦合作用对磁性(Fe_(3)O_(4))与非磁性(Al_(2)O_(3))混合纳米相变储热系统性能的影响。结果表明:空化效应与声流效应强化传热过程,随着超声功率的增加,效果越明显,超声功率为48 W时,熔化时间减少74%,储热效率提升1.91倍;磁场促进混合纳米增强相变材料前、中期的熔化,但抑制固相收缩阶段;16 W超声场与磁场耦合效应会较大影响传热机制,与施加16 W超声场相比传热性能变化较小,其熔化时间减少52%,储热效率提升1.72倍。In response to the reduction of the recycle performance of phase change energy storage system regulated by magnetic field,this paper investigates the coupled influence of ultrasonic cavi-tation effect,acoustic flow effect and magnetic effect on the performance of magnetic(Fe_(3)O_(4))and non-magnetic(Al_(2)O_(3))hybrid nano-enhanced phase change energy storage system through infrared thermography and energy dispersive spectrometer(EDS).The results show that cavitation effect and acoustic flow effect intensify the heat transfer process,the greater the power,the more noticeable the enhancement,the melting time is reduced by 74%and energy storage efficiency is improved by 1.91 times for 48 W case.Magnetic field promotes melting in the first and middle stages,but inhibits“shrinking solid”regime.The coupled effect of 16 W ultrasonic field and magnetic field could greatly alter heat transfer mechanism,with a very limited change in heat transfer performance compared to 16 W ultrasonic field case,which reduces melting time by 52%and improves energy storage efficiency by 1.72 times.

关 键 词：超声场耦合磁场 混合纳米增强相变材料 传热储热性能 空化效应 磁场效应 

分 类 号：TK511[动力工程及工程热物理—热能工程]