石蜡乳状液纳米流体相变换热的研究  

Study on the Phase Change Heat of Paraffin Emulsion Nanofluid

作　　者：宗美林 叶晓江[1,2] 廖光伟 侯志坚[3] ZONG Mei-lin;YE Xiao-jiang;LIAO Guang-wei;HOU Zhi-jian(School of Optical Information and Energy Engineering,Wuhan Institute of Technology,Wuhan 434200,China;School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 4300743,China;School of Mechanical and Electrical Engineering,Shenzhen Polytechnic,Shenzhen 518055,China)

机构地区：[1]武汉工程大学光电信息与能源工程学院,武汉434200 [2]华中科技大学材料科学与工程学院,武汉430074 [3]深圳职业技术学院机电学院,深圳518055

出　　处：《武汉理工大学学报》2020年第7期14-19,共6页Journal of Wuhan University of Technology

基　　金：湖北省教育厅重点项目(D20111505).

摘　　要：通过剂在油中法和两步法分别制备了W/O(水包油)乳状液、碳纳米管(MWCNTs)乳状液纳米流体、Al_(2)O_(3)乳状液纳米流体。研究了乳状液纳米流体的稳定性、过冷度及相变蓄能特性的影响因素。结果表明,添加O-10乳化剂可制得稳定性好且常温下为液态的石蜡乳状液,以石蜡乳状液为基液制备的乳状纳米流体具有较好分散稳定性,且具有固定的融点;与基液相比乳状液纳米流体可以有效地降低过冷度,缩短相变换热时间的起始时间;在乳状液纳米流体相变过程中,碳纳米管(MWCNTs)乳状液纳米流体的相变换热特性优于Al_(2)O_(3)乳状液纳米流体;浓度为0.6%碳纳米管乳状液纳米流体,其过冷度较小,相变换热时间较短,具有较低的融化相变温度,其作为相变储能材料具有较好的应用价值。W/O(oil-in-water)emulsion,carbon nanotube(MWCNTs)emulsion nanofluid,and Al_(2)O_(3) emulsion nanofluid were prepared respectively by the agent-in-oil method and the two-step method.The influencing factors of the stability,subcooling degree and phase change energy storage characteristics of the emulsion nanofluid were experimentally studied.The experimental studies show that the addition of O-10 emulsifier can produce good stability of liquid paraffin emulsion at room temperature.The emulsion nanofluid prepared with the paraffin emulsion as the base fluid has good dispersion stability and a fixed melting point.Compared with the base fluid,the emulsion nanofluid can effectively reduce the supercooling degree and shorten the starting time of the phase change heat time.In the phase transition process of the emulsion nanofluid,the phase transition heat characteristics of the carbon nanotube(MWCNTs)emulsion nanofluid are better than that of the Al_(2)O_(3) emulsion nanofluid.The carbon nanotube emulsion nanofluid with a concentration of 0.6%has a low degree of supercooling,a short phase-change heat time,and a low melting phase-change temperature.It has good application value as a phase-change energy storage material.

关 键 词：相变储能 纳米流体 相变换热 过冷度 步冷曲线 

分 类 号：TB383[一般工业技术—材料科学与工程]