磁场对Fe3O4⁃水纳米流体传热特性的影响

doi:10.3969/j.issn.1672-6952.2020.02.005

辽宁石油化工大学学报 ›› 2020, Vol. 40 ›› Issue (2): 22-29.DOI: 10.3969/j.issn.1672-6952.2020.02.005

磁场对Fe₃O₄⁃水纳米流体传热特性的影响

翟郑佳，李国龙，朱恒宣，杨历，王进

河北工业大学能源与环境工程学院，天津 300400

收稿日期:2019-05-02 修回日期:2019-08-09 出版日期:2020-04-28 发布日期:2020-05-22
通讯作者: 王进（1982⁃），男，博士，副教授，从事强化传热传质技术研究；E⁃mail：wjwcn00@163.com。
作者简介:翟郑佳（1994-），女，硕士研究生，从事纳米流体强化传热研究；E-mail：jia920611327@163.com。
基金资助:
国家自然科学基金项目（51576059）；河北省研究生创新资助项目（CXZZSS2019012）。

Effect of Magnetic Field on Heat Transfer Characteristics of Fe₃O₄⁃Water

Zhai Zhengjia， Li Guolong， Zhu Hengxuan， Yang Li， Wang Jin

School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300400, China

Received:2019-05-02 Revised:2019-08-09 Published:2020-04-28 Online:2020-05-22

摘要/Abstract

摘要： 对电加热器中纳米流体的传热效果进行了实验研究，采用两步法制备Fe3O4⁃水纳米流体。此外，还研究了质量分数为0.1%~2.0%的Fe3O4⁃水纳米流体在有/无磁场作用下对电加热器换热效率的影响，探讨了磁场作用下纳米流体的强化换热机理。结果表明，与基液（去离子水）相比，无磁场时质量分数为1.0%的Fe3O4⁃水纳米流体可使环境温度提升18.2%；在外磁场作用下，质量分数为1.0%的Fe3O4⁃水纳米流体可使环境温度提升35.1%。研究结果可为纳米流体在电加热器中的强化传热研究提供重要参考。

关键词: 电加热器, 　纳米流体, 　磁场, 　自然对流, 　强化传热

Abstract: The heat transfer effect of nanofluid in electric heater was studied. Fe3O4⁃water nanofluid was prepared by two⁃step method. The effect of Fe3O4⁃water nanofluid with various nanoparticle concentrations (mass fraction of 0.1%~2.0%) on heating efficiency of the electric heater with or without magnetic field was studied. Mechanism of enhanced heat transfer by Fe3O4⁃water nanofluids under a magnetic field was also discussed. Results show that the Fe3O4⁃water nanofluid with a mass fraction of 1.0% obtains 18.2% enhancement of heat transfer on environment temperature compares to without a magnetic field. The Fe3O4⁃water nanofluid with a mass fraction of 1.0% obtains 35.1% enhancement of heat transfer on environment temperature with an external magnetic field. This research provides an important reference for enhancements of natural convective heat transfer in nanofluid applications.

Key words: Electric heater, Nanofluid, Magnetic field, Natural convection, Heat transfer enhancement

翟郑佳，李国龙，朱恒宣，杨历，王进. 磁场对Fe₃O₄⁃水纳米流体传热特性的影响[J]. 辽宁石油化工大学学报, 2020, 40(2): 22-29.

Zhai Zhengjia， Li Guolong， Zhu Hengxuan， Yang Li， Wang Jin. Effect of Magnetic Field on Heat Transfer Characteristics of Fe₃O₄⁃Water[J]. Journal of Liaoning Petrochemical University, 2020, 40(2): 22-29.

磁场对Fe₃O₄⁃水纳米流体传热特性的影响

Effect of Magnetic Field on Heat Transfer Characteristics of Fe₃O₄⁃Water

HTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics