SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (3): 623-630.DOI: 10.1016/j.cjche.2017.10.022

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Effect of heat flux and inlet temperature on the fouling characteristics of nanoparticles

Jingtao Wang, Zhiming Xu, Zhimin Han, Yu Zhao   

  1. College of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China
  • 收稿日期:2017-05-12 修回日期:2017-10-15 出版日期:2018-03-28 发布日期:2018-04-18
  • 通讯作者: Zhiming Xu
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51476025).

Effect of heat flux and inlet temperature on the fouling characteristics of nanoparticles

Jingtao Wang, Zhiming Xu, Zhimin Han, Yu Zhao   

  1. College of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China
  • Received:2017-05-12 Revised:2017-10-15 Online:2018-03-28 Published:2018-04-18
  • Contact: Zhiming Xu
  • Supported by:

    Supported by the National Natural Science Foundation of China (51476025).

摘要: In order to study the effect of heat flux and inlet temperature on the fouling characteristics of nanoparticles, and to further reveal the fouling mechanism for insights into proper operating conditions, γ-Al2O3/water suspensions were chosen as the subject of this research. The particulate fouling characteristics of γ-Al2O3/water suspensions on the surface of stainless steel have been experimentally studied by varying the heat flux and the inlet temperature under single-phase flow and subcooled-flow boiling conditions. The results show that in the condition of single-phase flow, the asymptotic value of fouling resistance decreases with increasing of heat flux and inlet temperature. The asymptotic value of fouling resistance under single-phase flow is much higher than for the subcooled-flow boiling condition. The effect of heat flux on the fouling resistance under the two flow states has an inverse relationship, and there exists a minimum value of fouling resistance between these two states. For subcooled-flow boiling, the asymptotic value of fouling resistance increases with increasing heat flux, whereas the effect on fouling resistance by the inlet temperature is negligible.

关键词: Inlet temperature, Heat flux, Particulate fouling characteristics, Single-phase flow, Subcooled-flow boiling

Abstract: In order to study the effect of heat flux and inlet temperature on the fouling characteristics of nanoparticles, and to further reveal the fouling mechanism for insights into proper operating conditions, γ-Al2O3/water suspensions were chosen as the subject of this research. The particulate fouling characteristics of γ-Al2O3/water suspensions on the surface of stainless steel have been experimentally studied by varying the heat flux and the inlet temperature under single-phase flow and subcooled-flow boiling conditions. The results show that in the condition of single-phase flow, the asymptotic value of fouling resistance decreases with increasing of heat flux and inlet temperature. The asymptotic value of fouling resistance under single-phase flow is much higher than for the subcooled-flow boiling condition. The effect of heat flux on the fouling resistance under the two flow states has an inverse relationship, and there exists a minimum value of fouling resistance between these two states. For subcooled-flow boiling, the asymptotic value of fouling resistance increases with increasing heat flux, whereas the effect on fouling resistance by the inlet temperature is negligible.

Key words: Inlet temperature, Heat flux, Particulate fouling characteristics, Single-phase flow, Subcooled-flow boiling