Convective heat transfer enhancement by corona discharge in a wire-cylinder electrostatic precipitator with the water-cooling system

被引：2

作者：

Fu, Hui ^{[1
]}

Xu, Wenyi ^{[1
]}

Li, Shuran ^{[2
,3
]}

Liu, Zhen ^{[1
]}

Yan, Keping ^{[1
,4
]}

机构：

[1] Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310028, Peoples R China

[2] Zhejiang Univ, Sch Mech Engn, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ, Sch Mech Engn, Key Lab Adv Mfg Technol Zhejiang Prov, Hangzhou 310027, Peoples R China

[4] Shanxi Zheda Inst Adv Mat & Chem Engn, Taiyuan 030002, Peoples R China

来源：

JOURNAL OF ELECTROSTATICS | 2023年 / 125卷

基金：

国家重点研发计划;

关键词：

Corona discharge; Ionic wind; Heat exchange; Electrostatic precipitation; IONIC WIND; PERFORMANCE; ELECTRODE; PLATE; OPTIMIZATION; TEMPERATURE; FLOW;

D O I：

10.1016/j.elstat.2023.103845

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Aiming at the current wet plume problem, we present a novel technique to integrate electrostatic precipitator (ESP) and heat exchanger in order to simultaneously increase heat exchange efficiency, collect water and control particle emission from flue gases. Unlike the conventional ESP, a lab-scale wire-cylinder type ESP with the collection electrode cooling by water is used for investigations in this paper. Our research indicates that the heat transfer coefficient of the ESP rises with reducing gaseous velocity, increasing applied voltage, corona current or gas temperature. The maximum improvement of the total heat transfer coefficient of 271% was achieved at 0.15 m/s, 80 degrees C and 16 kV of the negative discharge. Moreover, the presence of Particle matters can enhance the heat transfer coefficient by 9%-16%. The ionic wind, which is quantitatively expressed by electro-hydrodynamic number, plays a key role in modifying the gas flow patterns and consequently improving the heat exchange coefficient. For lowering the overall energy consumption, it is suggested that the ESP should be operated at a specific mode of low voltage and high current.

引用

页数：11