• Title, Summary, Keyword: Electrostatic precipitator

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The Effect of Acoustic Energy on the Collection Efficiency of the Electrostatic Precipitator (음파에너지가 전기 집진기의 집진 효율에 미치는 영향)

  • 정상현;홍원석;김용진;심성훈
    • Journal of Energy Engineering
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    • v.12 no.3
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    • pp.207-215
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    • 2003
  • An experimental study on the characteristics of collection efficiency for electrostatic precipitator under the action of acoustic energy in the gas stream was performed. In the experiment, the acoustic energy which has 2 kHz and 141 dB was applied to electrostatic precipitator inlet, and the test parameters were used in terms of the magnitude of gas velocity. From the results of experiment, the collection efficiency of ESP was increased due to acoustic energy, and this effect was much clearer at high velocity. This means that the acoustic energy can play an important role in the enlargement of specific collection area of the electrostatic precipitator.

A Study on the Collection Characteristics of a Moving Electrode Electrostatic Precipitator - II. Effect of Wave Form of Pulse Energization and Dust Concentration - (이동 전극형 전기집진기의 집진특성에 관한 연구 - II. 펄스 하전 파형 및 분진농도의 영향 -)

  • Kim Yong-Jin;Ha Byung-Kil;Jeong Sang-Hyun;Hong Won-Seok;Yoo Joo-Sik
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.16 no.10
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    • pp.908-913
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    • 2004
  • This study investigates the effect of the wave form of pulse energization and dust concentration on the collection characteristics of a moving electrode electrostatic precipitator (MEEP). Under the same specific corona power, the collection efficiency of the MEEP for the lower dust concentration ($2g/m^3$) becomes higher than that for the higher concentration ($10g/m^3$). Both the collection efficiency and specific corona power increase with increasing pulse period for the same value of applied voltage. The collection efficiency of MEEP is higher than that of the conventional fixed plate electrode electrostatic precipitator.

Numerical Study of Particle Collection Performance of Electrostatic Precipitator Integrated with Double Skin Façade in Residential Buildings (주거건물용 이중외피 통합형 전기집진기의 미세먼지 집진성능 수치해석 평가)

  • Eom, Ye Seul;Choi, Dong Hee;Kang, Dong Hwa
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.34 no.12
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    • pp.73-82
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    • 2018
  • The objective of this study was to evaluate particle collection performance of electrostatic precipitator (ESP) integrated with double skin façade in naturally ventilated residential buildings using numerical method. To evaluate the efficiency, computational fluid dynamics (CFD) simulation based on electric potential and Lagrangian method was applied. The CFD model was validated by comparing the simulated results with the experimental data including thermal characteristic of double skin façade (DSF) and particle removal characteristic of electrostatic precipitator. The validation results showed that the root mean square error (RMSE) between predicted values and measured values of velocity and temperature in intermediate space of DSF was 1.2%. The adequacy of ion space charge density and turbulent model were determined. The RMSE between predicted values and measured values of collection efficiency of ESP was 9.2%. In addition, the case study was performed to present the application of the numerical method based on validation results of ESP integrated with façade.

Numerical Investigation on Capture of Sub-Micron particles in Electrostatic Precipitator without Corona Discharger (코로나 방전기가 없는 전기집진기의 미세입자 집진에 관한 수치해석)

  • Lee, Jin-Woon;Jang, Jae-Sung;Lee, Seong-Hyuk
    • Journal of ILASS-Korea
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    • v.16 no.2
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    • pp.69-75
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    • 2011
  • This article presents computational fluid dynamics (CFD) simulations of sub-micron particle movements and flow characteristics in laboratory-scale electrostatic precipitator (ESP) without corona discharge, and for simulation, it uses the commercial CFD program (CFD-ACE) including electrostatic theory and Lagrangian-based equation for sub-micron particle movement. For validation of CFD results, a simple cylindrical type of ESP is simulated and numerical prediction shows fairly good agreement with the analytical solution. In particular, the present study investigates the effect of particle diameter, inlet flow rate, and applied electric potential on particle collection efficiency and compares the numerical prediction with the experimental data, showing good agreement. It is found that the particle collection efficiency decreases with increasing inlet flow rate because the particle detention time becomes shorter, whereas it decreases with the increase in sub-micron particle diameter and with the decrease of applied electric voltage resulting from smaller terminal electrostatic velocity.

Predicted Optimum Efficiency due to Changes in the Design Parameters of the Small Electrostatic Precipitator (설계인자 변화에 따른 소형 전기집진장치의 최적효율 예측)

  • Suh, Jeong-Min;Yi, Pyong-In;Jung, Moon-Sub;Park, Jeong-Ho;Lim, Woo-Taik;Park, Chool-Jae;Choi, Kum-Chan
    • Journal of Environmental Science International
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    • v.22 no.9
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    • pp.1187-1197
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    • 2013
  • The result of a small electrostatic precipitator which is in order to decrease indoor air pollution for optimal efficiency was shown as follows. Although the closer distance between the discharge electrode and dust collecting electrode shows the better throughput efficiency by forming strong electrostatic Field, it does not have profound impact in case of optimal dust collecting area. G.P(gas passage) which is the distance from dust collecting electrode to dust collecting electrode is a crucial factor to decide dust collecting efficiency. The narrower distance of G.P shows the better throughput efficiency whereas it decreases when the distance is too narrow since sparks ensue by increasing the capacity of electrostatic charging system 5 mm regards as optimal efficiency in this experiment. Although the higher voltage shows the higher dust collecting efficiency overall, the experiment was not able to keep performing since the sparks which decrease dust collecting efficiency ensue over 40 kV. The efficient and safe voltage state is considered 3.6 kV in this experiment. The most crucial factor for dust collecting efficiency of an electrostatic precipitator which is in order to decrease indoor air pollution is applied voltage. In addition, optimal raw gas flow rate(2.4 m/sec) is more important factor than the excessive increase of dust collecting area.

A Study on the Collection Characteristics of Submicron Particles in an Electrostatic Precipitator - II. Collection Efficiency Characteristics (전기 집진기에서의 Submicron 입자의 집진 특성에 관한 연구-II. 집진 효율 특성)

  • 김용진;여석준;유주식
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.13 no.7
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    • pp.579-587
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    • 2001
  • This study investigates particle collection characteristics of a cylindrical electrostatic precipitator. Experimental work has been made for the submicron particles. The effects of polarity of discharge electrode wire, particle diameter, gas velocity, gas temperature, and specific corona power on the particle collection efficiency are investigated. The efficiency of negative corona is higher than that of positive corona. as the particle diameter increases, the efficiency is decreased when the diameter is in the range of 0.02-0.6 micron, but is increased for the nanometer particles with diameter smaller than 0.02 micron. The efficiency is increased with increase of specific corona power. As the gas temperature increases, overall collection efficiency is increased for a negative corona, but is deceased for a positive corona.

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Basic Study on an Aftertreatment System of Diesel Particulate Matters with Electrostatic Precipitator and Cyclone (전기집진기와 사이클론을 응용한 디젤 입자상 물질의 후처리장치 기초연구)

  • 최인수
    • Transactions of the Korean Society of Automotive Engineers
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    • v.9 no.6
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    • pp.8-15
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    • 2001
  • An aftertreatment system of diesel exhaust gas was attempted to extract particulate matters. The system consisted of a corona-less electrostatic precipitator to agglomerate soot particles and a counter-flow cyclone to collect them. When the effect of high voltage was examined at different configuration of electrode plates, the case of positive 15kV at both plates showed the maximum reduction of 38% in diesel smoke level. However, the back pressure became quite high as engine speed increased, so that minimizing pressure drop in cyclone should be studied with improving collection efficiency of soot particles.

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Collection Efficiency of Nano Particles by Electrostatic Precipitator using Dielectric Barrier Discharge (배리어 유전체 방전을 이용한 전기 집진부에서의 나노 입자 집진 효율)

  • Kang, Suk-Hoon;Ji, Jun-Ho;Byeon, Jeong-Hoon;Hwang, Jung-Ho
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.27 no.11
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    • pp.1542-1547
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    • 2003
  • Although dielectric barrier discharge (DBD) in air has been applied to a wider range of aftertreatment processes for HAPs (Hazardous Air Pollutants), due to its high electron density and energy, its potential use as precharging dust particles is not well known. In this work, we measured size distributions of bimodal aerosol particles and estimated collection efficiency of the particles by an electrostatic precipitator (ESP) using DBD as particle charger. To examine the particle collection with DBD charger, nano size particles of NaCl(20∼100nm) and DOS (50∼500nm) were generated by a tube furnace and an atomizer, respectively. For experimental conditions of 60㎐, 11㎸ and 60 lpm, the particle collection efficiency for the hybrid system was over 85%, based on the number of particles captured.

Collection Efficiency of Nano Particles by Electrostatic Precipitator using Dielectric Barrier Discharge (배리어 유전체 방전을 이용한 전기 집진부에서의 나노 입자 집진 효율)

  • Kang, Suk-Hoon;Byeon, Jung-Hoon;Ji, Jun-Ho;Hwang, Jung-Ho
    • Proceedings of the KSME Conference
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    • pp.1435-1440
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    • 2003
  • Although Dielectric Barrier Discharge (DBD) in air has been applied to a wider range of aftertreatment processes for HAPs(Hazardous Air Pollutants), due to its high electron density and energy, its potential use as precharging dust particles is not well known. In this work, we measured size distributions of bimodal aerosol particles and estimated collection efficiency of the particles by electrostatic precipitator(ESP) using DBD as particle charger. To examine the particle collection with DBD charger, nano size particles of NaCl($20{\sim}100$ nm) and DOS($50{\sim}800$ nm) were generated by tube furnace and atomizer, respectively. For experimental conditions of 60 Hz, 11 kV, and 60 lpm, the particle collection efficiency for the hybrid system comprising DBD charger and ESP was over 85 %, based on the number of particles captured.

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Optimal Design of Discharge Electrode Frame in Electrostatic Precipitator (전기집전기 방전극 프레임 최적 설계)

  • 이후광;최재승;황석환;조창호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.626-629
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    • 1997
  • In this study, position optimization of insulation rods and suspension rods in discharge electrode frame of electrostatic precipitator(EP) is performed using finite element analysis(FEA). The object of the optimization is to minimize the difference of altitudes in unevenly sagged horizontal structure and to regulate the size of materials within the allowable stress bounds. Uppermost horizontal channel of discharge electrode frame is highly stressed and uniformity of lowest horizontal angle depends on the position of rods. Ten types of frame are analyzed and one recommended model is presented.

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