Basic and theoretical operation of ESPs

Riehle, Claus

doi:10.1007/978-94-009-1553-4_3

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…Riehle (1997) demonstrates that, for typical electrical conditions in an ESP (which is the case in this work), the particle charge reaches its equilibrium Q pi 1 within 454 M. C. R. Falaguasta et al…”

Section: Deutsch-anderson Equationmentioning

confidence: 85%

“…However, it was pointed out that precipitators in operation are frequently oversized (Felder & Arce-Medina, 1980;Cañ nadas et al, 1997;Gallimberti, 1998), a fact that results in an appreciable increase in cost. One of the reasons for this is the frequent use of the Deutsch-Anderson equation in the project, which underestimates the removal efficiency of the particles in the sub-micrometric range, as observed by various authors (Leonard et al, 1980;Riehle, 1997;Parker, 1997). On the other hand, when the project is accomplished through data obtained from equipment in operation, according to Blanchard et al (2001), many times the designer commits errors due to the difficulty in matching the experimental conditions (Felder & Arce-Medina, 1980).…”

Section: Introductionmentioning

confidence: 91%

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Scaleup Investigation of a Wire-Plate Geometry Electrostatic Precipitator

Falaguasta

Coury

Nóbrega

2006

Particulate Science and Technology

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Experimental tests were carried out in three geometrically similar laboratory-scale wire-plate electrostatic precipitators in order to evaluate the best electric parameter for scaling the equipment. The parameters kept constant were the pseudo-homogeneous electric field, E p , the current density, j, the dimensionless voltage, U 0 , and the power consumption per unit collection area, P A . The experimental tests consisted in measuring the overall efficiency of particle removal, which was used as the comparison parameter. The results indicated that, for constant U 0 , efficiency increased with precipitator size. As for the parameters E p and P A , the data were scattered and showed no clear tendency. Finally, by keeping j constant, the overall efficiency of the precipitator remained constant (within AE 5%), regardless of the precipitator size. Precipitator efficiency increased exponentially with increase in power consumption per unit gas volume, and all data were well fitted to a power law correlation.

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Section: Deutsch-anderson Equationmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 91%

Scaleup Investigation of a Wire-Plate Geometry Electrostatic Precipitator

Falaguasta

Coury

Nóbrega

2006

Particulate Science and Technology

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“…(2) only, strictly speaking, applies to the electric field in between two plates. However, the pseudo-homogeneous electric field strength has been used for ESPs because of its simplicity (Riehle, 1997). Eq.…”

Section: Voltage-current Characteristicsmentioning

confidence: 99%

Capture of Ultrafine Particles Using a Film-Type Electret Filter with a Unipolar Charger

Sambudi

Choi

Lee

et al. 2017

Aerosol Air Qual. Res.

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Electret filters have been used widely to collect particles because of their low pressure drop and high collection efficiency due to the electrostatic attraction between the particles and filter. However, the collection efficiency of these filters decreases over time due to charge degradation. Therefore, a unipolar charger using a corona discharge was combined with an electret filter to overcome this decrease. The highest particle collection efficiency for 70 nm, uncharged particles occurred with a fresh electret filter was 34.0%, whereas a neutralized filter had a collection efficiency of 32.6%. However, when fresh and neutralized electret filters were used with a unipolar charger (electret field: 1.9 kV cm -1 ), the highest particle collection efficiencies of 99.8% and 98.2%, respectively, were obtained and appeared at the electrode-tomesh distance, a distance similar to the duct diameter. The distance between the tip of the discharge electrode and filter, which can be predicted using Sigmond's law, affected the charge density value on the filter surface. The ozone concentration was negligible under optimum conditions for particle collection. Therefore, using an electret filter combined with a corona discharge has good potential for improving air purifiers.

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“…He considers the forces acting on spherical particles to be the electrical Coulomb and the Stokes' fluid drag forces. Apart from the boundary layer, the particles in the downstream direction have the mean velocity of the fluid, they are fully charged and they migrate in a homogeneous electrical field (Riehle 1997). In order to improve the assumption of infinite diffusivity of the Deutsch model, many researchers tried to develop finite diffusivity models by dealing with the convective-diffusion equation using various boundary conditions.…”

Section: Esp Collection Efficiency Theoriesmentioning

confidence: 99%

Methodology for Performance Evaluation of Dust Control Systems with an Application to Electrostatic Precipitators

Economopoulou

Harrison

2008

Aerosol Science and Technology

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A general methodology is presented that enables rigorous estimation of the total collection efficiency and the size distribution of particles penetrating dust control systems. This methodology assumes lognormal inlet particle-size distributions and can be used with fractional efficiency formulations that predict, under such conditions, lognormal outlet particle-size distributions. Multimodal inlet particle distributions can be accommodated additively. This methodology is applied to Electrostatic Precipitator Systems LIST OF SYMBOLSA area of the precipitator collection plate, m 2 ; b width of the electrostatic precipitator, m;

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Basic and theoretical operation of ESPs

Cited by 9 publications

References 14 publications

Scaleup Investigation of a Wire-Plate Geometry Electrostatic Precipitator

Scaleup Investigation of a Wire-Plate Geometry Electrostatic Precipitator

Capture of Ultrafine Particles Using a Film-Type Electret Filter with a Unipolar Charger

Methodology for Performance Evaluation of Dust Control Systems with an Application to Electrostatic Precipitators

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