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Mermigkas, Athanasios. "Micro-electrostatic precipitation for air treatment." Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27901.
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Particulate matter suspended in the atmosphere is a major contaminant and is prevalent in urban environs, reducing the quality of air in the places that the majority of humans reside. Medical research has labelled PM2.5 as a potential risk to human health. To combat this issue, new legislation regarding PM2.5 has been passed. Electrostatic precipitators exhibit a drop in efficiency at ~(0.1-1) μm PM diameter. Therefore, the present work is focused on an investigation of microelectrostatic precipitation technology, for improvement of indoor air quality. Initial work included investigation of impulsive positive energisation, in a specially designed single stage, coaxial reactor, utilizing 250 ns impulses superimposed on dc voltage. Precipitation efficiency for coarse and fine powders has been investigated for various levels of superimposed impulsive and dc energisation in order to identify optimal energisation conditions. Further steps were taken to decouple charging from collection stages in order to optimize the air cleaning process to a greater extent. Precipitation experiments were conducted using ambient air and cigarette smoke. Maximum precipitation efficiency was achieved when both stages were energised, under impulsive and dc energisation in each stage respectively. Analytical work regarding PM charging has also been conducted. Lastly, the coaxial precipitator reactor was scaled-up for possible indoor air cleaning applications. Similarly, impulsive energisation combined with dc voltage at the different stages has been used and proved to increase precipitation efficiency. Test fluids used were beeswax candle fumes and ambient air. Simulations have also been conducted to optimize the ESP process. In conclusion, it has been shown that impulsive energisation of ESPs is highly efficient,100% for particles greater than 250 nm, for PM2.5 in concentrations found in indoor environments. This could potentially help in increasing indoor air quality, with all the corresponding health, working efficiency and ultimately state economic benefits it could achieve.
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Haynes, Nicholas. "The sieving electrostatic precipitator." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176404052.
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BETTHOUD, JOSE SIMOES. "THEORETICAL AND EXPERIMENTAL INVESTIGATION ON ELECTROSTATIC PRECIPITATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18993@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORO presente trabalho realiza a integração entre a solução computacional por elementos finitos para as equações que descrevem s condições elétricas reinantes no espaço interletrodos de um Precipitador Eletrostático (PE) fio-placas e dados experimentais obtidos em um canal de precipitação com a mesma forma geométrica. A integração acima é necessária à qualquer tentativa de projeto teórico de um PE, uma vez que tais equações exigem para o seu fechamento a introdução de um parâmetro denominado mobilidade de portador de carga, para o qual não se tem possibilidade de previsão teórica de valor, devido ao grande número de variáveis físicas que podem influenciá-lo. Além disso, as soluções teóricas em geral são obtidas dentro de uma modelagem que supõe a existência de um canal de placas paralelas provido de alguns eletrodos emissores consecutivamente dispostos na linha central do canal de precipitação. Essa redução da situação real à uma situação simplificada impede a observação crucial de que o fenômeno de precipitação eletrostática em um PE é um fenômeno que sofre uma variação física contínua ao longo da região de precipitação, à medida que material particulado vai sendo retirado da carga em escoamento. Qualquer solução teórica acaba sendo de pouca utilidade ao projeto de um canal de precipitação completo. No presente trabalho estamos propondo a utilização de um equipamento laboratorial que permite a medição de correntes elétricas entregues por portadores de carga em áreas discretas das placas planas aterradas em um escoamento de ar com cargas de particulados sólidos, dentro de um canal de precipitação com um número razoável de eletrodos emissores. A partir das correntes de placa medida é determinada um valor para mobilidade elétrica associada a cada região longitudinal da secção de precipitação. Essa mobilidade elétrica é então adimensionalizada em termos de alguns parâmetros, sendo que no presente representa a profundidade de penetração no campo de precipitação. Por fim utiliza-se a mobilidade elétrica adimensional como predição para as condições elétricas à serem esperadas em diferentes valores de tensão aplicada, sendo sugerido seu uso como ferramenta auxiliar no projeto de precipitadores eletrostáticos. Foi observado que o campo elétrico originado em cada um dos eletrodos apresenta uma ação alternada de aceleração ou desaceleração sobre o material particulado em suspensão, respectivamente nas regiões imediatamente após, ou antes, de cada eletrodo emissor, relativamente à direção do escoamento. Esse fenômeno físico, não mencionado em qualquer uma das referencias do presente trabalho, foi denominado aqui efeito de alternância e tem uma importância fundamental com relação ao uso da mobilidade adimensional no projeto de PÉS e também quanto às possibilidades de otimização de PÉS já em operação.
This work integrates a numerical solution, obtained by finite elements and characteristic methods applied to the governing equations of the electrical conditions in the inter-electrodes region of a wire-plate Eletrostatic Precipitador (EP), with data acquired in a precipitation channel with the same geometric form. The integration above mentioned is demanded by any attempt of an analytical project of an EP due to the introduction of a paramenter, denominated mobility of the charge carriers, in the closure of the governing equations. Further, the analytical solutions are in general obtained under the modeling of a precipitation region provided with a small number of corona wires, just enough to give simetry considerations. It must be kept in mind that in an EP each channel is provided with dozens of corona wires. The simplification above interdicts the crucial observation that the precipitation phenomena in an EP suffers physical changes along the axial length of the channel, due to the continuos wuthdrawing of particulate material from the total load. Solutions apropiated to a single region are so not very useful to the project of an entire channel. In this work we present an experimental apparatus which allows the measurement of eletric currents in discrete areas of the colleting plates. The apparatus is provided with a number of corona wires that can simulate a channel of an EP. Using the values of the currents measured at each of thediscrete plates it is obtained a value for the electrical mobility associated to discrete regions longitudinally with the flow. A dimensionless mobility is then obtained in terms of some parameters. In the present work these parameters were restricted to the applied potential. It is then suggested how an EP projectist could use the method as a tool for helping in the design process. It was observed that the eletric field originated in each of the corona wires acts alternatedely accelerating or desaccelerating the charged particulate load, pespectively in the regions immediately after or before each corona wire, with respect to the main direction of the flow. This physical phenomena, not mentioned in any of the references of the present work, was denomitade here as alternation effect, and has fundamental importance in the use of the dimensionless mobility as a project tool and also in the possibilities of upgrading Eps already in use.
4
Gottipati, Pranitha. "The dry sieving electrostatic precipitator." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176320016.
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Bahner, Mark A. "A reduced-turbulence, reduced-entrainment electrostatic precipitator." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040702/.
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Khan, Wajahat. "Moving-membrane-based electrostatic precipitator." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1173975992.
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Pershad, Sathish Kumar. "An investigation into the use of electrode mass measurement to optimise an electrostatic precipitator unit." Thesis, Port Elizabeth Technikon, 2001. http://hdl.handle.net/10948/66.
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Electrostatic precipitators (ESP’s) can be simply described as particle collection devices and service a wide variety of industries. This particle collection can either be classed as a cleansing or product recovery (or both) process. They can be found in fossil fueled power generation plant (municipal incinerators, iron and steel industries (sinter plants, coke ovens), non ferrous industries, rock products (cement, lime), chemical and petrochemical (detarrers, de-oilers) They have been around for approximately 70 years and their fundamental principle of operation has not changed much during this time. What has changed is the demand on their operating efficiency. Environmental pressure as well as the loss of product has forced ESP’s to perform even better than before. This performance enhancement is two-fold : an increase in collection efficiency and a reduction in maintenance and wear costs. This project researches the use of mass measurement techniques to optimise the operation of ESP’s from both the above mentioned perspectives.
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McLellan, P. G. "Control of rectifier equipment used for electrostatic precipitation." Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375938.
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Isaksson, Martin, and Björn Nilsson. "Electrostatic Precipitation-Based Air Sampler for Collection of Airborne Viruses." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200534.
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Ivanenko, Yevhen. "Modelling and Simulation of Electrostatic Precipitators with a Dust Layer." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-44773.
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A dust layer, especially based on high-resistivity dust, at the collecting electrodes may cause a back corona discharge in electrostatic precipitators (ESP). It can significantly reduce the ESP efficiency and as a result cause ecological damages. To study the dust layer influence inside ESPs, it is necessary to derive an adequate model of the ESP precipitation process with a dust layer at the collecting electrode. The research of the present thesis is focused on stationary studies of the precipitation process with a dust layer at the collecting electrode in ESPs. Three mathematical models are proposed as a description of the precipitation process with a dust layer at the collecting electrode. The models are based on Maxwell’s equations and the finite element method (FEM). COMSOL Multiphysics software is used for their implementation. In all models the dust layer has constant conductivity and the air region has constant ion mobility. In the first model there are no coupling conditions, which is required in mathematics, are given between the two regions. The solution found by COMSOL Multiphysics does not provide physically acceptable coupling conditions. In the second model, a continuous transition zone is introduced between the two regions so that no coupling conditions are required. With the large derivatives in the transition zone, the nonlinear solver in COMSOL Multiphysics does not converge. Finally, in the third model, the dust layer and the grounded collecting electrode are replaced with a boundary condition for the air region. The properties of the third model are investigated, and these models can be used to study the influence of the dust layer. The results of these investigations are reported and discussed.
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Pimparkar, P. M. "The effect of additives on the electrostatic precipitation of fly ash." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353773.
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Ramamoorthy, Thiagarajan. "Mechanical behavior of membranes in electrostatic pecipitators." Ohio : Ohio University, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125868299.
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Vijapur, Santosh H. "Design optimization and experimental study of a wet laminar electrostatic precipitator for enchancing collection efficiency of aerosols." Ohio : Ohio University, 2008. http://www.ohiolink.edu/etd/view.cgi?ohiou1227020758.
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Franz, Eric. "Parameters affecting deposition of electrostatically-charged aqueous sprays." Connect to resource, 1985. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1201634653.
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MANUZON, RODERICK BEROIN. "Electrostatic Precipitation Technologies for the Mitigation of Particulate Matter Emissions from Poultry Facilities." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345562603.
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Williams, John Denis. "An investigation into pulsating aurora /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/6820.
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Yuen, Albert Wai Ling Materials Science & Engineering Faculty of Science UNSW. "Collector current density and dust collection in wire-plate electrostatic precipitators." Awarded by:University of New South Wales. Materials Science and Engineering, 2006. http://handle.unsw.edu.au/1959.4/28274.
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Even minimal improvements in particle collection efficiency of electrostatic precipitators significantly reduce dust emission from fossil-fuelled power stations and reduce pollution. Yet current designs rely on the Deutsch collection theory, which was developed for tubular precipitators and has been applied to wire-plate precipitators on the assumption that the inter-electrode electric fields at the same discharge distance in both were similar. Differences in geometry and associated collector electric fields and current density non-uniformity have not been taken into account, although the collector electric field and current density of the wire-plate precipitator are not uniform. And observations show that precipitated dust patterns and the distribution of collector current density are interrelated. Investigations revealed a simple square law relationship between the collector electric field and the collector current density in the space charge dominated coronas. Applying this relationship to the Deutsch collection theory led to a current-density-based collection formula that takes into account the non-uniform collector current density distribution. The current-density-based collection formula is then used to assess the impact of collector current density on collection efficiency, the results closely following published measurements. Applying the current-density-based collection formula to estimate the dust accumulation shows that most of the dust accumulates at collector locations facing the corona wires. The effect of the non-uniform precipitated dust layer on collection performance is assessed using the distributed corona impedance - the ratio of the inter-electrode voltage and the non-uniform collector current. Re-distribution of the collector current profile as dust builds up is also compatible with published measurements. Finally this is applied to optimize the wire-plate precipitator collection performance. This shows that optimal collection performance is obtained with the wire-wire spacing less than the wire-plate distance, once again confirming published experimental results. This is the first analytical approach to show better collection performance can be achieved at the ratio of wire-wire spacing/wire-plate distance not equal to unity, which has been the standard industry practice since 1960.
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Dissanayake, Nishantha B. "Deposition of titanium dioxide by physical vapor deposition." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1175020765.
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Moody, Gary Paul. "Reducing particulate matter emissions from residential wood burning stoves by electrostatic precipitation : a CFD modeling study." Mémoire, École de technologie supérieure, 2010. http://espace.etsmtl.ca/654/1/MOODY_Gary_Paul.pdf.
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Les émissions de matière particulaire fine (MP2.5) provenant des poêles à bois résidentiels
sont une source majeure de pollution atmosphérique en Amérique du nord et en Europe du
nord en hiver. Cette pollution a été liée à de nombreux problèmes de santé respiratoires.
Nous pouvons réduire ces émissions par l’utilisation d’un précipitateur électrostatique (PES)
à la sortie du tuyau d’échappement des gaz de combustion. Cette étude avait comme
hypothèse qu’un tel dispositif pouvait opérer de façon efficace et ainsi contribuer à une
réduction substantielle des émissions de particules fines provenant du secteur de chauffage au
bois résidentiel. Un modèle numérique en 2-D d’un PES a été crée et simulé avec un logiciel
commercial de mécanique des fluides numériques. Le modèle et le procédé comportaient
plusieurs améliorations par rapport aux modèles trouvés dans la littérature, dont : l’utilisation
d’une distribution de particules polydispersées, l’utilisation d’un écoulement semi-établi à
l’admission des gaz et l’utilisation d’un modèle de chargement des particules qui tient
compte des chargements par diffusion et par champs. La technique a été validée par des
données expérimentales, et les valeurs de rendement correspondaient avec moins de 5%
d’écart aux valeurs expérimentales. Un modèle de référence basé sur les dimensions d’un
tuyau d’échappement standard de 0,15 m de diamètre a été simulé et le rendement global
était de 75%. L’utilisation répandue de ce dispositif pourrait mener à une réduction de 64%
des émissions de MP2.5 provenant du secteur de chauffage au bois résidentiel au Québec. Il y
a plusieurs défis opérationnels et de sécurité qui doivent être surmontés avant de pouvoir
commercialiser un tel dispositif.
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Veluthen, Vijayagopal. "Plasma enhanced mercury capture in wet electrostatic precipitators." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1177527557.
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Steyn, Hermanus Johannes. "Particle deflection and plate-out dynamics in a helium stream." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2285.
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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2009.ENGLISH ABSTRACT: In the primary circuit components of high temperature reactors, various unwanted particles have been found. These particles include, for example, graphite and silver- 110 (110mAg). The silver-110 (110mAg) particles are radioactive, with a half-life of 253 days. The presence of radioactive particles in the primary circuit components constitutes an unwanted maintenance problem from a radiation hazard point of view. The development of a method to remove these particles from the helium stream is therefore needed. This thesis consideres two possible methods of removing silver from the helium stream, namely laser ablation of microparticles and electrostatic precipitation. These methods require the generation of silver ions or charged particles, the deflection of these particles in a helium gas stream passing through an electric field and the subsequent plate-out of these particles onto deflection electrodes. To find a suitable method of generating ions, various methods to generate the silver ions were investigated and evaluated. These methods include existing ion sources, thermionic, field and photoelectric emission and laser ablation of microparticles. No existing ion sources could be found which could be utilised in helium at high pressure. From calculations it was concluded that thermionic, field and photoelectric emission could also not be used to raise the energy of the emitted electrons sufficiently to ionize silver in a helium flight path. These methods were found not to be feasible ion sources in helium at high pressures. However, laser ablation of microparticles was found to constitute a feasible technology. Laser ablation was successfully utilised by Nichols et al. (2000) to deflect silver nanoparticles in an electric field across a two bar helium stream. An apparatus, similar to the one developed by Nichols et al. (2000), was designed and built. The apparatus included a silver insertion mechanism and tests with this apparatus were called the microparticle tests. To determine the efficacy of the silver insertion mechanism, the microparticle tests were done without the use of a laser. It was found that a laser was not necessary as microparticles collected on both the deflection electrodes. Dielectrophoresis was proposed as a possible explanation for the deflection and the plate-out of the mcroparticles. To theoretically model the deflection of the silver particles, two models were proposed, namely the deterministic and the stochastic deflection models. The latter describes the deflection of atoms, ions and polarized particles by using probability theory. From this model it was found that the Brownian motion force is far larger that the force created by the polarizibility of the atom due to an electric field. The deterministic deflection model describes the deflection of larger particles in a continuum. From this model it was found that a silver microparticle with a radius of 3 mm in a helium stream with bulk velocity of 0.0198 m/s would deflect 4.6 mm per helium flight path length of 140 mm. From these calculation it was found that the apparatus which had been built was not long enough to deflect and plate-out all the silver microparticles. The dielectrophoresis force on nanoparticles cannot be calculated, as the theory of dielectrophoresis is only valid for particles with diameter larger than 1 mm. Changes were therefore made to the apparatus to generate nanoparticles as their mobility is larger than that of microparticles. The nanoparticles were created by means of an arc discharge in helium; therefore tests with this modified apparatus were called the arc discharge test. The nanoparticles so created, deflected and deposited on both deflection electrodes. With the use of an atomic force microscope some of the particles could be classified as microparticles. According to the deterministic deflection model they should not have deflected. Combined with the fact that oxygen was in the plasma, due to the oxidation of the electrodes, a hypothesis of bipolar charging was thus proposed. The deterministic deflection model was used and supplemented with field and diffusion charging calculations, to support this hypothesis. A reasonable correlation between the theoretical model and this experimental results was obtained. Based on the arc discharge test, electrostatic precipitation was proposed as the indicated means of scrubbing silver and other particles such as graphite from a helium stream. It is recommended that a new apparatus be built and that the deterministic deflection model be used to predict the deflection of the particles. With this apparatus the uncertainties of breakdown voltage, the effect of thermionic emission and the size of the particles, all of which have been identified as being important, can then also be determined.
AFRIKAANSE OPSOMMING: In die primêre komponente van die kringloop van hoë temperatuurreaktors, was verskillende ongewenste partikels soos grafiet en silwer-110 (110mAg) teenwoordg. Silwer- 110 (110mAg) is radioaktief met ’n halfleeftyd van 253 dae. Vanuit ’n radiasie-risiko oogpunt word daar onderhoudsimplikasies geskep deur die teenwoordigheid van radioaktiewe partikels in die primêre komponente. Die ontwikkeling van ’n metode om hierdie partikels uit die heliumstroom the verwyder was dus nodig. Hierdie tesis ondersoek twee moontlike metodes van verwydering van silwer uit die heliumstroom, naamlik laser-ablasie van mikropartikels en elektrostatiese presipitasie. Hierdie metodes benodig die generasie van silwer ione of gelaaide partikels, die defleksie daarvan in ’n heliumstroom wat deur ’n elektriese veld vloei en die platering van die partikels op defleksie elektrodes. Om ’n geskikte metode the vind wat ione genereer was, verskillende metodes om die silwer ione te verkry, ondersoek en geëvalueer. Hierdie metodes sluit in bestaande ioonbronne, termioniese, veld en fotoëlektriese emissie en laser-ablasie van mikropartikels. Geen ioonbronne was gevind wat gebruik kan word in helium by hoë druk nie. Die gevolgtrekking is gemaak vanaf berekeninge dat termioniese, veld en fotoëlektriese emissie ook nie gebruik kan word om die energie van die voortgebronge elektrone genoeg te verhoog om silwer in ’n heliumstroom te ioniseer nie. Daar was gevind dat hierdie metodes nie geskik is as ioonbronne in helium by hoë druk nie. Daarenteen was laser-ablasie van mikropartikels gevind om ’n geskikte tegnologie voor te stel. Laser-ablasie van mikropartikels was suksesvol deur Nichols et al. (2000) gebruik om silwer nanopartikels te deflekteer in ’n elektriese veld oor helium van twee bar. ’n Apparaat soortgelyk aan Nichols et al. (2000) se eksperiment, was dus ontwerp en gebou. Die apparaat het ’n silwer insitmeganisme bevat en toetse met hierdie apparaat was die mikropartikel toetse genoem. Om die effektiwiteit van die insitmeganisme te bepaal, was toetse gedoen sonder opstelling van die laser. Daar was eksperimenteel gevind dat die laser nie nodig was nie, omdat mikropartikels op beide defleksie elektrodes geplateer het. Dielektroforese was voorgestel as ’n moontlike verduideliking vir deflektering en platering vir die silwer mikropartikels. Om die defleksie van silwer partikels teoreties te moduleer was twee modelle voorgestel, naamlik deterministiese en stogastiese defleksiemodelle. Laasgenoemde beskryf die defleksie van atome, ione en gepolariseerde partikels deur gebruik te maak van waarskynlikheidsteorie. Die stogastiese defleksiemodel dui aan dat die Brownian bewegingskrag veel groter is as die krag wat geskep word deur die polarisasie van ’n atoom as gevolg van ’n elektriese veld. Die deterministiese defleksiemodel beskryf die defleksie van groter partikels in ’n kontiuum. Met hierdie model was gevind dat silwer mikropartikels met ’n radius van 3 mmin ’n heliumstroom van snelheid van 0.0198 m/s, 4.6 mm sal deflekteer per 140 mm van heliumstroom lengte. Dit bewys dat die apparaat wat gebou was, se lengte onvoldoende was om al die silwer mikropartikels te deflekteer en te laat neerslaan. Die dielektroforese krag van nanopartikels kan nie uitgewerk word nie, omdat die dielektroforese model slegs geldig is vir partikels groter as 1 mm. Veranderings was dus aan die apparaat gemaak om nanopartikels te genereer omdat hul mobiliteit hoër is as die van mikropartikels. Die nanopartikels was geskep deur gebruik van ’n boogontlading in helium; daarom was toetse met hierdie gemodifiseerde apparaat die boogontladingstoets genoem. Die nanopartikels wat so geskep was, het gedeflekteer en het op beide elektrodes neergeslaan. Met die gebruik van ’n atomiese krag mikroskoop was dit gevind dat sommige van hierdie partikels mikropartikels was. Volgens die deterministiese defleksiemodel moes hul nie gedeflekteer het nie. Gekombineerd met die feit dat daar, weens oksidasie van die elektrodes, suurstof in die plasma was, was ’n hipotese van bipolêre lading voorgestel. Die deterministiese defleksiemodel is saam met die veld- en diffusielading gebruik om hierdie hipotese te staaf. ’n Redelike korrelasie tussen die teoretiese en eksperimentele data was gevind. Gebaseer op die boogontladingstoets, was elektrostatiese presipitasie voorgestel as ’n metode om silwer en ander partikels soos grafiet uit ’n heliumstroom te verwyder. Daar word voorgestel dat ’n nuwe apparaat gebou word en dat die deterministiese defleksiemodel gebruik word vir die bepaling van defleksie van die partikels. Deur die nuwe apparaat te gebruik kan die onsekerhede van deurslagspanning, effek van termioniese emissie en grootte van die partikels wat geidentifiseer is as belangrik, ook bepaal word.
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PIERPAOLI, MATTIA. "Indoor Air Quality: Study, Optimization and Implementation of a Novel Hybrid Air Cleaning Process." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263266.
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Un’aria salubre è un requisito essenziale, insieme a cibo e acqua. Nonostante gli ultimi due siano stati maggiormente percepiti come prioritari da molte civiltà per diversi secoli, l’aria è un qualcosa di imposto, senza possibilità di scelta. Sin dalla rivoluzione industriale, quando la popolazione iniziò a spendere buona parte del tempo in ambienti confinati, l’aria indoor avrebbe meritato maggiore considerazione, poiché risulta quella a cui essere maggiormente esposti.
Gli inquinanti più comuni possono essere classificati in base alla loro natura: particolata o gassosa. Le strategie convenzionali per rimuoverli sono: rimozione della sorgente, diluzione tramite ventilazione e purificazione dell’aria. Mentre le emissioni indoor sono diffuse e non è sempre possibile isolarle e per ottemperare alle direttive di efficienza energetica, le strategie attive di rimozione degli inquinanti risultano essere preferibili.
Le tecnologie per il trattamento dell’aria indoor vengono classificate in base al tipo di inquinante rimosso: filtri, precipitatori elettrostatici, separatori inerziali e scrubbers vengono generalmente utilizzati per la rimozione di particolato, mentre materiali adsorbenti, (foto)catalizzatori e reattori con lo sviluppo di plasma vengono utilizzati per la rimozione di gas.
In questo studio è stata accuratamente valutata l’applicazione in loco e simultanea di tre diversi processi (adsorbimento, fotocatalisi e precipitazione elettrostatica) per la rimozione aumentata di inquinanti indoor. Per evidenziare le singole sinergie emergenti, e le interazioni tra processi e materiali, sono stati studiati prima i singoli processi accoppiati e, successivamente, l’innovativo processo ibrido risultante dalla loro azione combinata.Clean air is an essential requirement of life, together with food and water. Although the latter two have been a primary concern for many civilizations for multiple centuries, air is something imposed, with no possibility of choice. Since the industrial revolution, as people started to spend most of their time in confined environments, clean air should have been considered a prerogative, as indoor air had become a leading exposure for humans. The most common indoor pollutants can be classified by their form: particulate or gaseous. Conventional strategies to combat the formers are source removal, dilution through ventilation and air treatment. While indoor emissions are ubiquitous and it is not always possible to remove the source, dilution through mechanical and natural ventilation and air cleaners are the generally preferred. As sustainability and energy-efficiency are becoming prerogatives in many countries, ventilation may imply energy losses, and therefore it can not be the only applicable strategy. For these reasons, air cleaners constitute a solution for removing harmful indoor pollutants. Indoor air treatment technologies are classified according to the type of pollutant removed: filters, electrostatic precipitators, inertial collectors, scrubbers are generally used for the removal of particles, while adsorptive media, (photo)catalysts, and plasma-operated reactors are adopted for the removal of gases. In this study, a simultaneous and in situ combination of the three previously reported methods (adsorption, photocatalysis and electrostatic precipitation) was deeply studied for the enhanced removal of indoor pollutants. The synergistic effect between each coupled process was investigated, in order to highlight the novelty of operating photocatalysis, adsorption and electrostatic precipitation in the single hybrid reactor.
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Pawar, Vishal. "Use of laminar ESP for the capture of titanium dioxide particles." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176925565.
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Gunenc, Mehmet V. "Enhanced Charging Sieving Electrostatic Precipitator." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1195594122.
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Morosko, Jason M. "Composite Discharge Electrode for Electrostatic Precipitator." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1173374043.
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Gouri, Rabah. "Optimisation électrique et géométrique d'un électrofiltre à barrière diélectrique en configuration fil-tube carré. Application aux particules submicroniques." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2279/document.
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L'objectif de ce travail est l'étude de l'efficacité de collecte des particules submicroniques d'un électrofiltre deconfiguration fil-tube carré en utilisant une Décharge à Barrière Diélectrique (DBD). Les expériences sont faites avec desparticules de fumée d'encens ayant une taille moyenne d'environ 0,32 pm. La répartition en taille des particules à la sortie del'électrofiltre est mesurée grâce à un spectromètre d'aérosols à lumière blanche. L'efficacité de collecte est estimé pour diversestensions et fréquences appliquées (gammes : 4-30 kV, de 0,3 à 1000 Hz) à un débit d'air fixe.Le premier volet de l'analyse a consisté en une caractérisation électrique et granulomètrique de l'électrofiltre de configurationcarré dit de référence. Les résultats obtenus ont montré que le comportement électrique de l'électrofiltre de géométrie carré estsimilaire à celui de géométrie cylindrique. Aussi, l'utilisation de la DBD pour la précipitation donnait de très bons résultats enconfiguration fil-tube carré (plus de 99% d’efficacité). Le second volet de notre étude a été consacré à l'optimisation géométrique de l'électrofiltre de référence. Les résultats ont montré que le diamètre du fil, le nombre des faces collectrices ont une influence minime sur la précipitation. Tandis que, la section du tube et la largeur de la contre électrode et sa discrétisation ont une influence importante. L'analyse de l'effet de la présence d'une deuxième Barrière Diélectrique (BD) a montré qu'à la différence de la simple BD ou le mode de décharge est assez homogène, la décharge a un comportement filamentaire dans le cas de la double BD. Aussi, l'efficacité de collecte des particules pour les deux conThe objective of this work is the study of the collection efficiency of submicron particles with wire-to-square tubeElectroStatic Precipitator (ESP) using a Dielectric Barrier Discharge (DBD). The experiments are performed with incense smokeparticles having a mean size of about 0.32 μm. An aerosol spectrometer is employed for characterizing the size distribution ofthese particles at the outlet of the ESPs. The collection efficiency is estimated for various applied voltages and frequencies(ranges: 4–30 kV, 0.3–1000 Hz) at a fixed air flow rate.The first step of our study consisted of an electrical characterization of the reference precipitator and the evaluation of itscollection efficiency performances. The results have shown that electrical behavior of the wire-to-square tube configuration issimilar to the wire-to- cylinder configuration. Furthermore, it reveals that the square configuration charged with a DBD gives verygood results (more than 99% of efficiency). The second step of the study was devoted to the geometrical optimization of thesquare ESP. The obtained results have established that the wire diameter, the number of faces has a minimal effect on electrostatic precipitation. However, the tube section, the width of the ground electrode and its discretization have an important effect. Also, the analysis of the effect of the presence of a second Dielectric Barrier (DB) has shown that in the case of the single DB, the discharge mode is rather homogeneous. In contrast, the discharge has a filamentary behavior in the case of the double DB. Results show that the particle collection efficiency of both ESPs is higher at high applied voltages and within a certai
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Bharmal, Huzefa A. "Performance Evaluation of Wet Metal Plate Electrostatic Precipitator." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1133462252.
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Khan, Zahirul Hasan. "Bench- and Pilot-Testing of Sieving Electrostatic Precipitator." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1177721692.
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Al-Majali, Yahya T. "Novel Hybrid Composite Discharge Electrode for Electrostatic Precipitator." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1492188040079733.
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Lutfullaeva, Anbara. "Wet Electrostatic Precipitator, Increasing the Efficiency of Collecting Dust Particlesthrough Vibrating Precipitator Analysis." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1584444404824906.
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Souakri, Sonia. "Optimisation des performances d'un procédé industriel d'électrofiltration alimenté par hautes puissances pulsées." Thesis, Pau, 2016. http://www.theses.fr/2016PAUU3028/document.
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La lutte contre la pollution atmosphérique est un enjeu majeur de ce XXIème siècle. Le centre deMarcoule du CEA développe différents procédés de traitement de déchets issus du nucléaire parincinération/vitrification qui génèrent des gaz de combustion nécessitant un traitement. Pour cefaire, le CEA utilise la précipitation électrostatique, technique de traitement d’effluents gazeuxemployée pour la filtration des particules fines.Cette thèse est consacrée à l’optimisation des performances d’un électrofiltre alimenté parhautes puissances pulsées. L’un des objectifs est de dimensionner et réaliser une nouvelle électrodeémissive adaptée au développement d’un nouveau procédé d’incinération. Cette nouvelle électrodecouplée à son alimentation HT, dont les paramètres électriques ont été optimisés, ont permisd’obtenir des rendements de filtration maximum durant des temps de fonctionnement enadéquation avec des applications industrielles. L’impact des caractéristiques physico-chimiques despoussières sur l’efficacité de filtration a été analysé.Une étude spécifique a également porté sur l’évolution des différents régimes de décharge quise développent dans l’électrofiltre de manière à identifier les phénomènes responsables de la chuted’efficacité du procédé. Les bénéfices de l’électrode émissive et d’un générateur hybride, combinantdes impulsions de tension superposées à un fond continu, ont clairement été mis en évidence parleurs effets sur l’initiation des "back corona" et par conséquent sur la durée de fonctionnement àrendement optimalThe fight against air pollution is a major issue in the twenty-first century. The center of Marcouleof CEA develops different waste treatment processes by incineration / vitrification that generatecombustion gases requiring treatment. To do this, the CEA uses the electrostatic precipitation, atechnical waste gas treatment employed for thin particles filtration.This thesis is dedicated to optimizing the performance of an electrofilter supplied by high pulsedpowered. One of the goals is to size and achieve a new emissive electrode adapted to thedevelopment of a new incineration process. This new electrode coupled to its High Voltage (HV)power supply, which electrical parameters were optimized, allowed to obtain maximum filtrationefficiency during operating times in line with industrial applications. The impact of thephysicochemical characteristics of dusts on the filtration efficiency was analyzed.A specific study also focused on the evolution of different discharge conditions that develop inthe electrofilter to identify the phenomena responsible for the process efficiency fall. The intake ofthe emissive electrode and a hybrid generator, combining a continuous background voltagesuperimposed with impulses, has clearly been demonstrated by their effects on back coronainitiation and therefore on the optimal efficiency operation duration
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Eboreime, Ohioma. "Numerical Modeling of the Novel Cross-Flow Electrostatic Precipitator." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1575646113189561.
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Ong, Chun Hoe. "Electrostatic precipitator to collect large quantities of particulate matter." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5976.
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Traditional aerosol samplers are limited in their abilities to collect large quantities of particulate matter due to their low flow rates, high pressure drops, and are noise intrusiveness. The goal of this study was to develop an alternate aerosol sampler using electrostatic precipitation technology that was safe and not noise intrusive to be deployed in homes. The O-Ion B-1000 was selected as the most suitable electrostatic precipitator (ESP) for achieving the goal of this study because of its affordability, the design of its collection electrode and its high flow rate. The collection efficiency of the ESP was assessed for three aerosols; Arizona Road Dust (ARD), NaCl and diesel fumes. ARD was found to have the highest average collection efficiency (65%) followed by NaCl (43%) and lastly diesel fumes (41%).
A method for recovering the particulate matter deposited on the collection electrode was developed. The dust collected on the electrode was recovered onto polyvinyl chloride (PVC) filters moistened with deionized water. Additionally, the recovery of the three test aerosols, ARD, NaCl, and diesel fumes, from the collection electrode was assessed. A gravimetric analysis was done to determine the amount of dust recovered. The collection efficiency was used to calculate the amount of mass expected on the filter for a particular aerosol. NaCl had the highest recovery at 95% recovery, followed by ARD (73%) and lastly diesel fumes (50%). Two identical ESPs were also deployed in an office and in a bedroom, 104.47 mg and 9.64 mg of particulate matter (PM) was recovered respectively.
The noise and ozone level produced by the ESP was evaluated to determine the ESP’s viability as a household aerosol sampler. The ESP’s high setting had a noise level of 45.8 dB and ozone generation rate of 0.036 mg/min. The results of the calculation showed that in an averaged size unventilated room (6.10 m × 6.10 m × 2.44 m), it would take 6 hours and 53 minutes for the ozone levels to reach the recommended maximum exposure limits per National Ambient Air Quality Standards (NAAQS). Additionally, a ventilation of 230 L/min is needed in order to prevent the ozone levels generated by the ESP from exceeding maximum exposure limits per NAAQS.
Overall, the O-Ion B-1000 met the criteria of collecting 1 mg of PM in a 24 hour sampling for ARD and NaCl. Diesel fumes however, required 30 hours to collect 1 mg of PM. The noise levels generated by the ESP set on high was one dB above the Environmental Protection Agency (EPA) standards for indoor noise limit. However, the noise is proportional to inverse distance squared; the ESP should not pose a problem during household deployment. Ozone generated by the ESP was also found to be below 0.07 ppm as set by the EPA with an average ventilation of 230 L/min. The average ventilation of a household is 1500 L/min, thus the ozone generated by the ESP would not surpass 0.07 ppm. However, the ESP should not be deployed in unventilated rooms for a period of more than 6 hours and 53 minutes.
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Mannella, Nikolas E. "Design, Manufacturing, and Testing of a Pilot Wet Electrostatic Precipitator." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1492558871480272.
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Shah, Hardikkumar G. "PERFORMANCE EVALUATION OF WET PLATE ESP FOR SUB-MICRON PARTICLES." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1141954317.
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Ettori, Maxime Philippe. "A new electrostatic precipitator for breath-borne aerosol: preliminary study and tests." Thesis, KTH, Mikro- och nanosystemteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117737.
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The goal of this master thesis was to preliminary study, design and test a new electrostatic precipitator (ESP) for the capture of human breath-borne aerosol. This system needs to collect aerosolized bacteria/viruses in exhaled droplets, while being compatible with an open interface micro-fluidic system, in which an integrated bio-sensor will detect their presence. The final system may constitute an efficient point-of-care test for lower respiratory tract infection diagnoses. The number of exhaled droplets and the amount of pathogenic material being extremely low, the system needs to provide a high collection efficiency, while being compatible with the technologies used in a point-of-care test.In this work, a thorough study of the state-of-the-art in particle collection systems is presented, as well as theories needed for the conception of an ESP. Based on this knowledge, the main features and solutions were chosen and integrated in a conceptual design of a novel ESP. COMSOL simulations were performed to guide the design of the collection system. A specific simulation code was written to simulate the droplets motion inside a highly simplified ESPmodel. Thereafter, an experimental setup was build, and several configurations of ESP were tested. The efficiency of each configuration was assessed by quantifying the amount of dye, initially dissolved in the dispensed liquid, collected by the ESP. An impinger, placed at the setup outlet, is used to quantify the losses inside the system.Three configurations of ESP were tested, and their collection efficiency analyzed. The best experiment has shown a very promising net collection efficiency of 45%. Conclusions were drawn from the three systems. Even though the ESP system has not met all the specifications, this preliminary study was successful.Finally, guidelines for the creation of a more efficient ESP, and for tests with pathogenic material, could be proposed.
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Potrymai, Eduard, and Ivan Perstnov. "Time Dependent Modelling and Simulation of the Corona Discharge in Electrostatic Precipitators." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-33293.
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Corona discharge is one of the crucial problems related with high-voltage equipment. This paper focuses on the physical and numerical modelling of corona discharge in an Electrostatic precipitator (ESP). The model is based on Maxwells equations and the Finite element method (FEM) and is implemented with the COMSOL Multiphysics software.The simulation allows studying the electric charge distribution and the behaviour of the electric field inside the ESP. The work is focused primarily on time-dependent studies of the corona discharge.
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Ramamoorthy, Thiagarajan. "Mechanical Behavior of Membranes in Electrostatic Precipitators." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1125868299.
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Basu, Sreerupa. "A Quantitative Study of the Chlorine Atom Concentration in Plasma." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1204918172.
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SAIYASITPANICH, PHIRUN. "CONTROL OF DIESEL PARTICULATE AND GASEOUS EMISSIONS USING A SINGLE-STAGE TUBULAR WET ELECTROSTATIC PRECIPITATOR." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163607234.
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Telenta, Marijo. "AEROSOL CALCULATION AND PRESSURE DROP SIMULATION FOR SIEVING ELECTROSTATIC PRECIPITATORS." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1172857667.
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Li, Ke. "Experimental and theoretical study of sub-micron aerosol collection efficiency by Laminar Wet-Membrane electrostatic precipitator." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1177439835.
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Liao, Bo. "The Membrane Vibration and the Dust Removal Efficiency of the Membrane Based Electrostatic Precipitator." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1057000743.
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Valavala, Pavan Kumar. "Uniaxial Tensile and Creep Behavior of Omnisil Membranes in Membrane Based Wet Electrostatic Precipitator." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1129144907.
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Jayaram, Varalakshmi. "Capture of Elemental Mercury in a Wet Membrane Plasma Enhanced Electrostatic Precipitator using Hydrochloric Acid as the Reagent Gas." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1133356270.
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Yatavelli, Laxmi Narasimha R. "Capture of Soluble Mercury Using Membrane-Based Wet Electrostatic Precipitator as a Function of Temperature." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1126909697.
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Aba'a, Ndong Arthur. "Décharges à barrière diélectrique pulsées de volume et de surface appliquées à la précipitation électrostatique et à la régénération de surface." Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2322/document.
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Dans le cadre de cette thèse, des Décharges à Barrières Diélectrique (DBD) pulsées de volume et de surface ont été étudiées expérimentalement, dans le but de les appliquer respectivement à la précipitation électrostatique de particules submicroniques et à la régénération de surface.La caractérisation des DBD pulsées a consisté à effectuer des mesures électriques (courant, énergie) et optiques (imagerie ICCD), afin d'observer l'influence des paramètres électriques et géométriques, ainsi que des matériaux utilisés, sur les propriétés de la décharge. Il en ressort que pour les deux types de DBD (surface et volume), le courant présente deux pics durant les fronts montant et descendant du pulse de tension, et que les deux décharges ont des aspects différents (filamentaire ou diffus).Concernant la précipitation électrostatique, l'efficacité de collecte des électrofiltres a été déterminée par des mesures granulométriques. Les résultats montrent que celle-ci est influencée par les paramètres électriques et géométriques des électrofiltres. Une caractérisation des phénomènes EHD au sein des électrofiltres par métrologie optique (LDV et PIV) a été effectuée afin de comprendre les mécanismes de charge et de dérive des particules.Ensuite, la régénération de surface a été étudiée en analysant les images de la surface polluée, avant et après le traitement. Les résultats révèlent que les performances de la régénération sont influencées par les paramètres électriques, géométriques et les matériaux des réacteurs DBD. Les mécanismes de la régénération ont été analysés en relevant l'évolution de la taille et la concentration des particules générées lors du processus de régénérationAs part of this thesis, volume and surface pulsed Dielectric Barrier Discharges (DBD) were investigated experimentally for applications in the electrostatic precipitation of submicron particles and surface regeneration, respectively. First, the characterization of pulsed DBDs consisted of performing electrical measurements (current, power) and optical measurements (ICCD imaging) in order to observe the influence of electrical and geometrical parameters as well as materials on the properties of the discharge. It is demonstrated that for both types of DBD (surface and volume), the current has two peaks during the rising and falling times of the voltage pulse, corresponding to distinct streamer and glow discharge regimes, respectively.Next, the collection efficiency of electrostatic precipitation (ESP) was determined by granulometric measurements. The results show that the efficiency is influenced by the electrical and geometrical parameters of the precipitator. A characterization of EFD phenomena was performed inside the precipitator by optical metrology (LDV and PIV) to understand the mechanisms of charge and particle drift. Finally, surface regeneration was investigated by analyzing images of the contaminated surface, before and after treatment. The results reveal that the regeneration process is influenced by electrical and geometrical parameters and DBD reactor materials. The mechanisms of regeneration were analyzed in-situ by measuring changes in the size and concentration of the generated particles during the process of regeneration
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Pardon, Gaspard. "From Macro to Nano : Electrokinetic Transport and Surface Control." Doctoral thesis, KTH, Mikro- och nanosystemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144994.
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Today, the growing and aging population, and the rise of new global threats on human health puts an increasing demand on the healthcare system and calls for preventive actions. To make existing medical treatments more efficient and widely accessible and to prevent the emergence of new threats such as drug-resistant bacteria, improved diagnostic technologies are needed. Potential solutions to address these medical challenges could come from the development of novel lab-on-chip (LoC) for point-of-care (PoC) diagnostics. At the same time, the increasing demand for sustainable energy calls for the development of novel approaches for energy conversion and storage systems (ECS), to which micro- and nanotechnologies could also contribute. This thesis has for objective to contribute to these developments and presents the results of interdisciplinary research at the crossing of three disciplines of physics and engineering: electrokinetic transport in fluids, manufacturing of micro- and nanofluidic systems, and surface control and modification. By combining knowledge from each of these disciplines, novel solutions and functionalities were developed at the macro-, micro- and nanoscale, towards applications in PoC diagnostics and ECS systems. At the macroscale, electrokinetic transport was applied to the development of a novel PoC sampler for the efficient capture of exhaled breath aerosol onto a microfluidic platform. At the microscale, several methods for polymer micromanufacturing and surface modification were developed. Using direct photolithography in off-stoichiometry thiol-ene (OSTE) polymers, a novel manufacturing method for mold-free rapid prototyping of microfluidic devices was developed. An investigation of the photolithography of OSTE polymers revealed that a novel photopatterning mechanism arises from the off-stoichiometric polymer formulation. Using photografting on OSTE surfaces, a novel surface modification method was developed for the photopatterning of the surface energy. Finally, a novel method was developed for single-step microstructuring and micropatterning of surface energy, using a molecular self-alignment process resulting in spontaneous mimicking, in the replica, of the surface energy of the mold. At the nanoscale, several solutions for the study of electrokinetic transport toward selective biofiltration and energy conversion were developed. A novel, comprehensive model was developed for electrostatic gating of the electrokinetic transport in nanofluidics. A novel method for the manufacturing of electrostatically-gated nanofluidic membranes was developed, using atomic layer deposition (ALD) in deep anodic alumina oxide (AAO) nanopores. Finally, a preliminary investigation of the nanopatterning of OSTE polymers was performed for the manufacturing of polymer nanofluidic devices.QC 20140509
Rappid
NanoGate
Norosensor
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Ahmad, Muhammad, and Jhanzeb Jhanzeb. "Modeling and Simulation of an Electrostatic Precipitator Including a Comsol Multiphysics Guide for Modeling an ESP." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-10685.
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Gaseous exhaust of different industries contains dust particles of different chemical precipitates that are harmful for the environment. Electrostatic Precipitators are very often used in industries to filter their gaseous exhaust and to prevent the atmosphere to being polluted. Electrostatic Precipitators are very efficient in their work. Electrostatic Precipitators use the force of the electric field to separate the dust particles from gaseous exhaust. Electrostatic Precipitators charge the dust particles and remove these particles by attracting these charged dust particles toward the collecting plates. The charging of dust particles requires a charging zone. When gas passes through that charging zone, the dust particles in the gas stream become charged and then these charged particles are attracted toward the collecting plates. The design of an Electrostatic Precipitators requires the knowledge of its working principle and the problems that often arise during its working. This thesis is the study of the working and the problems of the Electrostatic Precipitators. The main reason for problems in working of an Electrostatic Precipitator is the dust resistivity. This dust resistivity affects the collection performance of an Electrostatic Precipitator. This thesis also contains the simulation of an Electrostatic Precipitator. In the simulation part, the Electric Potential and the Electric Field of an ESP is modeled in an ideal condition, when no gas is flowing through the ESP. The industrial software Comsol Multiphysics is used for the simulation. A Comsol Multiphysics guide is given in appendix of this thesis report that provides information about using this software.
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Vijapur, Santosh H. "Design Optimization and Experimental Study of a Wet Laminar Electrostatic Precipitator for Enhancing Collection Efficiency of Aerosols." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1227020758.
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