Date of Award
Doctor of Philosophy
In this work, one of the objectives was to present a method based, on the charge simulation technique, that accurately evaluates the electrical parameters in duct-type precipitators. The method is intended to be applicable to variable physical dimensions of the precipitator as well as to account for a wide range of operating conditions, particularly dust loading conditions.;The charge simulation technique was choosen following a literature survey and analysis for the different methods available for evaluating the electrical parameters of duct-type precipitators. This survey included the approximate analytical methods of P. Cooperman, G. Cooperman and conformal transformations as well as the numerical methods of finite difference and finite element.;In choosing the charge simulation method, the author developed a procedure for adapting this technique to solve problems that in general involve space charge of unknown distributions.;Computer models based on the charge simulation technique are developed to simulate different operating conditions in cylindrical precipitators. These models were developed with the intent of checking the validity and the accuracy of applying the charge simulation technique to this geometry. Later these models were extended to the more complex duct-type geometry.;For the duct geometry, the corona in clean air model shows good agreement to the published experimental work of Penney, Felici and Tassicker.;Another objective of this work was to investigate the enhanced performance of wide-duct spacing precipitators compared to standard duct spacing. Since no experimental data was found in the literature concerning the electrical parameters of wide duct spacing precipitators, it was decided to design and construct a laboratory scale electrostatic precipitator of variable duct spacing. Experiments were carried out to measure the current density and electric field distributions at the collecting plates for several duct spacings.;Finally, a corona quenching model was developed for the duct geometry. This model was also used in the study of wide duct spacing precipitators.;The results of this study show that the technique is suitable for the purpose of accurately predicting the electrical characteristics of electrostatic precipitators under variable operating conditions.
Elmoursi, Alaa Abdel-azim, "Charge Simulation Technique As Applied To Electrostatic Precipitators" (1985). Digitized Theses. 1408.