Patent ID: 8521455
Filing Date: 2013-08-27
Classification: B03C

Abstract:
1. A computer-implemented method for estimating corona power loss in a dust-loaded electrostatic precipitator, comprising the steps of: computing a total current density vector, calculation of the total current density vector including an ion charge density component for ions and a particle charge density component for particles; numerically solving Poisson's equation and current continuity equations in which a finite element method (FEM) and a modified method of characteristics (MMC) are used, the numerical solution including the total current density vector calculation over a plurality of finite element nodes; defining characteristic lines following a Finite Element grid pattern, thereby resulting in fast convergence and reduced computational time; computing corona current and current density based on the steps of numerically solving the describing equations; generating an FE boundary fitted grid matched to geometry of the dust-loaded electrostatic precipitator, wherein the grid is generated from intersection of field lines, the field lines emanating from M nodes selected on a circumference of a discharging conductor of the electrostatic precipitator, and N equipotential counters; calculating a particle charge density ρ for particles having a relative permittivity of ε, S p represents the particle's specific surface, and E represents the electric field at the node, wherein the particle's specific surface S p is calculated as S p =4Πa 2 N p , where a is a radius of the particle and N p represents particle concentration; and calculating particle mobility k