Electrostatic precipitation of fine airborne particles and biological decontamination : efficiency and energy consumption tendencies

  • Yihan Liu

Student thesis: Doctoral Thesis

Abstract

Particulate matter poses serious health problems to human beings. Electrostatic precipitation, which utilises high voltage energised plasma, has been proved to be one of the most effective and efficient method to solve the problems caused by particulate matter. However, there are issues of the electrostatic precipitation which have been noticed. One of the most critical issues of the electrostatic precipitation is the efficiency. There are two meanings of the efficiency, which are particulate matter precipitation efficiency and energy using efficiency.There are reports that the electrostatic precipitation in certain cases is with low particulate matter precipitation efficiency and high energy consumption. Therefore, the first objective of this thesis is to solve the problems of low efficiency and high energy consumption. The first solution is to design and develop a novel system with unique topology, which is the hypodermic needle-mesh system in this thesis. The second solution is to make suggestions on the electrostatic precipitation system which has already been widely used (coaxial topology).The two suggestions are the increase of electrostatic precipitation stage and the increase humidity of the inner environment. Both solutions have been compared with typical state-of-the-art researches and both solutions have been proven to be with high precipitation efficiency and with low energy consumption.In addition to the electrostatic precipitation effect by plasma, the effect of biological decontamination by plasma has also been investigated. A biological decontamination system has been designed and developed. The objective of the research is not only to control particulate matter, but also to decontaminate pathogenic microbes.Finally, a model which is able to simulate particle dynamics in electrostatic precipitators and calculate particle collection efficiency has been designed. The model has considered the parameters which are neglected by classical approaches and is more accurate. The particle dynamics characteristics and the particle collection efficiency influenced by the dynamics can be used to make suggestions to the electrostatic precipitators in practice.
Date of Award1 Oct 2015
LanguageEnglish
Awarding Institution
  • University Of Strathclyde
SponsorsUniversity of Strathclyde
SupervisorIgor Timoshkin (Supervisor) & Scott MacGregor (Supervisor)

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