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Multi-stage impactor
Kojecký, Dalibor ; Sitek, Tomáš (referee) ; Pospíšil, Jiří (advisor)
This master’s thesis is focused on the problem of laboratory capture of fine particles by the impaction method. The introductory chapter is devoted to the investigation of fine particles in air and the impact of air pollution on humans and the environment. The second chapter intro-duces the history of impaction devices, describes the principles of the cascade impactor, and explains the theory behind fine particle capture by changing the direction of the airflow carrying the particles and their capture when they hit a solid wall. In the practical part of the thesis, a computational procedure is developed using the Python programming language for a custom design of a multi-stage impactor. The parameters obtained from the developed computational software are compared with those of a commercial impactor available at the faculty of the school. According to the developed computational procedure, a custom multi-stage impactor is designed for particle separation in the range of PM0.5 to PM0.1.
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Design of an impactor for fine particle separation
Rigby, Jakub ; Sitek, Tomáš (referee) ; Pospíšil, Jiří (advisor)
This bachelor thesis follows up fine particle separation issue with use of impaction method. The introduction is focused on main air pollutants. Closely the solid pollutants and their properties such as formation principle, legislation and human health impact are showed. Following parts describes methods of fine particle capture and closer is focused on impaction method. In the experimental part of this thesis main dimension calculation, construction and manufacturing process of virtual impactor is presented. Several construction and material types of virtual impactor has been fabricated. Finally, a separation efficiency measurement was made. This measurement confirms properties of PM2,5 and PM10 virtual impactor.
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Design of an impactor for fine particle separation
Rigby, Jakub ; Sitek, Tomáš (referee) ; Pospíšil, Jiří (advisor)
This bachelor thesis follows up fine particle separation issue with use of impaction method. The introduction is focused on main air pollutants. Closely the solid pollutants and their properties such as formation principle, legislation and human health impact are showed. Following parts describes methods of fine particle capture and closer is focused on impaction method. In the experimental part of this thesis main dimension calculation, construction and manufacturing process of virtual impactor is presented. Several construction and material types of virtual impactor has been fabricated. Finally, a separation efficiency measurement was made. This measurement confirms properties of PM2,5 and PM10 virtual impactor.
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