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Gasoline Particulate Filters
Kadlček, František ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This research deals with particulate matter, its origin and harmfulness, focusing on filters that trap these carcinogenic particles from exhaust gases. The work also lists emission stand-ards that affect the requirements for filtering efficiency of the equipment. Furthermore, the functions of specific components are described and the principle of filter regeneration is explained.
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Diesel Particulate Filters
Haratek, Marek ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is focused on creation of particulate matter during combustion in diesel engines and their trapping in DPF systems. The first part deals with particulate matter and emission standards in Europe and USA. There is described filtration principle, types of regeneration and DPF variants in the second part. Afterwards the thesis is concentrated on particular DPF system applications used by representative car makers and there is also introduced range of products of some diesel particulate filter manufacturers, including description of construction variants and used regeneration technologies.
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The effect of lubricant contamination and degradation on lubricating film behavior
Strnad, Jan ; Dzimko, Marián (referee) ; Omasta, Milan (advisor)
Lubrication contamination and degradation is one of the major causes of unexpected failure of tribological nodes. As a result, different levels of maintenance are introduced in practice, leading to a longer service life of the lubricated node. These systems often include sophisticated on-line diagnostic tools that can be used to evaluate a sample of a lubricant using certain variables such as viscosity, number of particles, humidity, dielectric constant, etc. Based on changes of these variables some systems can make corrective measures such as filtering or complete replacement of lubricant. Therefore, the aim of this experimental thesis is to determine the influence of lubrication contamination (solid particles, moisture) and degradation (oxidation) on the lubricating film behavior with respect to its limit bearing capacity. To examine the thickness of the lubricating film, friction and wear, an optical and MTM tribometer, in the ball-on-disc configuration, was used.
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The DPF and SCR systems
Novodomský, Tomáš ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
The presented bachelor thesis deals with exhaust emission reducing systems for diesel engines. The first part is devoted to the composition of exhaust gases and emission standards. The thesis analyses the formation of solid particles, their regulation by the DPF system and its various variants. Further the principle of reducing the nitrogen oxide content in the exhaust gases by the selective catalytic reduction system is described. In the final part, there is a reflection on the future of emission reduction systems, emission standards and alternative drives.
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The concentration of particulate matter in the air of selected areas of the city of Brno and its health risks
Bulejko, Pavel ; Čáslavský,, Josef (referee) ; Adamec, Vladimír (advisor)
Tato práce se zabývá znečištěním ovzduší pevnými prachovými částicemi v lokalitách města Brna. V teoretické části je pojednáno o možných zdrojích prachových částic, o chemickém složení a velikostní klasifikaci polétavých částic a dalších fyzikálně-chemických charakteristikách. Další část je věnována zdravotním rizikům prašnosti. V této souvislosti práce pojednává o anatomii dýchacího systému a účincích prachu na něj. Jsou taktéž rozebrány zdravotní efekty prachového znečištění, včetně uvedení možných nemocí respiračního a kardiovaskulárního systému, jejichž může být prach příčinou. V praktické části byl proveden sběr prachu. Byly vybrány celkem čtyři lokality, kde byly prováděny odběry vzorků. Následně byly stanoveny koncentrace polétavých částic PM10 a PM2,5. Dále byly u vybraných lokalit stanoveny koncentrace těžkých kovů a polyaromatických uhlovodíků vázaných na prachových částicích. V závěru bylo provedeno srovnání s legislativou a stanovena zdravotní rizika.
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Stress-strain Analysis of Diesel Particulate Filter Support on Tractor Zetor Forterra
Kučera, Petr ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
The subject of this master's thesis is the FEM analysis of the construction of the diesel particulate filter support on the tractor Zetor Forterra. The introduction of this thesis is about the theoretical part dealing with the issue of emissions from diesel engines and ways to reduce them. The following part describing the creation of the computational model. Then, the static stress-strain analysis, modal analysis and fatigue analysis are solved in the ANSYS Workbench software. The assessment of the safety of the structure in terms of limit states, that may occur during the operation of the tractor, based on the results of calculations is in the conclusion of the thesis.
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Influence of traffic volume and meteorological conditions on the air pollution
Vojtěchová, Ivana ; Kotlík, Josef (referee) ; Adamec,, Vladimír (advisor)
Transport, whose intensity year by year increase, has assuredly influence on air quality. This issue solution will be focused especially on localities burden with transport in urban areas. The contribution of transport to increased values of air pollution will be evaluated with regards to meteorological conditions. Background stations from Czech Hydrometeorological Institute categorization will be chosen such as comparative sites. Pollutants emitted from traffic such as particulate matter, nitrogen oxides and carbon monoxide will be observed except meteorological conditions.
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Technology sputtering of flue-gas
Hladík, Petr ; Brázdil, Marian (referee) ; Hrnčířová, Michaela (advisor)
The object of this bachelor’s thesis is to create a research in field of flue gas scrubbing technology. In the first part, there are briefly outlined issues of size and shape of particles present in flue gas after combustion. Next part focuses on basic general characteristics of separators. Main part treats of individual types of separators. Following chapters deal with emission limits in Czech Republic and future development of the field. Thesis is concluded by sample calculation of the cyclone separator.
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