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Statistical Analysis of Air Pollution by Selected Pollutants
Pernicová, Veronika ; Durnová, Markéta (referee) ; Balgová, Zuzana (advisor)
This thesis analyses an occurrence of detected pollutant concentrations of nitrogen oxides, dust particles of the size od 10 and 2,5 m and ground ozone in years 2015-2019 in seven chosen locations in Brno agglomeration. In the introduction, the thesis describes basic terms, the issues of air pollution and relevant legislation. Individual pollutants are defined and also their effect on environment and human health. After that, the locations of Brno, for which the analysis is made, is specified. The dynamics of development of individual pollutants is shown through a statistical analysis of individual time lines. The analysis also focuses on the difference in the level of pollution during weekdays, holidays, seasons or rush hour. The quantities are also viewed from the point of view of the relevant air pollution limits and the influence of climatic factors, which significantly affect their concentrations.
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Adaptive Model for Simulation of Atmospheric Pollution
Pazúriková, Jana ; Šátek, Václav (referee) ; Dvořák, Radim (advisor)
Air pollution harms the environment and human welfare. Computer models and their simulation are useful tools for deeper understanding of processes behind as they quite accurately represent the dispersion and transformation of pollutants with advection diffusion equation or by other concepts. Current models give valid results only to constrained cases of initial conditions. The general model combining the several specific models which is able to change according to input parametres and improve with training is proposed. The adaptiveness of the system is provided by decision tree as data structure with information for selection and combination process and genetic algorithm as optimization method for adjusting the tree. The evaluation of implemented system proves that the combination of models gives better results than models themselves. Even with simple specific models, the system has achieved results comparable to state-of-art models of air pollution.
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Methods for the reduction of nitrogen oxides
Šimeček, Radek ; Hudák, Igor (referee) ; Bělohradský, Petr (advisor)
This Bachelor’s thesis deals with methods for the reduction of nitrogen oxides during industrial combustion. In the chapter relating to legislation are summed up the limits for stationary sources of pollution valid in the Czech Republic, further are stated the legislative tools for reducing and monitoring emissions. The next part contains an overview of primary and secondary methods for reducing NOx emissions, including pros and cons of the methods. Finally, a simulation in software ChemCAD is carried out, demonstrating the influence of combustion air temperature and flue gas recirculation on parameters of combustion.
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Shale gas extraction
Podhorský, Jakub ; Brázdil, Marian (referee) ; Šnajdárek, Ladislav (advisor)
This bachelor’s thesis on Shale gas extraction describes extraction and world shale gas resources. At the beginning it provides introduction to the terms of geology and overview of historical evolution of extraction and crucial technologies that are currently used in extraction. Shale gas exploration and extraction development is briefly mentioned. Horizontal drilling and hydraulic fracturing is then further described and also summary of the equipment is provided. Potential environmental risks associated with extraction or hydraulic fracturing itself are described. Subsequently world shale gas resources and potential extraction places are described. World technically recoverable resources are estimated at 7245 Tcf. Shale gas commercial production is currently underway in the United States, Canada and China.
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Air contaminants separation process
Krištof, Ondřej ; Pekař, Miloslav (referee) ; Svěrák, Tomáš (advisor)
The Diploma thesis is focused on the separation of gaseous pollutants from contaminated mixtures of gases into liquids using absorbent device. The theoretical part is mainly concerned with describing the absorption process, the method expression and the factors influencing the rate of transfer of contaminants between phases. The experimental part deals with the dependence of transfer of carbon dioxide contained in an air mixture into an aqueous solution of sodium hydroxide on the process conditions of separation in pilot scrubber.
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Cinema air conditioning
Ilko, Miroslav ; Jelínek, Ondřej (referee) ; Rubina, Aleš (advisor)
The bachelor's thesis deals with the design of an air-conditioning system in selected areas in a cinema building. There are designet two air-conditioning units. Equipment No. 1 provide the air quality in the cinema hall, in the sound engineer's room and in the projection room. Equipment No. 2 provide the air quality in the cinema facilities, intended mainly for visitors. The devices are designed to meet hygiene, operational and safety requirements and to provide optimal microclimatic conditions. The air conditioning system ensure the coverage of heat losses and profits, the supply and exhaust of fresh air in the premises. The theoretical part of the work is focused on air filtration.
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Measurement of of atmospheric pollution
Dohnal, Jan ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This thesis deals with methods of measuring air pollution for gaseous substances. It contains a theoretical analysis of various types of pollution. Classification of pollution sources according to several criteria. It focuses on the creation, harm, use of carbon monoxide and carbon dioxide associated therewith. Analysis of various methods of detection for both gases.
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Dispersion studies for logistic problems
Dvořáček, Jan ; Šomplák, Radovan (referee) ; Pavlas, Martin (advisor)
Presented diploma thesis deals with the application of dispersion modelling of emissions from stationary sources of pollution as a potential tool which can be used for data preparation in reverse logistic models. In this case, the stationary source is represented by a waste-to-energy plant. The thesis consists of two main parts -- theoretical and computational. Firstly, emission sources and pollutants originating in thermal waste treatment are discussed. In the second chapter, legislation linked to the problem of air pollution is listed and the topics of current air quality in the Czech Republic and dispersion studies are outlined. Closing section of the theoretical part provides information about the principals of dispersion calculations and classification of dispersion models is given. In the computational part, the used dispersion software SYMOS'97 is introduced and the series of conducted calculations is presented. The calculations investigated the influence of plant capacity, dispersion conditions and terrain on the results. The input data of plant capacity and wind rose were indicated as key parameters in the calculation. The final evaluation revealed a good potential of the used dispersion model as a support tool in reverse logistic models.
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Analysis of air quality around selected energy devices
Páll, Marek ; Ondroušek, Luděk (referee) ; Ptáček, Michal (advisor)
My thesis deals with analysis of air quality close to power devices and with rating of emissions caused by these devices. In the work there are listed laws and regulations, which relate to the rating of indoor and outdoor air quality. Further, there is a briefly clarified problem of pollution, outdoor air pollution and methods of measurement of pollutants. Main characteristics of workplace climatic conditions and their permissible limits are classified and characterized. Areas where the analysis was done are specified and there is mentioned a brief course of the measurement. In further parts are stated results of measurements done close to the boiler, where natural gas is burned, and a boiler, where wood chips are burned. The last part is dedicated to evaluation of emissions measurement results.
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