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Seawater desalination
Kamenický, Robin ; Hájek, Zdeněk (referee) ; Maar, Tomáš (advisor)
Každodenní nedostatek pitné vody vede ke snahám tento problém řešit. Jedna z možnosti je odsolování ať už destilační, za pomoci membrán a osmózy, či dalších nekonvenčních způsobů jako je zmražení vody. Tato práce se zabývá možnostmi odsolování. Popisuje způsoby destilační, reverzní osmózu, solární odsolování a nezapomíná ani na separaci pitné vody pomoci zmražení. Spolu se získáváním pitné vody ze slané nastává také otázka energetických zdrojů. Využití fosilních paliv, obnovitelných zdrojů energie a jaderné energie, je tedy další nepostradatelné téma popisované v této práci. V neposlední řadě se zde také můžete dočíst o možném dopadu odsolování na životní prostředí, ať už z hlediska globálního v podobě možné produkce skleníkových plynů nebo dopadů lokálních. V závěrečné kapitole je podrobná ekonomická analýza odsolovacího zařízení pomoci počítačového programu DEEP. Popisované zařízení je na bázi multi effect distillation a reverzní osmózy, pro které se získává energie z jaderné elektrárny.
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Burners for high-temperature industrial applications
Naď, Martin ; Hájek, Zdeněk (referee) ; Bělohradský, Petr (advisor)
The main purpose of the bachelor thesis is the discussion of different types of burners and their components. Emphasis is placed mainly on the combustion process with oxygen content more than 21 % in the combustion air, the so called oxygen-enhanced combustion (OEC). The thesis describes characteristic features, possibilities and appropriateness of its use. Since in handling of oxygen there is a level of risk of injury, the thesis also assesses the safety and risks associated therewith. As the combustion process in terms of OEC is significantly different from the conditions of combustion with the atmospheric air, the thesis analyses the impact of the content of oxygen in atmospheric air on flue gas temperature and fuel consumption.
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Testing facilities for burner testing
Sobočík, Robert ; Hájek, Zdeněk (referee) ; Bělohradský, Petr (advisor)
This Bachelor’s thesis is focused on testing facilities intended for burner testing. It deals with a thorough research of accessible material including specialist technical literature and relevant websites in order to gather any available information on current burners and monitor present situation in the market, as well as to provide new information on burner testing facilities and collecting, processing and evaluating the data gained in testing process in Czech and foreign companies.
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Methods for suppressing NOx formation
Pořízek, Vít ; Hájek, Zdeněk (referee) ; Bělohradský, Petr (advisor)
The subject of this bachelor thesis are emissions of nitrogen oxides. The work deals with the suppressing their formation and with the possibilities of their elimination directly from the flue gas. The first part of the work analyses NOx emission limits for all stationary sources of pollution as well as the current effective legislation regarding emission limits of both European Union and the Czech Republic. Further part focused on nitrogen oxides themselves, their characteristics, impact on environment and last but not least on their formation mechanisms. Finally NOx reduction techniques are analysed and described, both primary and secondary.
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Burner testing
Rychter, Aleš ; Hájek, Zdeněk (referee) ; Bělohradský, Petr (advisor)
Bachelor thesis deals with testing of burners used in industrial applications. Overall is work divided into two main parts in which the first one is focused on basic classification of burners according to mixing type, fuel type and air supply system. The Second part of work is then focused on the burner tests. It describes types of tests and test environments in which the combustion tests can be carried out. In terms of tests, it is then necessary to make some important decisions, including the choices of testing fuel, combustion chamber and oxidizer, which have impact on the result. The preparation of tests also includes the developing of test procedure in which it is necessary to include the requirements of specific tests. The tests have to be carried out according to the relevant technical standards. After the realization of every test the evaluation of measured data has to be done and the test report summarizing the results of the test has to be issued. Since during the tests a number of process variables is measured like emissions, temperatures, pressures, flow rates, etc., the necessary instrumentation is described as well.
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Effective use of 3D Cad systems in the field of process engineering-III
Hájek, Zdeněk ; Dvořák, Radek (referee) ; Pavlas, Martin (advisor)
The thesis is concentrated on point of effective use of 3D CAD system SolidWorks in process engineering. This system is able to use for pipe systems besides its commonly expanded support in standard mechanical engineering. The aim is to create the library of standard parts and to create data for teaching SolidWorks in process engineering. Data are created in text form and in video form as instructing videos. The first part of the thesis contains the description of SolidWorks system, all its functions and modules. The second part contains the description of right procedures of individual parts, assemblies and drawing documentations creation. We aimed on conversion of circle-square air-conditioning pipe and flanges. The evaluation of all points of issue is mentioned in the conclusion.
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