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Barrier properties of varnishes for protection of photographs
Lokotschová, Radka ; Čeppan, Michal (referee) ; Veselý, Michal (advisor)
In this diploma thesis the basic principles of inkjet print, ink composition, print media and degradation mechanisms of ink dyes are summarized. The thesis deals with study of varnish barrier properties in coloured inkjet prints. Permeability of water vapour and oxygen (parts of atmosphere) depending on different coatings are tested there. In addition the influence of ozone on degradation of dyes was studied, while ozone was permeating through barrier varnish layer of inkjet print. Ozone plays an important role in degradation processes of the inkjet prints and it also causes a gas-fading. Concentrations of acting ozone were established by iodometric titration. Simultaneously kinetics of degradation of Orange 7 was studied on indicator papers.
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OPTIMIZATION OF WELLNESS AIR CONDITION
Kysilka, Michal ; Zubíček, Vojtěch (referee) ; Šikula, Ondřej (advisor)
The theme of diploma thesis is a design optimization of air distribution in swimming-pool hall with regard to free water surface evaporation. This problem was solved according to determined criterions with the aid of CFD simulation. Experimental measurement part of the thesis deals with evaporation problems where own formula for this physical phenomenon is determined. This formula is compared with already known algorithms. Author suggests that such formula might be integrated in CFD software.
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Measurement of greenhouse gas concentrations
Dohnal, Jan ; Novák, Vítězslav (referee) ; Bača, Petr (advisor)
This semester thesis deals with the greenhouse effect, various gases and methods of measurement. On the greenhouse effect is viewed from its historical dating, despite changes in atmospheric composition and reactions of individual institutions. It contains a theoretical analysis of the individual gases. It focuses on the most harmful greenhouse gases such as water vapor, carbon dioxide, nitrous oxide, methane, ozone, chlorofluorocarbons and halons. Analysis methods for detection of gaseous substances. Part of this work is focus on the detection of nitrogen dioxide and chloro-fluorocarbon. The data is processed using a microcontroller and then sent to an Internet server thingspeak.com. If the device proves successful, will be used as a laboratory exercise in the course Ecology in electronics.
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Measurement of greenhouse gas concentrations
Dohnal, Jan ; Vyroubal, Petr (referee) ; Bača, Petr (advisor)
This master thesis deals with the greenhouse effect, various gases and methods of measurement. On the greenhouse effect is viewed from its historical dating, despite changes in atmospheric composition. It contains a theoretical analysis of the individual gases. It focuses on the most harmful greenhouse gases such as water vapor, carbon dioxide, nitrous oxide, methane, ozone, chlorofluorocarbons and halons. Analysis methods for detection of gaseous substances. Part of this work is focus on the detection of nitrogen dioxide, chloro-fluorocarbon and methane. The data is processed using a ATmega’s microcontroller and then sent to an Internet server thingspeak.com. If the device proves successful, will be used as a laboratory exercise in the course Ecology in electronics.
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Atmosferic gasification of biomass by the addition of oxygen and steam
Vypušťáková, Veronika ; Milčák, Pavel (referee) ; Baláš, Marek (advisor)
The topic of master´s thesis is atmosferic gasification of biomass by the addition of oxygen and steam. The theoretical part is devoted to the description of biomass, process of gasification, kinds of gasification reactor and product gas. Further experiments are devised depending on the gasification medium and output temperature. In this case, the key aspect is the steam addition control. In the practical part, these experiments are performed in a fluidized bed reactor. Resulting values from samples of gas and tar are subsequently processed and evaluated.
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gasification of biomass with a mixture of oxygen and water vapor
Chlubna, Martin ; Lisý, Martin (referee) ; Baláš, Marek (advisor)
The aim of this diploma thesis is to describe the gasification of biomass with a mixture of oxygen and water vapor. The theoretical part is focused on the gasification process, gasification reactors and the quality of the resulting gas. In the experimental part we look for the ideal ratio of oxygen to water vapor, which are used as gasification media. Subsequent measurements are carried out on the fluidized bed reactor, the results of which are further processed and evaluated.
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Optimizing the design modern low energy timber structures
Bečkovská, Tereza ; Tichomirov, Vladimír (referee) ; Myslín, Jiří (referee) ; Vávra,, Roman (referee) ; Šuhajda, Karel (advisor)
This Doctoral thesis is focused on optimizing the design of modern wooden structures. Because this theme is very comprehensive, the work analyzes the distribution of moisture through the building envelope in detail. In the introduction are summarizes the knowledge of the physical processes in the constructions, there are also the properties of wood as a material and basic information about system of timber structures. The next section describes used methodology and experimental measurements realized on an experimental timber house EXDR1. There is specified the principle of measurement based on the SWOT analysis, the use measuring devices or possible solutions in the field of numerical modeling too. Main results and conclusions of the dissertation for technical practice including possibilities of further research are summarized in the final section.
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Rankine cycle with water steam for power generation
Uhříček, Michal ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The Rankine cycle with water steam is the basic thermal cycle used in power generation for producing electricity. Through this cycle thermal energy (of any source) is transformed into shaft work, which then generates electricity. Therefore, the aim is to achieve the highest efficiency of this transformation with losing as little of the usable energy as possible. This bachelor thesis is focused on describing the general thermodynamics cycle, the basic Rankine cycle and Rankine cycles with modifications, which help to increase the thermal efficiency. The practical part of this thesis is dedicated to programming the script in the MATLAB programming environment for easy thermodynamic analysis of the basic ideal Rankine cycle.
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Preparation of laboratory exercise for school subject Ecology in Manufacturing
Balcárková, Lucie ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
The thesis deals with the design of laboratory task on selected topics and brings together theoretical knowledge needed to understand the principle and function of the proposed system. The theoretical design is elaborated from the point of view of physical principles, physical feasibility, electronic difficulty, user service, correctness of the system, and its economic aspect. Furthermore, the practical implementation of the chosen task is disscussed in detail, based on the collected theoretical knowledge, a comparison of the available options and the results of the measurements made.
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