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Hydrogen and automobiles
Břoušek, Lukáš ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
The purpose of this thesis is to demonstrate the possibilities of hydrogen-based gear in personal cars. The thesis also describes the hydrogen from the perspective of the characteristics, the form of production, conserving, distributing and its utilization. Furthermore, in more details are described and compared currently well-known hydrogen-based devices, for this purpose the complex analysis Well to Wheel will be used. Final part of this publication will be devoted to evaluation of this analysis and also the thesis will outline what are the probable trends of the hydrogen-based technologies.
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Unit Injectors
Cihlář, Lukáš ; Drápal, Lubomír (referee) ; Dundálek, Radim (advisor)
This bachelor’s thesis deals with the description of unit-injector system. Injection system used in passenger cars as well as Unit-Pump-System used in trucks is described. One chapter deals with general problems of emissions, including description systems of the reduction exhaust gases. In the end is the practical application of the system in the engines of the Volkswagen Group.
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Hydrogen fuels
Umlauf, Martin ; Bébar, Ladislav (referee) ; Jícha, Jaroslav (advisor)
Paper presents a basic review and comparison of energy-conservation made of renewable sources. Principal question of paper concerns evaluation of hydrogen-use made of electrolysis of water. First part of the thesis focuses on the production of energy from renewable sources and the possibility of energy-accumulation. The next section describes methods of hydrogen production and utilization of hydrogen as a fuel for combustion engines. Attention is paid to various aspects dealing with construction of combustion engines using hydrogen. Final part of the study presents comparison between combustion engines using known sorts of fuels as to their pollution and emission-level. Next comparison deals with economic cost per kilometer, when different sort of fuels are taken into account. Conclusion concerns approximate calculation of the production of hydrogen from water by electrolysis using photovoltaic power plants.
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Small boilers as a source for family houses
Studnicki, Jakub ; Katolický, Jaroslav (referee) ; Štětina, Josef (advisor)
The paper summarizes the basic parameters of boilers with low power for use in family homes. The boilers are divided into chapters according to the used fuel (gas, solid fuels, liquid fuels, biomass, pellets...). For each boiler there are basic characteristics, dimensions, methods of attachment to the wall or floor and if hot water heating is integrated. It is also characterized by a boiler heating system, i.e. the flue requirements, size and location of the water supply for heating. In another part there is an assessment of economic and environmental aspects of boilers. From an economic perspective I focus on a fuel economy and from an ecological mainly on the ratio of fuel efficiency and pollutants emitted into the air.
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Modern low-emission combustion chamber for jet engines
Mašek, Jakub ; Nastálek, Ondřej (referee) ; Šplíchal, Miroslav (advisor)
Bachelor´s thesis examines modern low-emission combustion chambers for jet engines. It´s foremost aim is to specify construction parameters of low-emission combustion chambers, compare it´s features and comprise the use of these combustors in civil aviation. Thesis deals with reasons of modern low-emission combustion chamber development and estimate future development in the region of aircraft industry. Another aim is to specify legislations of aviation emissions, history of certification standards and organizations, which make and control these limits.
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Particle size of solid ash
Lochman, Petr ; Špiláček, Michal (referee) ; Hrnčířová, Michaela (advisor)
This bachelor thesis deals with possible ways of analyzing the size of solid particles of ash and their effect on the environment. The first half is devoted to combustion, ash formation and fuels, which are commonly used for energy production. The second half is devoted to a practical analysis of solid particles of different ash samples and their subsequent evaluation.
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Purification of flue-gas desulfurization
Křesťan, Jan ; Špiláček, Michal (referee) ; Hrnčířová, Michaela (advisor)
The aim of this thesis is theoretical elaboration of flue-gas desulfurization and emission limits of sulphur dioxide. Thesis is divided into three parts. First part is about content of sulphur in fuel, formation of sulphur oxides and their influence on human health and environment. Second part is dedicated to sources of sulphur dioxide, present emission situation in the Czech Republic and emission limits of sulphur dioxide. The third part describes methods how to reduce emissions of sulphur dioxide, especially methods of flue-gas desulfurization. The thesis is based on technical texts, Czech laws about air pollution and data from the Czech hydrometeorological institute.
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