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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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Potencial for geothermal energy utilizing
Kohut, Vojtěch ; Bogdálek, Jan (referee) ; Pospíšil, Jiří (advisor)
The main purpose of this bachelor’s thesis is to collect all available literature, from which can reader obtain basic knowledge of geothermal energy practical usage possibilities. Geothermal energy comes from heart of our planet. As such it is ranked among renewable energy sources. Thesis describes direct heat utilisation for heat supply systems and electric power generation in geothermal power plants. It is also entertain about possible usage of low-potencial geothermal energy by the help of heat pumps.
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Legislative and economic aspects of exploitation of renewable energy sources
Vondra, Marek ; Katolický, Jaroslav (referee) ; Jaroš, Michal (advisor)
The aim of this thesis is a brief outline of legislative and economic issues associated with energy production from renewable sources. After reading the work, potential investors should be connive with the pros and cons of the use of renewable resources. The thesis has a recherche character and tries to provide basic information for the possible preparation of an investment project. Renewable energy sources have become an integral part of the energy market, despite their lack of profitability in comparison with conventional sources. It is a consequence of European Union’s financial support. However, the support is changing over time, as well as avalaible technologies, local conditions and many other factors affecting the current investment attractiveness of renewable energy sources. All these factors must be considered by an investor. The current situation is positive for use of biomass energy, both at home and in large incineration plants and cogeneration units. Electricity can be advantageously produced in photovoltaic and small hydropower plants. There is a growing importance of heat pumps exploitation. We can expect slower development of photovoltaic farms and wind power plants contructions.
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Renewable resources of energy in Czech republic
Truhlář, Marek ; Fortelný, Zdeněk (referee) ; Chroboczek, Libor (advisor)
The content of this bachelor study is a technical recherche of the renewable resources of energy in the Czech republic. In the first part of the study there are described individual kinds of renewable resources of energy. The principle, the usage potential in Czech republic, some advantages and disadvantages about every topic are mentioned. In the second part the study is focused on usage of solar energy in the Czech Republic. The present state of used barrierlayer photocells and solar collectors is decribed in this part. In the last section there is a description of a photovoltaic power station in Otrokovice.
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Alternative energy sources
Stránský, Jaroslav ; Moskalík, Jiří (referee) ; Škvařil, Jan (advisor)
In this work, I tried to summarize the current state of world energy resources that we use to convert into electrical energy. There is solved the question of compensation running short supplies of fossil fuels and reduce discharge of greenhouse gasses. I´m looking for suitable compensation in department of alternative energy sources, among which I included the power of the Sun, water, wind, geothermal energy, using heat pumps, combustion energy, nuclear energy, fuel cells and hydrogen use. About anyone of replacing sources you learn about its history, advantages and disadvantages, the principle of function energy transform devices, and compare the potential that is available in the CR and in the world.
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Actual State and Potential of Renewable Sources Utilization in the EU
Kubín, David ; Radil, Lukáš (referee) ; Macháček, Jan (advisor)
This bachelor’s thesis named Actual State and potential of renewable sources utilization in the EU offers a detailed summary of the current and future utilization of renewable resources in each member state of the European Union. The opening chapters briefly introduce the term renewable resources and the legislation relating to this issue. The following chapter is devoted to a detailed background research of actual renewable energy utilization in all twenty seven member states of the European Union. The countries are ranked by their dates of accession to the Union in ascending order, in each chapter alphabetically. All information and data are obtained from reliable sources such as annual energy reports of ministries or institutions which are concerned with energy issues. This chapter contains a great amount of charts and tables taken from annual reports and which are revised for the needs of this thesis. The chapter named Potential of renewable energy utilization in the EU offers an insight into the assumed future utilization of renewable resources up to the year 2020. This chapter draws from so-called National renewable energy action plans (NREAP) in which each member state presents its plan leading to higher renewable sources utilization in the near future. The reader is therefore able to familiarize with plans concerning renewable sources in each member state. The chapter named Complex evaluation familiarizes with some pros and cons concerning renewable sources and their utilization. Further the author presents his point of view on renewable sources and some recommendation leading to a better integration of renewable sources into energetics.
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System Proposal for the Use of Low-potential Heat
Kučera, Roman ; Bartoň, Jan (referee) ; Mastný, Petr (advisor)
This bachelor thesis deals with the problematics of a low-potential heat from the energetics point of view. It also deals with the sources and subsequent use of the low-potential heat. First of all, the thesis mentions the origin of these sources and also describes where they can be found. Also the technologies, that are able to utilize this heat, like heat pumps and solar collectors, are mentioned in this part of the thesis. In its next part, the bachelor thesis deals with use of the waste heat for heating and production of electrical energy. In the last part, the thesis presents the project that introduces a specific concept of the system for object heating from the waste heat.
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Specification of the geothermic model in the environs of several selected boreholes
Čápová, Lucie ; Dědeček, Petr (advisor) ; Procházka, Martin (referee)
With the advances in research of the Hot Dry Rock environment and Enhanced Geothermal Systems, geothermal energy is soon going to compete with other unconventional energy resources in Europe where Germany and France are pushing the research ahead. In the Czech Republic, the geothermal exploration borehole drilled in Litoměřice in 2006 - 2007 provided information that contributed greatly to the understanding of geothermic conditions in the country. In addition to Litoměřice, two other areas have been recently subject to geothermal exploration: Semily and Liberec. These three areas have been studied in detail in this Master's thesis to assess their geothermal potential. Information on the geology of the selected areas was gathered from numerous scientific papers and reports and was compared with information from geological maps and boreholes. On the basis of this information, geological sections of the area of Litoměřice and Semily were compiled. Drill core samples from five boreholes from the geological units in the areas under investigation were collected and measured using the Lippmann & Rauen Thermal Conductivity Scanner. Thermal conductivity of geological units inferred in the basement but not intersected in the boreholes was estimated on the basis of values presented in literature. Finally,...
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Possibilities of hydraulic fracturing in geothermal energy exploitation
Pokorný, Jakub ; Fischer, Tomáš (advisor) ; Horálek, Josef (referee)
Hydraulic stimulation is a technique used to increase the permeability of reservoir formation by creation of new and connection of existing cracks. The aim of this bachelor thesis is to collect and explain the basic principles of continuum mechanics and fundamentals of fluid hydraulics that are an integral part of the overall understanding of the issue of stimulation and its later more detailed study. After a general introduction, these findings are put into context in terms of mechanism of rock fracturing and fluid flow in the emerging stimulated geothermal systems. This thesis is completed by placing the example of geothermal project Groß Schönebeck from the start of stimulation to the final hydraulic tests, which were carried out with the aim of assessing the efficiency of fracture permeability enhancement. Powered by TCPDF (www.tcpdf.org)
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