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Methane emissions from temperate freshwater reservoirs
Bašta, Jan ; Frouzová, Jaroslava (advisor) ; Rulík, Martin (referee)
Methane (CH4) emissions from temperate freshwater reservoirs have only been evaluated for the last several decades. Freshwater ecosystems (including water reservoirs) release crucial quantities of this important greenhouse gas. Ebullition that releases methane into the atmosphere from bubbles originating from sediment is important source of methane. Regardless of the importance of these emissions, a very limited number of scientific research papers monitoring this flux into the atmosphere are available. Estimated values of methane emissions from freshwater temperate reservoirs vary considerably. There are many different methods for monitoring methane emissions. It seems that the freshwater reservoir stimulates methane formation in increasing scales. The size of the sum of methane emitted from freshwater reservoirs is also difficult to say.
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Comparative Analysis of Renewable Energy Sources in the Selected European Countries
Konečný, David ; Borecká, Marcela (referee) ; Ellederová, Eva (advisor)
Cílem této bakalářské práce je poskytnout informace o obnovitelných zdrojích energie v Německu a v České republice, a to zejména z pohledu historického vývoje, energetické politiky, využití a možností dalšího rozvoje těchto technologií. Po shrnutí klíčových událostí a smluv s přímým vlivem na obnovitelné zdroje, práce analyzuje danou problematiku v Německu včetně energetické transformace této země, nazvané Energiewende. Stejná metodologie je použita při analýze obnovitelných zdrojů energie v České republice včetně srovnání finanční podpory obnovitelných zdrojů v obou zemích. Práce je zakončena kapitolou o vlivu, dopadech a možných důsledcích německé energetické přeměny na energetický sektor České republiky.
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Water energy potential in breeding tanks
Schittenhelm, Dominik ; Radil, Lukáš (referee) ; Morávek, Jan (advisor)
The thesis is divided in several parts. The first part is theoretical and its main focus is the description of hydroenergy and the theory regarding water turbines and their potential use in small hydro powerplants.The second part describes micro hydroelectric power plant design in fishery Bělidlo. It begins with calculation of the waterflow rate based on the performed measurements. The thesis further describes the actual design of Banki turbine with generator and gear unit selection. The last part of the work deals with estimating construction costs and production of electricity and also of awaiting investment return time.
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Small hydroelectric power plant design
Števček, Tomáš ; Radil, Lukáš (referee) ; Mastný, Petr (advisor)
The thesis is structured in two parts. The first, theoretical one, describes hydroenergy, components used in hydroelectric power plants and water turbine fundamentals. The second part, concerning small hydroelectric power plant design, aims at studying possible utilization of the Biely Váh watercourse, for the purpose of a power plant construction. In selected location, earth-filled dam with intake tower was designed, with a generator room situated under the dam. In mechanics part, there were devised two cross-flow turbines attached to generators through two-speed gearboxes. In electrical part of the design, asynchronous generator was selected, electrical protection of power plant was specified and main electrical scheme was designed. Lastly, construction costs were estimated and by economic evaluation of design was found, that small hydroelectric power plant construction in this location can be viable in the case of state grants provided.
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Support of the energy sources construction for households
Stručovský, Aleš ; Radil, Lukáš (referee) ; Bartošík, Tomáš (advisor)
This bachelor thesis deals with the comparison of energy sources used for residential construction. It focuses on photovoltaic power plants, wind power plants, hydropower plants and cogeneration units. Budget cost of energy source is limited to the amount of 550 000 CZK. Every source of energy is defined by its feature, operating principle, advantages and disadvantages. Options of selling the produced energy and its price are specified. Furthermore, the particular building licence applications (construction administration approval, generation of power questionnaire, application for connection to the distribution network, application for the contract of energy production support) including all the necessary enclosures have been analysed. Essential aspect for buying the energy source is its power and it is chosen according to the type of source. Energy source of hydropower systems is flow and gradient, in wind power systems it is wind speed, in photovoltaic power systems it is sufficient intensity of sunshine and in cogeneration units its dependance on annual heat consumption. Specific energy source available on our market is chosen for every group and the calculations of annual electricity production, period of repayment and profitability in 20-year running period are performed.
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Utilization renewable energy sources inside of EPS Czech Republik
Zmeškal, Pavel ; Procházka, Zdeněk (referee) ; Matoušek, Antonín (advisor)
The purpose of this work was the analysis of current state and further development of renewable energy in the Czech Republic. And next their effects on the electricity system of the Czech Republic. On the basis of established facts has been developed actual state of renewable energy sources. The current situation is only orientation and is still changing at this time. Another objective was to evaluate the various renewable energy sources in terms of their impact on the electricity system and recoverability in the Czech Republic. In more detail were read up the conditions for the wind power plants operation and their connection to the electricity system of Czech Republic. In fine were discuss the impact of renewable energy sources on electricity system and prerequisite for their further development in the Czech Republic.
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Assessment of the impact of different types of RES in the power system
Zmeškal, Pavel ; Matoušek, Antonín (referee) ; Mastný, Petr (advisor)
This thesis deals with usage of each kind of RES under conditions of Czech republic and their usage at areas placed in. Consequently supplied RES output power at time and its influence on reliability of supply in EPS CZ. Way of operation of RES from point of view of requirement on regulation and control of operation of EPS is more studied on operation of different kinds of wind power plants, which due to its variable output power affects not only EPS CZ. At final caption, economic influence of RES to EPS is reviewed as a unit, increasingly claims on regulation, increasingly benefit on support of RES. All these influences increase price of electricity for end user.
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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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Renewable energy sources for one-family house
Burýšek, Jan ; Špiláček, Michal (referee) ; Fortelný, Zdeněk (advisor)
This Bachelor´s Thesis deals with the topic of Renewable Energy Resources. It is divided into two main parts. The first part is a research on renewable resources of energy which are available in the Czech Republic. The second part is focused on use of particular resources in a chosen object (house) and their subsequent efficiency evaluation.
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Investment into renewable energy in Sub-Saharan Africa
Bursová, Katarína ; Pavlík, Petr (advisor) ; Kašpar, Václav (referee)
The main goal of master thesis is to proof that investment into renewable energy may have a positive impact on standard of living for local community and the region of Sub-Saharan Africa. The thesis is divided into three main chapters, while the first one is dedicated to detailed analysis of renewable energies, demographic and geographical indicators, the second one is focused on investment and financing of energy projects. The last chapter leads readers through case study of small hydropower plant into findings that are essential in proving the main idea of whole thesis.
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