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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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Power Supply System for Housis Using Renewable Resources
Gálus, Matej ; Punčochář, Josef (referee) ; Šebesta, Jiří (advisor)
The aim of this thesis is to describe the advantages of simultaneous utilization of photovoltaic and wind electricity in an autonomous system, supplying the household with electricity without connection to the electrical grid. The most used methods of connecting photovoltaic modules and wind generators to chemical batteries are discussed. Several maximum power point tracking methods and their properties are described. A block schematic diagram of an autonomous off-grid system utilizing chemical accumulators is proposed. The system also contains an inverter producing standard mains voltage 230 VAC to supply common household appliances. A Quasi-Square Wave converter topology was chosen for all three power converters. An experimental 180 W output power QSW converter with one controllable switch was designed, simulated with Pspice, manufactured and tested to verify the efficiency of the topology. Excellent agreement was found between predicted and measured efficiency at full output power. Efficiency for reliable operation varies between 89% and 92,2% at full power and depends mainly power inductor and MOSFET used. After successful evaluation of QSW topology, the power converters for the main system were designed. Because of higher power, the converters were designed as four-phase, whereas each phase contains two controllable switches to boost efficiency mainly in low-power area. The most critical and difficult part of the project was to design the mixed-signal control sections for the converters to ensure proper switching of two controllable MOSFETs in each phase. For user interactivity, main control board with graphic LC display, Ethernet module and SD memory card slot was also manufactured.
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Design of wind power plant
Starý, Ondřej ; Dlugoš, Jozef (referee) ; Řehák, Kamil (advisor)
Renewable energy sources are currently a much-discussed issue. One of the possibilities of their use is the production of electricity using wind power plants. This work therefore describes in detail construction of wind turbines. At the same time, there is a brief evaluation of wind power plants, from an energy and economic point of view. Part of the work is also the calculation of the optimization of the gearbox weight and a description of the design of the wind turbine coupling.
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Creation of laboratory exercises for Renewable sources of energy
Bajgl, Tomáš ; Jandová, Kristýna (referee) ; Křivík, Petr (advisor)
This diploma thesis deals with the transformation of solar and wind energy into electrical energy by using a photovoltaic panel and a wind turbine. The work gives insight into the Czech Republic’s issue of energetics in the context of historical development, the current state, and the expected future development. The primary attention is given to the renewable sources - the solar energy and wind energy. Basic principles of creation and manipulation of solar and wind energy are described in this work. Two laboratory tasks are created for the Renewable Energy Sources' class as a part of the practical part.
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Using renewable energy sources
Vaňko, Adam ; Bátora, Branislav (referee) ; Matoušek, Antonín (advisor)
Thesis deals with the issue of renewable energy sources. It contains the description of their usage at present as well as the possibilities of their installation. When dealing with the individual types of sources the thesis states their advantages, disadvantages and the facts concerning their further development. Technical development brings us new and perspective types of renewable energy sources, the description of some of them can be found in the thesis as well. The second part of the thesis is focused on the solution of electric power supply for a holiday cottage. Authonomy photovoltaic system is suitable for its application. The system is designed to have an ability to supply electrical units in the cottage during the whole year. To be able to consider profitability of the photovoltaic system installation the thesis contains the project of low voltage energy branch connection. This branch line of 1200 m in length is properly designed and the thesis states its capital costs as well. Financial comparison of the photovoltaic system costs on the one hand and the costs of low voltage branch line on the other hand in the next 30 years of usage proves the profitability of the photovoltaic system.
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Utilizing of wind energy with accumulation
Mészáros, Gabriel ; Chroboczek, Libor (referee) ; Pospíšil, Jiří (advisor)
The introduction of this paper deals with wind-powerplants, their components and distribution according to their construction and output. Technologies of accumulation of energy are described, because the conditions for energy production from wind are not constant (windlessness, storms, etc.). The technologies are compared in terms of economics and technology. A basic design for a system with accumulation is made at the end of the thesis.
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Alternative energy sources for family house
Stacha, Radek ; Fortelný, Zdeněk (referee) ; Škvařil, Jan (advisor)
Bachelor thesis is focused on alternative sources of energy for the house and their evaluation. The first part focuses on the general view on alternative energy sources and making explicit the house of each resource of which the assessment is undertaken. The next chapters are focused on each types of renewables for which will be the conclusion in the end of each section for the assessment of a given house. The conclusion is evaulated for the selected type of alternative energy resources towards normally used ones.
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Form follows wind energy
Brahmi, Jakub ; MCIBSE, CEng (referee) ; Kaftan, Martin (advisor)
Diplomová práce zkoumá možnost využití větrného proudění jako hnacího elementu architektonického návrhu za účelem integrace větru jako jeden ze zdrojů získávání energie. Větrné turbíny byly již využity v několika architektonických projektech, spíše však jako doplněk k výškovým budovám, jejichž výška je zřejmým předpokladem pro snažší získávání větrné energie díky dosahu k rychlejším proudům vzduchu. Tento projekt prověřuje skrze architektonický návrh možnost získávání energie z větru i v menších výškách, kde není energetický potenciál tak zřejmý, kvůli výrazně menším rychlostem větru. Výchozím bodem pro rozšíření využití větrné energie je Venturiho efekt, jehož výskyt je možné pozorovat v urbánním prostředí především jako negativní jev působící nepohodlí obyvatelům města, kvůli zvýšeným rychlostem větru. Naproti tomu, když je venturiho efekt předpokládán, může být využit pro zrychlení proudění vzduchu a následného sběru energie. Za účelem podpoření Venturiho efektu pro sběr energie zkoumá projekt, jaký má tvarové uspořádání vliv na proudění vzduchu. Za pomoci simulací proudění tekutin(CFD) a na základě hodinových dat povětrnostních podmínek vybrané lokality, odvozuje možné množství získané energie, různými tvarovými uspořádáními. Energetické zisky jsou srovnávány s předpokládanou energetickou náročností stavby a následně je skrze architektonickou studii prověřována využitelnost stavby jako vítr urychlujícího tvaru stejně tak, jako objektu umožňujícího běžné obývání.
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