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Well-being of students of the Faculty of Education and a prevention of burnout syndrom
Bílková, Nikola ; Frombergerová, Anna (advisor) ; Rudorfer, Lothar Filip (referee)
This bachelor thesis deals with the issue of well-being of university students from Faculties of Education across the Czech Republic. The aim of the theoretical part was to introduce and define the concept of well-being in terms of the most well-known theories and to describe what specifically defines well-being of university students. For orientation, the developmental period that corresponds to studying at university was briefly described. Next, the theory focuses on the stressors of college study and what coping strategies for coping with stress are effective or not for students. The research part was conducted qualitatively. Its purpose was to describe the experience of 7 students from Faculties of Education via semi-structured interviews. The data from the interviews were further analyzed and interpreted through reflective thematic analysis. The outcome of the research are the 4 most significant themes tied to students' well-being. The research shows that motivation and attitude towards education are central to students' perceived well-being. Also that relationships and support help students the most in their education journey. Last but not least, that the most strongest stressor for student are time demands. Lastly, the research also makes recommendations for universities, specifically to...
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Feasibility study pumped storage hydropower plant in a particular locality
Vaněk, Michal ; Štigler, Jaroslav (referee) ; Hudec, Martin (advisor)
Electric energy storage represents an area, which needs to be further developed in order to accommodate more installed capacity of wind and solar power plants in the electric grids. Pumped hydro energy storage still remains ahead of other storage technologies in terms of achievable storage capacity. However, environment protection which is one of the obstacles for further PHES development in Europe causes significant reduction of suitable sites. It is therefore useful to examine also those sites, which seem to be less favourable for PHES at the first glance. This thesis deals with a feasibility study of a PHES on place of a former graphite surface mine. The thesis includes computation of basic capacities, choice of a suitable machine arrangement and introduction into PHES feasibility issues in electric grids. Two possible solutions of a smaller PHES that differ in their capacities were suggested based on available materials about the site as well as on available materials from Francis pump turbine model research. In case of both solutions a binary machine set is used and the available capacities are in small tens of megawatts. However, there is a wide head variation at the site, which causes significant power variation. Concerning the feasibility of the PHES, it is very uncertain that the participation in the day-ahead electricity market, would provide enough revenue to cover operation and capital costs. A following economic analysis investigating the capital costs of this particular PHES would be beneficial, as well as more detailed design of the reservoirs.
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Facility management as support of user of buildings
Krůta, Vítězslav ; Bárta, Matěj (referee) ; Tichá, Alena (advisor)
This diploma thesis examines facility management – support services for building users. The theoretical part describes the importance and objectives of facility management, included processes and its development in the world and the Czech Republic. Attention is also given to the currently implemented, the long-awaited standardization in this field. The practical part is the case study that analyses the implementation of facility management on specific building – administrative and commercial centre in Prague. The thesis concludes with design of optimization and extension of support services with respect to the benefits for the building owner and the service supplier.
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Combi-Cycle with piston engine
Kubik, Martin ; Caha, Tomáš (referee) ; Fiedler, Jan (advisor)
The scope of this diploma thesis of focused on processing and calculation of the technological scheme for combi-cycle power plant with piston engine using heavy fuel oil. There are analyzed demands of piston engine for HFO and design of technological process preparation. This thesis analyzes the suitable locations, service options and alternative solution - heating plant with piston engines. Benefits of each option are assessed in the economic model, assuming power as a source of base load and providing support services. The results are intended to assess feasibility of the investment project.
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Electric vehicles as energy storage element for electrical grid
Novák, Martin ; Minařík,, Daniel (referee) ; Baxant, Petr (advisor)
This master´s thesis deals with possibilities of accumulation electric energy with the electric vehicles and their use for electric grid regulation services. In the introduction of this thesis is characterized the current world-wide state of electromobility, including the Czech Republic. Furthermore are summarized main advantages and disadvantages of the expanded involvement of the electric vehicles in the traffic. In the second part if this Master´s thesis the vehicles are divided into three main groups. The third part of the thesis describes the energy storage and generation units used in vehicles. In this part of the script are each of the energy storage parameters compared. The other chapter includes the list of current battery electric vehicles with all their important technical parameters. The fifth chapter summarizes the possibilities of the use of electric vehicles in the Vehicle-to-grid system. This chapter also discusses in detail the ancillary services of the electric grid in the Czech Republic. In the last part of this Master´s thesis there is calculated an economical potential of electric vehicles providing the primary and secondary regulation.
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Potential of non-frequency ancillary services for a distribution system operator
Reiskup, Filip ; Holub, Martin (referee) ; Ptáček, Michal (advisor)
This thesis provides a basic overview of the ancillary services in a transmission system. It summarizes changes regarding the implementation of European directives SOGL and EBGL. It describes in detail a portfolio of non-frequency ancillary services used in the distribution systems. It evaluates the demand of E.ON distribution system potential for those services in particular locations. Practical part is focused on a potential of reactive power management in this distribution area. It evaluates reactive power flow into transmission system and indicates the most critical substations. This thesis also covers analysis of existing resources in this distribution area and assign their possible potential in reactive power management.
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Role of Czech NPP within grid power regulation
Kostečka, Jan ; Martinec, Jiří (referee) ; Katovský, Karel (advisor)
The aim of the Bachelor’s thesis is the involvement of Czech nuclear power plants in the Czech energy networks, but also in the European Network and their adaptation. Effect of expansion of renewable electrical energy produces the asymmetry in the network and places formed with an excess of electrical energy and places with lack of electrical energy. Flows of electric energy can affect the security and safety of distribution lines. Excessive overloading can cause them to collapse. Therefore, this work is focused on solutions and avoids this problem and minimizes this potential damage. However, the impact of energy revolution has a giant proportion about these overflows network energy. Uncontrollable wind and solar power source may create regionally region surge and flow of this energy goes to areas with shortages of electrical power. The regulation has an impact on fuel. This renegade production could extend fuel cycle, or expand the campaign to more years at least a year. The calculations can show the amount of fuel that can still be used, and thereby increase the yield and economic benefit conditions for extending the life of the reactor units.
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Electric boiler connection in heat plant for providing ancillary services
Ditrych, Marek ; Příhoda, Martin (referee) ; Wasserbauer, Vojtěch (advisor)
The bachelor thesis deals with using the electric boiler for extension ancillary services in heating plant. The system and support services are described in the thesis, because the ancillary services regulate an energy deflection. The system and ancillary services are described in the thesis. Thanks to these services an energy deflection is regulated. The thesis describes different types of electric boilers and there functions. In the thesis is shown the possible solution of using an electric boiler in heating plant Opatovice. The cable conduction is designed for a power of electric boiler. For this reason, there is calculated the equivalent warming short-circuit current close to the electric boiler.
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Nuclear Power Plant Dukovany Tasks within an Electricity Grid of the Czech Republic
Prokop, Ondřej ; Řež,, Martina Malá, Centrum výzkumu (referee) ; Katovský, Karel (advisor)
The aim of the Bachelor’s thesis is to describe the role of The Nuclear Power Plant Dukovany (Dukovany NPP) in the Czech electricity grid. Increasing of the production of electricity from renewable energy sources in the electricity grid causes more frequently compliance of N-1 criterion and it decrease the reliability of the electricity grid. The risk of Blackout increases, which would cause large economic losses and danger to the life of human beings. Therefore, reliable, good controllable and safety sources of electricity are very important. The first part of the thesis describes the role of Dukovany NPP in the process of regulation of basic electrical parameters during the normal operation of electricity grid. The second part of the thesis deals with states and the function of Dukovany NPP after full or partial disintegration of the electricity grid. Final part analyzes the importance of Dukovany NPP in Czech electricity grid and future development Dukovany NPP with possibility of the construction of new nuclear units after the end of the operation in 2035. The Dukovany NPP is an important regulator of the reactive power. There isn’t other power plant in the southeastern part of the Czech Republic, which could significantly control reactive power. The power from Dukovany NPP, which is provided on ancillary services controlling the real power and frequency has been increasing in recent years. This is due to the increasing production of renewable sources. Units switch to island operation after partial disintegration of electricity grid. If frequency exceeds the limit, the units will switch to it is own consumption. In this stage of operation at own consumption can Dukovany NPP operated without the time limit. Dukovany NPP may participate in restoring the electricity grid, based on dispatch control instruct. If switching to own consumption is not successful and back up sources and emergency’s dieselgenerator are unavailable, the power supply has to be restored as soon as possible. There are six independent solutions to restore the power supply. Next option of restore power supply will be the AAC network after the completion of construction in 2014. The AAC network will be resistant to the extreme weather and will be place it in the area of the power station, thereby Dukovany NPP will be more independent on external network.
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