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Uninterruptible Power Supply
Mrázek, Petr ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
The thesis deals with Uninterruptible Power Supply (UPS) and associated problems of backup power in case of unexpected outages of electricity. Start of work is dedicated to limitation of the electricity supplies, as well as their causes and consequences. Furthermore, brief history of UPS and subsequently distinguish between UPS’s architectures. There is also a description of the energy sources such as batteries, flywheels or fuel cells. Part of thesis describes security of electricity supply in health care facilities, including requirements for emergency power. The own design of UPS is described in the end.
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Wind power generation and energy accumulation possibilities
Krbal, Michal ; Mastný, Petr (referee) ; Drápela, Jiří (advisor)
The goal of this bachelor’s thesis is to inform about conditions of running and the character of running of the wind power plants and about the suitable storage systems for the possibilities of time invariableness of power supply. For these reasons is immediately in the first chapter of the thesis described state of using wind power plants in The Czech republic and other countries in Europe which produce electric power. Description of individual functional parts is important mainly from the point of electrician conversion of kinetic energy of wind to electric energy with help of the electric power generator with the highest efficiency and without need for maintenance. It is necessary to know those functional parts of the power wind to be able to design appropriate storage system. The output electric power is very variable at time, mainly output voltage, because wind energy is variable too. The characteristics of the wind power plants as output voltage, frequency and their switching graded at time have to in accordance with requirements of the electricity supply systems not to disturb the stability or even collapse of the electricity supply system which would lead to serious economic consequences. These predicaments can be prevented with precise meteorological forecast or by using the acceptable storage system with small acquisition and operating costs, requirements to safeness and long service life, low weight and high efficiency of conversion of energy. The storage systems are classified into centralized and decentralizing systems with requirements to dynamic running and running time. To fulfil these conditions it is essential to choose acceptable and accessible locations with year lasting qualities of wind, which are being checked in advance using measurement and mathematical calculations.
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Accumulation of Energy from Renewable Energy Sources
Heller, Ondřej ; Radil, Lukáš (referee) ; Mastný, Petr (advisor)
The objective of the first part of master’s thesis is mapping the potential of various types of renewable sources in Europe and Czech Republic, especially solar energy, wind energy, water energy and biomass. There are described principals and ways of energy generation from these sources, brief overview of current technologies, and also their advantages and limitations. An important part is electric supply continuity from renewable sources, there are large differences and the resulting to restrictions on construction and connecting the units to the power system. In this work there are mentioned some impacts on network and rates of change of supply, some sources are also evaluated in terms of maximum power, that can be connected to the power system in our country. The conclusion of the first part is dedicated to energy storage technologies, which are suitable and usable for renewable sources, there are described their principals, properties, status of development and types of aplications, in which these technologies are used. This chapter also focusses on the price level of each technology. The second part of the thesis deals with 1 MWp on-grid photovoltaic power plant design. This design includes also the redox flow batteries accumulation, the first variant calculates on 24-hour steady energy supply, the second optimalized variant calculates on daily energy supply. There are the accumulation system costs estimated and also the payback period for the both variants. Additionally there is also determined minimum penalization for cost-effective operation. The last part is dedicated to changes of impact on the local grid and changes of system impacts, after the accumulation system is installed.
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Kinetic energy recuperation systems
Hapala, Miroslav ; Porteš, Petr (referee) ; Zháňal, Lubor (advisor)
This bachelor thesis deals with kinetic energy recuperation systems (KERS), which is obtained by braking, in cars and sports cars. In the first section describes the different types of systems, their function and the accumulation of energy. In the second part are some examples of use in passenger transport and in motor racing. In the conclusion are summarized their advantages and disadvantages and their contribution to the future ecology of automotive traffic.
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Modeling of rigid body rotation movement in space
Komůrková, Lucia ; Kotoul, Michal (referee) ; Franců, Jan (advisor)
This bachelor thesis is focused on rotation movement of rigid body in space. It is described rotation matrices and their characteristics. It is devoted to Euler angles representation of rotation in space and introduced Euler kinematic and dynamic equations. Moreover, it indicates the numerical and analytical method for solving these equations for special types of flywheels.
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Theoretical Concept of Power Drivetrain in Human Powered Vehicle
Frank, Boris ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
Thesis is aimed on regeneration braking systems in human powered vehicle, which uses a flywheel as an energy storage medium. In the beginning is research about design and usage of flywheel energy storage systems in vehicles. Research about possibilities of continuously automatic shifting in HPV is also accomplished. Practical part deals with design of flywheel and FEM analyses of it. Also take into account practical aspects and problems of designing kinetic energy recovery system in bicycle. In energy balance thesis appreciate contribution of practical application of this system.
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Kinetic energy recuperation systems
Hapala, Miroslav ; Porteš, Petr (referee) ; Zháňal, Lubor (advisor)
This bachelor thesis deals with kinetic energy recuperation systems (KERS), which is obtained by braking, in cars and sports cars. In the first section describes the different types of systems, their function and the accumulation of energy. In the second part are some examples of use in passenger transport and in motor racing. In the conclusion are summarized their advantages and disadvantages and their contribution to the future ecology of automotive traffic.
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INSTALLATION REGENERATIVE EQUIPMENT INTO A VEHICLE
Svršek, Michal ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
The aim of this bachelor thesis is to prepare an overview of current knowledge and trends in energy recovery system of motor vehicles. The content is primarily a function of basic system, components and recovery of kinetic and thermal energy. The next section deals with the built-in specific device in a vehicle with an evaluation in terms of economic and environmental returns.
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Nonconventional Utilisation of Wind Energy
Zajíc, Josef ; Turek, Vojtěch (referee) ; Jícha, Jaroslav (advisor)
The thesis considers utilization of the wind energy as source of energy for the production of hydrogen. In the first part, there is described the types of wind engine specialized especially on screw wind engines and their construction. After that follows the description of dilemmas usage of electric energy addicted in time and with it connected problems with accumulation elektricity by the help of various methods. The final part of the thesis is than addicted to statistic evaluation of wind conditions, description and suggestion of the equipment hydrogen management.
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