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Uninterruptible Power Supply
Mrázek, Petr ; Harabiš, Vratislav (referee) ; Sekora, Jiří (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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Analysis of power generators operating parameters
Kouba, Robert ; Hromádko, Jan (advisor) ; Mařík, Jakub (referee)
The theoretical part of this thesis gives a basic description of construction parts, functions, use and basic division of power generators. Fundamental indicators that play their role in electrical engineering and in the issue of power generators as such are also mentioned. For instance the requirements for the reliability of the electrical energy, or possible defects on the electricity network while using a backup power supply. The historical development of engines has also got its space in the thesis, mainly due to them being the fundamental functional element of mobile power sources. The practical part aims on the choice of a suitable power generator for the canteen building of Czech University of Life Sciences Prague, according to given operating parameters. The power generators have been described with the help of RENTAL company, who is also the provider of said generators. The conclusion shows an economic evaluation of the pros and cons of buying a new power generator or just renting one, and it also describes the estimated evolution of power generators in general.
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Electric power generator with steam engine
Marčík, Silvestr ; Foral, Štěpán (referee) ; Baxant, Petr (advisor)
My bachelor thesis is focused on design and production of power generator driven by single-acting piston steam engine. Thesis includes introduction into the issue of steam engines and their history and it describes construction of their individual elements. The next part of the thesis describes manufacturing process of electrical and mechanical components and their optimization for given system. Thesis also includes research and development of new components of the steam engine in order to increase its efficiency and it describes possibilities of using the energy for small applications. The result of the thesis is a measurement and commissioning of the entire system. In conclusion achieved results and options of modification of steam power generators are discussed.
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Generators for renewable energy
Prokop, Jan ; Macháček, Jan (referee) ; Baxant, Petr (advisor)
The bachelor thesis deals with the topic of generators, which will use alternative sources of energy instead of fossil fuels. The work is focusing on mechanical energy conversion. Introductory part of the text summarizes the requirements on the generator, properties and parameters of appliances, which will be connected to the generator, and finally the selection of suitable alternative fuels. Main part describes the process of a prototype realization. Individual parts of the device have been manufactured from a simplified technical documentation and sketches in the machine shops of the Secondary School of Electrotechnical Engineering on Trnkova street, and from these parts a functional generator prototype has been assembled. This prototype consists of two separate parts: a propulsion unit and an alternator with accessories, including appliances. On this prototype an efficiency measurement has also been carried out. Furthermore, the work includes animations of device functions created in modeling program SolidWorks 2012. Prototypes are based on a known principle of a steam engine and, at the request of the above-mentioned school, have been adapter into a visual teaching aid. The advantage of those prototypes lies in their inexpensive and simple construction, which utilizes commonly available materials. The device works on maintenance-free principle, there is only the necessity of occasional greasing for a fluent running. In conclusion are briefly reviewed the investment and operating costs of the generator.
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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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The Autonomous House or Living Grid-off
Chlebný, Radek ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This thesis deals with energy self-sufficiency focusing on the independence of the electric grid. Basic line emanating project form a concrete proposal for autonomous energy supply system. Emphasis is placed primarily on photovoltaic systems, electric energy accumulation and selection of individual components of such a system. Another important part of the thesis is also an economic evaluation of design variations. The thesis also deals with a market research, and thereof derived benefit assessment of each technology. The accompanying chapters are then devoted to the history of autonomous life style or classification of buildings according to their energy performance.
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Vacation property in stand-alone mode
Svoboda, Jan ; Martinec, Jiří (referee) ; Suk, Ladislav (advisor)
This bachelor thesis deals with the supply of electricity for remote vacation property. It addresses the issue of how each technology of alone systems are applied to a particular object, as well as their financial page. At the end are technologies compared and the most suitable one is recommended.
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Gasoline generator for mobile robotic applications
Hrbáč, Zbyněk ; Lamberský, Vojtěch (referee) ; Vejlupek, Josef (advisor)
This bachelor’s thesis is focused on the construction of generator for mobile robotic applications. The first part provides a survey of power generators available on both the domestic and international markets. In the second part is an overview of applicable electrical machines in the generator mode. There is a description, principle of operation and specifics of each motor and a possible regulation of an output. The third part deals with the actual construction of a testing model. The BLDC (brushless DC) motor with output power of 660W was used as a generator.
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