National Repository of Grey Literature 29 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Application of surge protection in LV networks
Brtnický, Pavel ; Šlezingr, Jan (referee) ; Bátora, Branislav (advisor)
The work include the issues about surge protection in low voltage networks. The first part give a theoretical analysis of the surge protection, where is described own creation and basic division. The second part give a inner and outer protections, where is characterized, what protections contain and methods, with which to design protection. In the third part is few words about computer softwares, which supports dimensioning and design protections. The second half of the work give a specific design of protections for fire station, first there are determinated risks for building without surge protection and after for building under surge protection, design of outer protection together with verification and design of inner protection.
The possibilities electricity savings of refrigeration and cooling equipment according to the distribution rate - the cold storage
Pálka, Marek ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This bachelor´s thesis is focused on the possibilities of electricity savings of the freezing equipment, which would work only in low distribution rate and it would be disconnected from the power source in the high distribution rate. In this work, a total research in the field of refrigeration and cooling equipment, both technological circuits, as well as the principles of temperature regulation and food storage process is made. Another part of the work is focused on freezer testing standards and regulations. Much of the work is devoted to the experimental measurements, in which different types of rates on the given freezer equipment and with them associated the possibilities savings relative to other rates are measured. Another objective of the experimental measurement is to find out the temperature behaviour in the various parts of a freezing apparatus according to the switching time of the rates. There are overall experimental measurements evaluated and the possibility of electricity savings in direct reliance to the processes ongoing in the food during long term storage in the freezer in the unstable storage temperature In the conclusion of the work.
Electromagnetic compatibility testing procedures
Kohůt, Miroslav ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
The theme of this work is to test the electromagnetic compatibility of appliances, work therefore the issue of electromagnetic compatibility and interference testing is mainly based on the interference sources (appliances) and electromagnetic susceptibility testing of appliances to interference. The work contains a description of each type of measurement of disturbances and immunity to both low frequency and high frequency. Bachelor thesis in its practical part deals with the implementation of selected testing according to applicable standards at the premises of the laboratory Institute of Electrical Measurement Electrical Power Engineering FEEC in Brno.
Small Hydropower Plant Project
Košíček, Jiří ; Šlezingr, Jan (referee) ; Radil, Lukáš (advisor)
This bachelor thesis consists of a description of the legislative framework of small hydropower plants, which is necessary to know for their operation and construction. It also describes the general theory of small hydropower plants, specifically describes the individual technical elements - weir, gratings, sluice gates, ambushes, sand traps and stones, open flume, pipes and stilling basin. Another part assesses the economic feasibility of small hydropower plants for specific hydrological conditions and design of turbines on suitable work flow. The main part is devoted to specific proposal small hydropower plants in the village Tulešice by the river Rokytná.
Calculation and design of electric underfloor heating according to CSN
Urbánek, Jaroslav ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This thesis deals with the issue of electric underfloor heating and various types of heating elements such as heating cables, heating mats and heating foils. The thesis also contains elements that are important in the implementation of underfloor heating. Part of this work are listed standards addressing the issue of underfloor heating. In the final part there is a proposal of underfloor heating and photovoltaic system for a family house with the economic evaluation as an integral part of the issue.
Infradiagnostics of Distribution System Apparatus
Kostkan, Petr ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
The bachelor thesis deals with utilisation of thermovision in the field of diagnostics of equipment and components of the electricity distribution network. The aim of this work is to determine the most troublesome components by using results of individual thermovision measurements. It is achieved by processing data from thermovision measurements and subsequently establishing a database of defects. In the next stage, the most defective components and equipment are analysed and measures aimed to improve reliability and trouble-free operation of distribution networks in the Czech Republic are suggested.
Analysis of Smart Grid devices
Kolacia, Tomáš ; Šlezingr, Jan (referee) ; Radil, Lukáš (advisor)
This work deals with smart grids and smart metering in power grids. The first part of the thesis is focused on the comparison between classic topology of electrical grid and smart grid concept including the benefits, which could be achieved. The other parts of smart grid concept are described as well, such as energy storage and electromobility including charging points infrastructure. The second part of the thesis deals with smart metering devices and it describes routing protocols for smart grids. The following chapters summarize practical experience with addressed issues in Europe and in the Czech Republic. The last part is dedicated to evaluation of smart metering implementation in the Czech Republic.
Design of island photovoltaic system
Halás, Andrej ; Radil, Lukáš (referee) ; Šlezingr, Jan (advisor)
This thesis systematize a design of stand-alone photovoltaic systems, provides a general view of the current possibilities and represents simple and lucid manual for designers. The first part is dedicated to the description of parameters, functions, comparison of the elements of the off-grid system and selection between the most commonly used technologies. The thesis focuses attention on the right selection of appropriate elements to create an effective and safe system. The second part is peripherally dedicated to law related to installation of systems of this type. The result of theoretical practice and the last part is an example of sizing a small island system.
Determination of the energy potential of autonomous object and its use
Dohnal, Josef ; Šlezingr, Jan (referee) ; Baxant, Petr (advisor)
The aim of this bachelor´s thesis is to refer briefly about possibilities of obtaining energy from locally available resources for autonomous object and the definition of the term – an autonomous object. This bachelor´s thesis mentions processes how to gain energy from different sources, possibilities of their implementation (from a legislative perspective) or suggestions on how to save gained energy. We are concerned in the autonomous objects primarily and in the acquisition of heat and electrical energy, so the thesis is also divided into two main subsections dedicated to determining the required amount of the energy that would cover our demand for it. The next section briefly discusses the construction of Savonius wind turbine generator which we can build ourselves. This is a hybrid system that consists of a solar photovoltaic panel and the wind turbine with the appropriate electrical devices. Construction of Savonius wind turbine is documented in the chapter Appendix, where you can find photographs showing construction phases. It should be noted that the construction is not completed and the determination of some parameters were not possible technically at home. These measurements would be flawed. Individual issues are then briefly explained and described how they would be in the ideal case. In conclusion, the procedure for calculating is outlined by the method called NPV (Net Present Value), which is often used.
Electrical machines fault simulator
Krátký, Michal ; Krbal, Michal (referee) ; Šlezingr, Jan (advisor)
The goal of this bachelor’s thesis is the laboratory task focused on vibrodiagnostics of rotating electrical machines. The thesis is divided into theoretical and practical part. The theoretical part is made of information related to rotating electrical machine mainly its faults and technical diagnostics. Besides that the vibrodiagnostics is involved into the theoretical part as well. The practical part deals with the design of laboratory task focused on vibrodiagnostics of rotating electrical machines. There is shown how vibrations influence the machine during the operation. There is used asynchronous machine 1LA7080 and vibrometer MV-5L and noncontact tachometer UNI-T UT372 for this experiment. The second task is the starting current diagnostics. The starting current ofthe engine with the rotor asymmetry 1LA7080 and rotor symmetry 1LA7090 is going to be analyzed here. On these engines will be shown, how current flicks affectthe magnetic field of the engine in the air gap.

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