National Repository of Grey Literature 54 records found  previous11 - 20nextend  jump to record: Search took 0.00 seconds. 
Measuring and analysis of non-harmonic signal in LabVIEW
Potyš, Jiří ; Janda, Marcel (referee) ; Huzlík, Rostislav (advisor)
This thesis will be concerned with using the program LabVIEW for measuring and analyzing of non-harmonic signals. An introducing of the bachelor thesis present a strict summary. The second chapter describe the program LabVIEW, its abilities and application for virtual instruments. The third part describe possibilities of using the frequency filters in signals area. The fourth part will be included the theoretical basics of the Fourier transform, its use and possible applications in LabVIEW program and the use of window functions. The fifth chapter outlines the measurement of effective values of different types of signals. The sixth chapter contain information about the measurement of active power. The seventh chapter describe the plan of the measurement program and the results of calculated and measured dates of this program. The final part make evaluating of the results of this bachelor thesis in comparison with a real appliance Yokogawa WT 1600 for analysis of signals.
Steam Turbine for fossil power plant
Třináctý, Jiří ; Fichtl, Richard (referee) ; Fiedler, Jan (advisor)
This thesis deals with design is condensing steam turbines burning fossil fuels with nominal capacity of the generator of 250 MW with steam reheating and regenerative eight uncontrolled extraction points. The turbine consists of two bodies: a combined high-intermediate pressure section and low pressure parts with dual way outlet down into the water-cooled condenser. Work includes calculating thermal scheme for 100% and 75% capacity, specific heat consumption calculation and design of the flow HP-MP body. Further strength control and basic engineering design of high-medium- work completed by longitudinal section. Achievements are at the end of work compared with work 3a and the conclusion summarizes the advantages and disadvantages of the concept.
Steam turbine
Pokorný, Tomáš ; Novotný, Zdeněk (referee) ; Fiedler, Jan (advisor)
Condensing steam turbine. Master's thesis of master's studies of 2th years. This master's thesis is technical research. The contents of this technical research are an analysis of a mechanical equipment of that are used for condensing steam turbine, thermodynamic calculations of passage channel for specified inlet and outlet conditions of steam, design and construction, drawing of the turbine axial cross section, operating scheme of turbine and economic analysis of operation.
Design of all-terrain vehicle
Brostíková, Amálie ; Karásek, David (referee) ; Rubínová, Dana (advisor)
This diploma thesis deals with design Quads. Specifically, a type of terrain utility quad, often referred to as the ATV. To drive the machine uses two electric motors. The ultimate designer's proposal responds to the significant social trends that support the economy and ecological design. These parameters together with the yield of the machines are non-traditional solutions to this type of field machinery.
Thermoelectric Power Generation System
Brázdil, Marian ; Nerud, Pavel (referee) ; Pospíšil, Jiří (advisor)
In the last decade there is a rising interest in thermoelectric applications. Thermoelectric generators enabling the direct conversion of the heat into the electricity become attractive. This fact is caused by the demands of environmental operation and saving primary resources. Scientists intensively investigate and develop new materials and structures suitable for these applications. The efficiency of the thermoelectric conversion progressively increases. Unfortunately we have no available materials with sufficient thermoelectric properties which could provide cost-competitive price. Thermoelectric generators seem to be useable devices. For example, in case of the unused waste heat using of the thermoelectric generator can increase the overall effectiveness of the unit despite the low efficiency of the generator. This master thesis deals with the issue of the Peltier modules representing the main part of the thermoelectric generators. The physical principles and structures of the thermoelectric modules and the possibility of thermoelectric power production are described here. In the practical part of this thesis the design of the low power generator utilizing waste heat from biomass boiler Verner A 251.1 is proposed.
Design of motorcycle
Čípek, Roman ; Karásek, David (referee) ; Zvonek, Miroslav (advisor)
This diploma thesis deals with design proposal of the motorcycle. Specifically deals with motorcycle stated for city and its´ wide surroundings. Its´ character most corresponds to group of motorcycles called Naked bikes. As a propulsion system is, unconventionally, chosen the electromotor. This kind of propulsion system currently slowly starts to be connected also with motorcycles. For many people this connection is inconceivable or even unacceptable. Final design proposal respects choosen kind of propulsion system and group of motorcycle and it shows how can be these two elements joined together creating modern, attractive looking motorcycle.
Energy balance in wastewater treatment plants
Novotný, Jan ; Raclavský, Jaroslav (referee) ; Hluštík, Petr (advisor)
This masters thesis is dealing with energetic evaluation of selected municipal WWTP – WWTP Polička. First chapter, introduction explains basic terms and goals of thesis. Second chapter explains energy audit, energy audit process its scope and contents. Third chapter deals with assesing life cycle using LCA (life cycle assesment). Fourth chapter deal with energy consumption at WWTP in Czech Republic as well as in the world. Fifth chapter describes technology of WWTP Polička and its fundamental objects. Sixth chapter is assesment of WWTP Polička from hydraulic point of view and assesment of selected machinery. Further there is summation of capital and operational costs followed by capital investment return.
Stabilized operation of the 400 kV power line
Jurča, Ondřej ; Bok, Jaromír (referee) ; Blažek, Vladimír (advisor)
This thesis deals with methods of solving lines under voltage levels of a very high transmission voltage and extra high voltage. The first, theoretical part of this paper analyses different methods how such lines are solved. In particular, an accurate solution is provided simulated by means of a line with evenly distributed parameters, and an approximate solution simulated by means of a line with lumped parameters. Furthermore, special cases of steady running conditions of the line are reviewed, such as no-load running, short-circuit run and line operation with natural load. In conclusion of the theoretical part is given a general method of solving an extra-high-tension and extra high voltage network; also, some graphical methods of solving such networks are shown including their brief description. The second, practical part of the present paper involves application of the above mentioned methods of solution on a specific line with given parameters, solving conditions at the beginning of the line under steady running conditions and in special cases of the line operation. The conclusion of the thesis summarises the obtained results and provides final assessment of the individual methods of solution in terms of calculation accuracy.
Power supply of electrostatic separator
Broďák, Kamil ; Pazdera, Ivo (referee) ; Huták, Petr (advisor)
The diploma thesis focuses on the problems of electric power precipitators. Due to their current dominant position, the work concentrates on the sources of single phase transformers operating at the frequency of 50 Hz controlled by thyristors. The first part describes the electrostatic precipitator and its principle. This is followed by a brief insight into the proposal for an electrostatic precipitator. The work also explains the high voltage source that is divided into a transformer with a rectifier and into a control box with power circuits and control circuits that provide the power supplied by a transformer. The work also offers an explanation of the HV source system that operates at different conditions. The last part suggests a proposal for cooling cabinet including thyristors, for power line control box resources, for a supply line and a line to the transformer.
Automotive Alternator Innovation
Volek, Martin ; Hýsek, Roman (referee) ; Hájek, Vítězslav (advisor)
The work deals with the analytical electromagnetic design of automotive claw-pole alternator 14V/120A. This design is verified in program Maxwell with a RMxprt tool. The results of both calculations are compared. Designed alternator is also compared with the results measured in the laboratory on the alternators of similar type. Furthermore, there are analyzed individual power losses of machine and listed options of reducing these losses, which results in an increase in overall efficiency.

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