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Steam-gas turbine for emission-free storage power plant
Schubert, Vojtěch ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
The thesis addresses energy storage in the context of the ongoing energy transformation and the climate crisis. Therefore, the CCUS technologies and the possibilities of electrical energy storage are presented in the form of a literature review. In relation to these issues, the thesis also presents the concept of an emission-free storage power plant, based on a patent from SE Brno. In the subsequent parts of the thesis, an instrumentation diagram is constructed, and a conceptual design of a gas-steam turbine for the energy unit of this storage power plant is proposed.
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Steam turbine for municipal waste incinerator
Holík, Michal ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The thesis focuses on the design of a condensing steam turbine for a waste incineration plant. The design includes the supply of heat to the district heating system with a temperature gradient of 55/75 °C and an output of 15 MWt in the summer period, and the supply of heat to the district heating system with a temperature gradient of 65/120 °C and an output of 45 MWt in the winter period. The first stage of the turbine is a controlled stage with impulse blading. This is followed by the stepped section, which consists of 7 cones with a total of 40 stages. These stages were subsequently strength-verified. A balancing piston, gland steam system, and bearings were designed. Finally, the operational characteristic of the turbine was constructed.
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Steam turbine for biomass power plant
Urbánek, Roman ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The master's thesis deals with the design of a condensing steam turbine for a biomass power plant with off-takes for heating heaters with a temperature drop of 60/80 °C in summer and 70/125 °C in winter, and off-takes for low-pressure regeneration. The nominal thermal output of the heat exchangers is 0-10 MWt in summer and 0-50 MWt in winter. The thesis includes a detailed design of the flow parts of the steam turbine, from the design of the control stage, the staged part of the turbine, and the strength verification of individual stages to the design of the balancing piston, sealing system, and bearing design. In conclusion, the operational characteristics of the proposed steam turbine are depicted.
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Steam turbine for biomass power plant
Chumchal, Ondřej ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
This thesis deals with the design of a steam turbine for a biomass unit in two alternative solutions, with and without gearbox, for a given 30 MW clamp power. The design of both solutions works with the same heat cycle scheme, but the parameters at the low-pressure heater or at the inlet to the feed tank differ depending on the steam conditions in the turbine intakes. In the first part of the paper, a thermal balance scheme with low pressure regeneration is proposed and the steam flow through the turbine is calculated. Both variants have three unregulated bleeds, one of which is led to the degasification feed tank. For both variants a regulative stage is designed using impulse system of blading and a stage section using reactive blading. The work also includes the determination of axial force and the associated design of the balancing piston and gland steam system. Appropriate bearings were selected for the given force stresses. A graphical comparison of the two variants is presented in the paper, together with the operating characteristics. Finally, a conceptual section drawing of the steam turbine was made. The result is a turbine without gearbox with 36 stages and an efficiency of 82%, then with gearbox at 5400 min-1 with 27 stages and a thermodynamic efficiency of 86.7%.
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Modernization of biomass heat plant.
Sedlák, Martin ; Fiedler, Jan (referee) ; Fiedler, Jan (referee) ; Skála, Zdeněk (advisor)
The thesis examines the suitability of a CHP project in Bystřice nad Pernštejnem, a small town in Vysočina region, Czech Republic, which is currently supplied by biomass central heating. It reviews situation and availability of renewable energy sources and opportunities for CHP both in the Czech Republic and in Europe, including the context of current global developments. The opening chapters are followed with the renewable energy project for Bystřice nad Pernštejnem itself. The current technology, availability of biomass fuel for a potential future project, and possible development of energy sources in the town are analysed. Three alternative solutions for the CHP plant are suggested, with proposal for the technology and economic analysis, and possible future steps of the town council are discussed.
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Condensing steam turbine for a sugar factory
Kovaříček, Jakub ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The main topic of the thesis Condensing steam turbine for a sugar factory is a comparison of the methodology for the design of twisted blades of the last low-pressure stages of a condensing steam turbine. The work is divided into the five parts. In addition to the Dunham, Pritchard and Trigg methodologies described in detail, the research in the first part also deals with other, briefly described methods. In the second part, a preliminary calculation of the thermal scheme in which the turbine should be operated is performed. An air condenser is selected behind the turbine. The third part is devoted to the preliminary and detailed calculation of the control degree. The next part deals with the preliminary thermodynamic calculation of the turbine, which has an overpressure blade and is divided into seven flow cones. The content of the following fifth part is a detailed design of the geometry of twisted blades of the last stage. The importance of twisting the blades in terms of efficiency is described here and it is possible to look at the issues of the whole process. The profile of the blades is modeled in detail using two methods and then compared on the mean diameter with the third method, which is modeled only in one section. While the Dunham method is the most time-saving, the generated blade shape is not ideal compared to the more time-consuming methods. The appendix contains a simplified drawing designed for stator and rotor blades.
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Evaluation of heat pump operation data
Charvátová, Marie ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the issue of heat pumps as devices using low-potential heat of the surrounding environment for heating of buildings. In the theoretical part of the thesis there are described various types of these devices, the sources of low-potential heat and the possibilities of heat energy accumulation. The practical part of the thesis is focused on processing and evaluation of operational data of air/water heat pump used for heating of family house and assessment of importance of accumulation tank in heating system. Part of the thesis is also a proposal of optimization of heat pump control.
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Increased performance turbo machinery in EDU the NPR changing
Bašta, Tomáš ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
The Diploma thesis on the topic of Increased performance turbomachinery in EDU the NPR changing describes in detail some important devices of technology system of the secondary circuit of Dukovany Nuclear Power Plant together with their task in the thermal circulation. There is a computational model of secondary circuit according to the present thermal schema created in the main part of the thesis. At the end of the thesis, the possibilities of the increase of the terminal power of turbomachinery, specifically of the turbogenerator, by the exhange of low-pressure heaters (NPR) are stated. Obtained results are documented by drawings of the thermal schemes.
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Gland steam system for a steam turbine
Skala, Šimon ; Šrůtek, Petr (referee) ; Fiedler, Jan (advisor)
The diploma thesis deals with preliminary design of condensing steam turbine with three unregulated steam outputs and its gland steam system particularly its description and design. The steam parameters in key outputs were determined in heat balance. The gland steam system parameters were calculated for different operating conditions. It also describes influence of pressure on performance of turbine in gland steam system. Finally, the inquiry sheet for gland steam system device was created based on calculated values.
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Steam turbine for biomass heating plant
Cmajdálka, Ondřej ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
This master thesis deals with the design of a condensing steam turbine for a biomass block burning wood chips with one regulated take for a hot water heat exchanger. The temperature gradient for the hot water is 90/110 ° C. The thesis guides through the designing proces of a steam turbine from the thermal scheme proposed according to the specified parameters, through the design of the regulatory stage and the stage part of the turbine, including strength calculation, to the design of the compensating piston, seals system and bearings. Finally, the operating characteristic of the turbine is constructed.
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