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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Účinnost odvodu tepla parního generátoru JE Dukovany při nízkých hladinách / The heat dissipation efficiency of the steam generator Dukovany at low water levels

Veselý, Jakub January 2017 (has links)
The goal of this thesis is to simulate the course of events during Dukovany Nuclear Power Plant blackout and to determine the optimal process of cooling down the cold branches of the primary circuit loops to secure the maximum amount of the primary fuel needed for the residual heat outlet so that the operating staff has as much time as possible for renewing the electric power supply. The first part of the thesis describes nuclear power plants built in the Czech Republic and in the world as well as reactor blocks whose construction is being considered. The detailed description of Dukovany’s steam generator is shared in chapter three. Following chapter summarizes blackouts that occurred at power plants around the world, events that might have led to blackouts in the Czech Republic, and it also describes current approach to blackout problematics at Dukovany Nuclear Power Plant. Chapters six and seven contain the core of the thesis. That includes detailed description of a mathematical model explaining the behaviour of a reactor block during blackout as well as the analysis of the results found.
62

Systém ucpávkové páry pro parní turbínu / Gland steam system for a steam turbine

Skala, Šimon January 2017 (has links)
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.
63

Parní turbina / Steam turbine

Pohořilský, Marek January 2017 (has links)
The master thesis deals design of condensing steam turbine in the heat scheme. The content of the thesis is divided into five parts. The first part describes the design and preliminary calculation of turbine heat balance in which the turbine is to be operated. The second part is dedicated to the preliminary design and detail calculation of control stage. The control stage is solved witch impulse blading. Next part describes the design of reaction blading type which is divided into 5 flow channels. This design is followed by the design of the last stage twisted blade geometry. Comparison of the efficiency results stage is made to the designated geometry of the last twisted blades and the preliminary design of the turbine stage, where the prismatic blade type was considered. Strength calculation is performed for the design of the last rotor blade and evaluated by Goodman and Langer criteria. The last part outlines evaluation of turbine design and technical background documentation of last stage blades is processed.
64

Návrh roštového kotle s přirozenou cirkulací na spalování RDF / Design of steam boiler with grate firing burning RDF

Basov, Mykhailo January 2017 (has links)
This thesis deals with a project of steam boiler to combustion of refused-derived fuel. Considering the required fuel and output parameters of the steam was made the thermal calculation of boiler with it design and an individual calculation of heat exchange surfaces; hydrodynamic and aerodynamic calculations of the steam boiler.
65

Oprava turbínové skříně / Repair of the turbine housing

Jelínek, Tomáš January 2017 (has links)
This diploma thesis deals with the repair of a steam backpressure single-stage turbine. This thesis is assigned to a specific Spilling turbine case. A revisional report of this turbine with repair or exchange suggestions of demaged turbine parts is processed. In addition, a simulation of the contact pressure is carried out on the split plane of the housing. Structural modifications are designed and simulated to increase the parting plane's tightness. Further, the calculation of the tightening torque of the split plane is performed and a control thermodynamic and strength calculation of the labyrinth seals is performed.
66

Kotel na spoluspalování plynů / Boiler for Co-combustion of Gaseous Fuels

Mandelík, Ladislav January 2018 (has links)
The topic of this diploma thesis is to design the co-firing of blast furnace gas and coke-oven gas. First, the stoichiometric calculation for the gas mixture was made. It is followed with the determination of basic measures of heating surfaces and with their thermal calculation. The part of the work is also the drawing documentation of the boiler.
67

Paroplynové zařízení se vznětovým spalovacím motorem / Combi -cycle with Diesel Engine and Steam Turbine

Bouše, Richard January 2018 (has links)
This master’s thesis deals with the possibility of increasing efficiency of energy blocks with combustion engines by the combination of the Sabat and Clausius-Rankine cycle into the combined cycle. In the thesis is briefly described the principle of the function of the auxiliary device, which can increase the efficiency of the combustion engine. This device, which consists of a waste heat boiler and two turbine modules, is designed using calculations. Both turbine modules are prepared with drawing documentation and there are described important structural elements. Each key part of the thesis is given by a brief theory, so the basic theory of combustion engines, waste heat boilers and steam turbine are described.
68

Analýza napjatosti a pevnostní kontrola tělesa ventilu parní turbíny / Stress and strength analysis of steam turbine valve

Kořínek, Tomáš January 2018 (has links)
This diploma thesis deals with the determination of lifetime and computational modeling of stress strain states arising in the body of the steam turbine valve. Due to the high temperature of the inlet steam, the creep of the material which fundamentally affects its final lifetime is also considered in the calculation. The lifetime is evaluated by four different procedures using the finite element method via the ANSYS software. The results are compared at the end of this work. One of the chapters is focused on solving the problem of the creep in the ANSYS software environment.
69

Parní turbína / Steam turbine

Ondrůj, Jakub January 2019 (has links)
The aim of this diploma thesis is a design and thermodynamical calculation of a steam condensing turbine with one controlled steam extraction and assigned technical specifications. Technical specifications are turbine inlet temperature 440,0 °C, pressure of inlet steam 38,0 bar(a), pressure in controlled steam extraction 13,0 bar(a), mass flow rate of steam in controlled steam exraction 0,0-40 t/h, temperature in deaerator 105,0 °C and temperature of cooling water in condenser 25,0 °C. Designed steam turbine works in a Rankine-Clausius cycle with a water-cooled condenser, system of low-pressure feed water heater, feed water tank with deaerator and steam boiler. Turbine was designed with regular turbine stages with reaction type of blading and with two regulation stages with impulse blading. An extraction turbine map of the steam turbine is shown in the last chapter of this work. Final parameters of steam turbine are power of 21,7 kW, internal efficiency of turbine 85,1 % and reheat factor 1,048.
70

Návrh typu a zapojení parní turbíny pro konkrétní lokalitu / Type design and flowchart of a steam turbine for a specific location

Kalina, Leoš January 2019 (has links)
This master's thesis is deals with type designing and implementing the steam turbine to the machine part of heat plant in reconstruction. The thesis consists of two parts. First part is theoretical explanation of the heating industry, steam turbines, thermal cycles and components of thermal power plants. Second part of the thesis describes the design and calculation of thermal diagrams based on turbine parameters, which were provided from Tenza, a.s. tender. There is a simplified calculation of technical-economic study in the conclusion of the thesis. The thesis output is recommendation of single final implementation solution for customer.

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