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Condensing steam turbine
Krška, Jan ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
This master’s thesis deals with the design of a condensing steam turbine for certain parameters. In the initial part of the thesis, a research on steam turbines and types of blading is carried out. The computational part of the thesis is divided into several subchapters which have been made into larger chapters. One of the chapters deals with the thermodynamic calculation of the flow section of a steam turbine for a clamp power of 5 MW, a speed of 11,000 min-1 and a pressure of 0,1 bar (a). The calculation has been optimized for several basic operating parameters that the steam boiler is capable of achieving with respect to the highest possible thermodynamic efficiency of the plant. The work includes the evaluation of the results in the form of a graph. After the calculations for all steam parameters have been performed, the point was selected which with it’s values meets the requirements for the highest thermodynamic efficiency. The optimum operating parameters of this turbine are such that the turbine at a nominal temperature of 490 °C and an operating pressure of 65 bar (a) achieves a clamp power of 5190,220 kW. The thermodynamic efficiency of the steam turbine is 85,07 % and the reheat factor is 1,0634. Subsequently, basic dimensioning calculations were performed. The calculations are followed by a chapter entitled discussion where some important steps are evaluated. The master’s thesis also contains an appendix. It is a conceptual longitudinal section of a steam turbine.
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Steam Turbine for the Waste to Energy
Janata, Petr ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The master thesis deals with the design of a condensing steam turbine for a waste incineration plant with regulated take for a heat exchanger, which has a heat output of 15 MWt and a temperature gradient of 60/90 °C. In the thesis, a thermal scheme was first designed, which was based on the required design parameters. The maximum mass flow of steam into the turbine is 38 t/h. The pressure and temperature of the admission steam is 37 bar and 440 °C. The degassing temperature is 105 °C and the cooling water temperature at the condenser inlet is 20 °C. The following is the design and thermodynamic calculation of the turbine flow channels. The first stage of the turbine is designed as a regulatory with equal pressure blades. The rest part of the turbine is designed with overpressure blades and is divided into 6 cones, in which there are a total of 27 stages. The strength inspection of the designed blade profiles was performed. A compensating piston and a gland system were designed. Finally, bearings for the rotor were designed and then the operating diagram of the turbine was constructed. The work is supplemented by a structural drawing of the longitudinal section of the turbine.
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Condensing steam turbine for a steel plant
Pokorný, Šimon ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
Objective of the master’s thesis is the thermodynamic design of condensing steam turbine for steelworks place on frame. Steam turbine can be operated with one controlled extraction point from 0t/h to 115 t/h at terminal power 60 MWe and speed of 3 000 per minute. The entered parameters are the admission states of steam at the inlet to the steam turbine, required properties of steam in the process extraction point and temperature of cooling water with flow in water cooled condenser. At the beginning of design of the steam turbine is thermal scheme, defining state of steam in significant places and predetermined mass flow through condensing steam turbine. The following is the design of two regulatory stages with equal pressure blades. First is for High pressure stepped section and the second is for low pressure stepped section. The solution of stepped section is divided into two chapters. The first deals with preliminary determination of the geometry and the number of stages, the second is main part of the whole thermodynamics design of a condensing steam turbine. Stepped section is solved with over pressure blading set on the drum rotor. The calculation is divided into low pressure stepped section for design mode with zero process extraction point and high pressure stepped section, which is designed for off taking mode. Steam turbine is consisted of 6 cones about 32 stages. Thermodynamics efficiency in off taking mode is 86,1 % and mass flow 71,94 kg/s, in condensing mode 83,4 %, respectively 53,01 kg/s. Part of design is strength check of blades, critical speed check and design of compensating piston with the system of labyrinth glands and bearings. Thesis is supplemented by operating characteristics and longitudinal section of condensing steam turbine.
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Condensing steam turbine
Trávníček, Zdeněk ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The aim of the master’s thesis is to design a condensing steam turbine based on given inputs. Firstly, a design and computation of heat balance is made, followed by thermodynamic calculation of steam turbine channel and a design of compensatory piston of axial forces. Last part of the thesis consists of a review of a change of cooling water temperature in condensator on last turbine stages. The structural drawing of longitudinal section of turbine is included as well.
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Mathematic model of steam turbine
Kroliczek, Filip ; Dokoupil, Jakub (referee) ; Pivoňka, Petr (advisor)
The goal of this thesis was to create a mathematical model of a steam turbine based on the data acquired by measurement, and to verify its behaviour. The first part contains research, which is supposed to introduce basic principles of the steam turbine and description of important construction parts and the possibilities of control. The second part describes the experimental identification method of least squares, used for the calculation of an ARX model of the steam turbine. Finally, the last part focuses on the program environment used for creation of the mathematical model and explanation of measured data analysis process. Furthermore this segment describes the created simulation program as well as a visualisation of the dynamic processes in the steam turbine, including the design of control.
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Extraction Condensing Steam Turbine
Drápela, Jakub ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
This diploma thesis describes a design of condensing steam turbine out of entered data of vapor parameters. There is selected a reaction blading type according to a conception of the company PBS Energo PLC. The turbine has one controlled extraction and three uncontrolled ones. The work also includes a proposal of thermal scheme, bearing and gearbox assignment. Furthermore there is also made a draft design of longitudinal section turbine
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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.
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Feed Pump Condesing Steam Turbine
Uherek, Jan ; Kubiš, Zdeněk (referee) ; Fiedler, Jan (advisor)
This diploma thesis focuses on designing impulse stage steam turbine to be used as the feed pump drive. I consecutively carried out thermodynamic calculation, seals and bearings layouts, with the aim to determine the steam mass flow through the turbine. Furthermore, I conducted turbine blade toughness check-ups, determined the rotor critical rotational speed, check-up rotor critical place (bearing pin) for torsion, and created a clutch screws design. The final part of this thesis pursues the other operating states of the turbine. This thesis is amended by a mechanical drawing of the turbine transection.
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Condensing Steam Turbine C55
Borýsek, Václav ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
This diploma thesis deals with the design of a steam condensing turbine for intake steam of pressure 125 bar, temperature 540 °C and maximal intake of steam into the turbine 130 t/h. A thermal scheme is designed, including low-pressure and high-pressure regeneration, an air condenser, a feed tank and a boiler. Afterwards a thermodynamic design of a condensing turbine is made with an A-wheel type regulating stage and a stage part with reaction blades. The design of the blades is strength-tested. Then is made the design of the compensating piston and the sealing system. In the end the characteristics of the turbine for non-design steam flows is plotted. The designed turbine has a power of 34644 kW, has a thermodynamic efficiency of 85.1% and a reheat factor of 1.046.
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CFD simulation flow of steam in the unregulated extraction of steam turbine
Filip, Patrik ; Pospíšil, Jiří (referee) ; Fiedler, Jan (advisor)
Diploma thesis named CFD simulation of the steam flow in the unregulated extraction of the steam turbine is about an analysis of the balance piston impact on the area of the steam turbine, where the extraction is located. First part describes basic knowledge of the steam turbine in general. At the end of this chapter, there is a description of the solved steam turbine. Next chapter is about introduction to the CFD. Practical part deals with a construction of 3D models, meshing and setting of the boundary conditions in the program ANSYS CFX. The main part of this thesis summarizes the results of the CFD simulation and stipulates the temperature range on the extraction pipe. In conclusion, there is a recommendation how to determine design temperature of the extraction pipe influenced by the balance piston.
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