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Comparison of single-cylinder and double-cylinder steam turbines
Bunček, Patrik ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The master thesis deals with design and comparison of condensing steam turbine for steam-gas cycle for single-cylinder and double-cylinder body with air condenser at its end, one regulated take and ability to use additive steam. Thesis is based on the calculation of thermal scheme which is followed by a preliminary and subsequently a detailed design of steam turbine. Thermodynamic efficiency for single-cylinder turbine was calculated at 93,28 % with terminal power 136,2 MW. The design procedure was repeated for a double-cylinder body. Calculated terminal power for two-cylinder turbine was 134,4 MW with thermodynamic efficiency of 92.1%. By dividing turbine into two rotors resulting low-pressure turbine has a smaller rotor diameter, a longer blade and at the same time a larger number of stages. For double-cylinder turbine, it was necessary to consider twice the number of seals and radial bearings. Due to the increase in flow diameter of low-pressure turbine, losses related to the geometry of the stage increased. Thesis is supplemented by a section drawing of steam turbine with higher efficiency.
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Boilers for house heating
Kolář, Jakub ; Kracík, Petr (referee) ; Baláš, Marek (advisor)
This bachelor thesis is focused on topic cover liquid fueled boilers with power up to 200 kW used for the heating family house and block of flats. Distribution and characteristics of liquid fuels, formation and processing of oil as raw material in liquid fuel production is reviewed in the introduction. First part of this thesis is mainly focused on heat oils. Boilers applicable to house heating, theirs energetic score and specificity and types of liquid fueled boilers are reviewed in second part. In the last part of this thesis is maked a calculation and shows comparative economical computation of convenient types of boiler application.
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Steam Turbine for Pump Drive
Bureš, David ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The aim of this diploma thesis is the design of a condensing steam turbine to drive a pump with a mechanical power of 9 MW. Based on the parameters, a thermodynamic design of the flow channel is performed, including the strength control of the blades, taking into account the API 612 standard. To compensate for the forces arising during operation, a thrust bearing and radial bearings are designed. At the end of the computational part of work, the operational characteristics of the turbine are performed. The appendix contains an idea drawing, which shows a section of the turbine.
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Calculation of a heat exchanger in a nuclear power plant
Borovička, Matej ; Kracík, Petr (referee) ; Milčák, Pavel (advisor)
The main theme of this bachelor thesis is a theoretical and computational description of the steam generator. The first chapter deals with a brief description of nuclear power plants. Particular attention is paid to the power plants of the VVER type, which are used in the Czech and Slovak Republic. The theoretical part of this thesis describes the individual components which are important for the operation of a nuclear power plant. The main part of this thesis depicts horizontal and vertical steam generators. Moreover, the PGV-213 type of steam generator that is used in the Dukovany nuclear power plant is more precisely explained. The computation part of this thesis is devoted to the balance and heat calculations of the steam generator. At the conclusion of this thesis, the performance of the steam generator during changes in operating conditions is also described.
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Cogeneration
Krčálová, Petra ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The bachelor thesis describes the design of CHP (combined heat and power) co-generation unit for a particular object. The first part of the thesis is a theoretical introduction to the importance of co-generation it’s advantages and / or disadvantages, the possibilities of it’s use and description of the technology of co-generation plants. The second part of the thesis contains the entire design of cogeneration unit for several different types of the coverage of energy needed. The economic evaluation was used (with prices paid for individual energies are determined by the ERU for 2013 and 2014) to select the most suitable type of the co-generation unit and therefore the best investment.
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Bypass steam turbine system
Molák, Filip ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
The master’s thesis deals with the bypass system of steam turbine, especially about its heating during normal operation and cold start up. At the beginning of work, a preliminary thermodynamic calculation of condensing steam turbine with two uncontrolled extractions is made. This is followed by theoretical description and design of bypass system and design of heating during normal operation and cold start-up. The main goal of thesis is optimalization of heating, when the heating branch is connected back to turbine supply line. In the end, all options of heating are compared in terms of power output.
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Steam Turbine for Waste to Energy
Hodonský, Lukáš ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
The thesis deals with the design of the steam turbine for a waste incinerator. First, the concept and design of the machine is discussed. Following part is the steam turbine thermodynamics calculation, which is the main part of the thesis. My work also contains calculation of axial force and a simplified calculation of the gearbox. The design sections of individual modules and drawing of a disposition of a steam turbine are made on the based of the calculation.
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Condenser design of a nuclear power plant
Ondráček, Marek ; Kracík, Petr (referee) ; Milčák, Pavel (advisor)
In the beginning of the bachelor’s thesis is a brief view on nuclear energy. The next part of the thesis presents the principle of Nuclear power plant Dukovany and it explains the primary, secondary and tertiary circuit. In the secondary circuit it describes the condensation system and its most important components. Furthermore, the work focuses on a description and a calculation of the main condenser in Nuclear power plant Dukovany. The calculation focuses on a size of heat transfer surface and observation of condensation parameters when changing operation conditions.
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Balancing turbines rotor
Peterka, Zdeněk ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
This bachelor’s thesis is specialized search dealing with issues of balancing turbines rotors. The first part of this work is devoted to general problems of balancing turbines rotors and basics of balancing turbines rotors. In the second part of this thesis there is a documentation of balancing device so-called „shelter“. The third part already discussed about the very processes of balancing turbines rotors. In the last part there two examples of practical balancing turbines rotors.
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Technologies for electricity storage
Pochylý, Jiří ; Kracík, Petr (referee) ; Škorpík, Jiří (advisor)
The point of this work is to compare and to describe basic types and principles of electric storage systems. With the increasing imbalance between consumption and generation of electric energy there is a need for integration of electric accumulators to the electric grid. Technologies for electric energy storage can be divided into several types, which differ in form and conversion of energy. These technologies are suitable for specific industrial applications.
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