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Design of the flow chart of Electro-Thermal Energy Storage unit with sCO2 circulation and calculation of its parameters
Suchomel, Josef ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
The most commonly used medium for most cycles is water. However, from an ecologi-cal point of view, carbon dioxide is a more suitable medium. Firstly, there will be less water consumption, and secondly, it is a monitored greenhouse gas whose quantity is required to be regulated. In this thesis, a heat plant is proposed, whose medium is CO2. Moreover, it is an electro-thermal energy storage unit, which could play an important role in the regulation of the energy system. The aim of the thesis is first to summarize the current knowledge of the given issue, and then to design a flow chart of the electro-thermal energy storage unit, including individual cycles and basic dimensions of turbomachinery.
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Labyrinth seals for turbines and aircraft engines
Studnička, Ondřej ; Škorpík, Jiří (referee) ; Šnajdárek, Ladislav (advisor)
This bachelor's thesis focuses on the development and optimization of labyrinth seals used in turbines with the goal of improving their efficiency and reducing energy losses. The work combines theoretical approaches with practical application. In the theoretical part, existing seals and their most advanced types were analyzed. Subsequently, several prototypes were designed and manufactured using new unconventional technologies. The issues related to production were described. Finally, the seals were experimentally measured and evaluated.
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Options for Radioactive Waste Disposal
Veličková, Andrea ; Šnajdárek, Ladislav (referee) ; Chýlek, Radomír (advisor)
This work focuses on the analysis of the problem of radioactive waste, its classification and methods for its treatment, storage, and disposal. The work describes options of disposal of radioactive waste and methods for its safe disposal. Waste can be classified by its physical state, half-life, radioactivity level and origin, which determines the appropriate methods for pretreatment, treatment, conditioning, storage, transport, and disposal. Short-lived wastes can be returned to the environment, while long-lived radionuclides must be disposed of in deep geological repositories in salt rock, clay, or granite geological formations. Less dangerous wastes are usually disposed of in surface or near-surface repositories. A comparison of individual disposal options shows that the surface repositories are more economical but less secure than deep geological repositories, which provide long-term isolation. Reprocessing of the spent nuclear fuel, used by advanced nations, requires specialized facility and carries risks. The safe management of the radioactive waste is the key to the peaceful use of nuclear energy. Continued research, innovation and global collaboration are essential for a sustainable future.
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Small modular reactors
Mareček, David ; Šnajdárek, Ladislav (referee) ; Kracík, Petr (advisor)
This bachelor's thesis explores a new and promising type of nuclear reactor: small modular reactors (SMRs). It begins with a brief introduction to the basics of nuclear energy, nuclear physics, and their historical development. The fundamental concepts related to SMRs, as well as the definition of SMRs themselves, are explained. The thesis then outlines the various prop-erties and advantages of SMRs. It includes a description and comparison of 9 different types of SMRs, followed by a detailed analysis of the 10 most advanced SMR projects. Additional-ly, it provides an overview of the legislative requirements for implementing SMRs in the Czech Republic. Finally, the thesis discusses the reasons for integrating SMRs into low-carbon energy and explores their potential applications.
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Heat accumulator design
Rigby, Jakub ; Šnajdárek, Ladislav (referee) ; Pospíšil, Jiří (advisor)
This thesis deals with the issue of thermal energy storage with the aim of designing an original heat storage concept using crushed rocks. The introduction of the thesis summarizes the available literature and the latest findings in the field of heat storage. It is followed by a presentation of realized projects that integrate crushed rocks as a storage material. The practical part of the thesis focuses on detailed balance and design calculations of the heat storage. Based on these calculations, an innovative heat storage concept is designed. The conclusion of the thesis summarizes the results of the numerical simulations and performs an economic evaluation of the proposed heat storage.
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Design of hydrogen jet engine to 1kN thrust
Mikulenka, Karel ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
This thesis includes a brief history of jet engines using hydrogen as fuel. Calculation of thermodynamics of small engine with thrust up to 1 kN which is in modern day used in practice drones or ballistic missiles will be conducted. Given initial parameters compressor selected is of radial type. Calculation of radial compressor and its verification in EES software. Issue of combustion chambers is presented and calculation of chamber balance is carried out. Computation of turbine and blading layout. Proposal of jet for expansion into atmosphere and engine thrust. Comparison of contemporary projects researching hydrogen propulsion in aerospace with their conventional counterparts and assessing their feasibility compared to other types of renewable fuels.
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Analysis of the condition of the K 220-44 steam turbine drainage pipeline and proposal of corrective measures
Horký, Jiljí ; Milčák, Pavel (referee) ; Šnajdárek, Ladislav (advisor)
This diploma thesis deals with the analysis of the drainage pipeline of the Škoda K 220-44 steam turbine. This turbine is operated in Dukovany Nuclear Power Plant. One part of this work is proposal of corrective measures. The aims of this work include the creation of a search for drainage, steam, erosion corrosion and mapping of defects in long-term operated drainage system. Work also includes the evaluation of measured values of the pipe wall thickness measured by ultrasonic analyzer. In addition, the work contains images created from 3D model, on which the location of defects and measurements are displayed.
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Characteristic properties of axial stages of working machines
Hejduk, Michal ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
This bachelor work is dealing with conclusion of basic characteristic of axial stages working machines. First part of this thesis presents the characteristics of principle behind every turbomachinery therefore not only the working machine but turbine as well. In the end of the first part the basic equations, which may be needed in the construction of such machines. Second part focuses on characteristic features, which are the same or very similar throughout axial turbomachinery. The last part of this thesis works with usage of different work machines in the industry. It is also mentioned here why are the axial turbomachinery work machines used instead of radial or tangential work machines
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Technologies for use hydrogen from Energiepark Mainz
Florian, Tibor ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
The goal of this bachelor’s thesis is the description of hydrogen, its production methods, subsequent use and comparison by selected criteria. In the beginning of the thesis, hydrogen is described as an element. The following chapter briefly deals with its history in energy industry and the most commonly used production technologies. The emphasis is on a Power-to-Gas facility, Energiepark Mainz. In the end, hydrogen is compared as a fuel in the automotive industry.
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Impactor for fine particle collection
Paulíková, Kateřina ; Šnajdárek, Ladislav (referee) ; Pospíšil, Jiří (advisor)
This master thesis provides an overview of fine particles contained in the air and possibilities for their analysis, measurement and capture. In the beginning, the fine particle's size and origin is described. Then, the influence of fine particles on human health is stated. Next, methods of air analysis and fine particle's measurement are presented. Legislation for emissions and immissions in the Czech Republic is summarized. Finally the selected types of impactors are introduced. The practical part consists of three chapters. First chapter contains the fundamental calculation procedure and its subsequent refinement. In the following part the comparison of the calculation procedure with the parameters of the commercial impactor is provided. Lastly, the design of the impactor is created for the specified parameters using the developed calculation procedure.
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