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Steam turbine - condensation formation and discharge
Zouhar, Adam ; Filip, Patrik (referee) ; Fiedler, Jan (advisor)
Master thesis is dealing with the issue of condensate creation and removal from the Nesher Ramle steam turbine during start-up and steady state. At the beginning a preliminary calculation of heat balance and the turbine itself is done. It is followed by description and design of drainage system supplemented by calculation of the steam flow through the orifices. Steam flow calculation was done via S. D. Morris, Pavelek with Kalčík and Ambrož, all three methods were compared. The main goal is the theoretical calculation of the amount of condensate created during start-up which is influenced by its initial state from which it is started. Three default states are considered, cold, warm and hot. In the last chapter the comparison of theoretical calculation with the measured data on real turbine is done and it is supported by the evaluation of the data from the measurement of the steam turbine at steady state on maximum power and half power. From the steady state analysis, percentage of water flow to expander from the total amount of condensate formed in the turbine were obtained.
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Steam Flow Measurement Error Analysis
Barabášová, Iveta ; Touš, Michal (referee) ; Bobák, Petr (advisor)
The thesis deals with analysis of measurement uncertainty. The theoretical knowledge presented in opening chapters is applied on indirect steam flow measurement by orifice plate. Calculation of steam flow is based on knowledge of pressure difference value, static pressure value and temperature. The data are acquired by experimental measurement in laboratory. The mass flow rate uncertainty is determined by normalized procedure (according to standard ČSN EN ISO 5167) and by detailed error analysis (according to standard ČSN ISO 5168) for comparison. Whole numerical computation employs python programming language in Spyder environment. Other computation result is steam consumption of washing cycle.
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Simulace proudění multiclonou pomocí Boltzmannovy kinetické rovnice
Molda, Vojtěch ; Hron, Jaroslav (advisor) ; Lipavský, Pavel (referee)
An attempt to numerically predict flow rate of experimental configuration of orifices in transition between molecular and viscous flow regime is described in detail. Discretization of Boltzmann kinetic equation known as lattice-Boltzmann method is derived and applied unfortunately with very little connection to the original experimental problem due to nearly supersonic nature of the experimental setup. Current quite unsatisfactory state of the art of compressible lattice-Boltzmann method is also presented.
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The membrane wall of the boiler with an advanced flow control
Češla, Martin ; Tomáš, Zdeněk (referee) ; Tomáš,, Zdeněk (referee) ; Ing.Tomáš Zdeněk (referee) ; Pospíšil, Jiří (advisor)
The master thesis deals with hydraulic characteristics of once-through boilers and describes the problems which may arise during the flow of water through the evaporator. Especially the formation of aperiodic instability of the evaporator and hydraulic uniformity amongst every steam generating tube. The thesis describes parameters, which cause these problems, and solutions how to deal with them. The calculation has been done for evaporator of the boiler called K2 located in power station in Chvaletice.
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Photographic documentation in the aquarium
KUTTELVAŠEROVÁ STUCHELOVÁ, Věra
The aim of this work was to gather relevant knowledge about methodology in aquarium photography, descriptions of different approaches to taking pictures of aquariums as a whole, fish tank interiors, aquatic plants, fish selected for display and other aquatic organisms including details. The main part of this work was to check particular methods and procedures, evaluation of the results and suggestion of efficient techniques for photography of aquatic organisms in artificial laboratory conditions. The digital photography was used exclusively with its advantages explained. The emphasis was on the lighting of objects and procedures used to eliminate the manifestation of optical flaws, which is the main issue in aquarium photography.
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High Pressure Actuator of Valves for the Steam Turbine
Gregor, Kamil ; Kolesa, Karel (referee) ; Škopán, Miroslav (advisor)
A high-pressure actuator of regulatory valves of steam turbines is designed in this thesis. The first part of the thesis discusses different types of steam turbines and the alternatives of their regulation. In the second part, one particular arrangment, with directional control valve, double poppet valve and hydraulic curtain, is described. Technical documentation including the conceptual proposal, the choice of individual components and all calculations is the output of this thesis. Drawing documentation of the set and drawing documentation required for the construction of the hydraulic block is attached.
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Realization of digital exposure meter
Vacula, Richard ; Michal, Vratislav (referee) ; Frýza, Tomáš (advisor)
Bachelor’s thesis deals with the history of light measurement, ways of measuring exposure and constructions of exposure meters. In the last chapters it is treated of the realization of digital exposure meter. This project also examines the characteristics of digital light sensor ISL29003 and its use for purposes of measuring exposure.
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Simulation of Lens Features
Kučiš, Michal ; Seeman, Michal (referee) ; Zemčík, Pavel (advisor)
Computer vision algorithms typically process real world image data acquired by cameras or video cameras. Such image data suffer from imperfections cause by the acquisition process. This paper focuses on simulation of the acquisition process on simulation of the acquisition process in order to enable rendering of images based on a 3D generated model. Imperfections, such as geometry distorion, chromatic aberration, depth of field effect, motion blur, vignetting and lens flare are considered.
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