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Fatigue properties of structural steel 11 523
Kudelka, Martin ; Kohout, Jan (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis studies the mechanical properties of steel 11 523 in the state after normalization annealing. Its purpose is an assessment of the structure in material and determination of static and fatigue characteristics. In the theoretical part of thesis, there is explained, how to divide and mark kinds of steel. There is also a mention about basic parameters of material and the main attention is paid to fatigue and its laws. The metallographic analysis, tensile test and the fatigue test were realized in the experimental part of thesis. Experimentally determined values were compared with data in the literature.
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History of hip joint replacements
Kohout, Jiří ; Urban, Filip (referee) ; Vrbka, Martin (advisor)
In this bachelor´s thesis is solved problem of friction, lubrication, wear and history of hip replacement. History is described from the second half of 18th century and there was an effort to include every important milestones that affected development of the alloplastic of hip joint. Beside this development is also observed volume wear of hip joint. History of lubrication and friction is watched from first experiment, which measured these factors it means mid-20th century.
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Heat Recovery Steam Generator with Two Pressure Levels
Smolinský, Petr ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
This master‘s thesis deals with the design of horizontal heat recovery steam generators (HRSG) with two pressure levels after a combustion turbine. In the introduction part is performed thermal calculation and proposal of a heat transfer surfaces. Furthermore, are suggested dimensions of the drums and pipes for flooding and transferring. The emphasis is placed on the fulfillment the required parameters of steam and flue gas at HRSG outlet. At the end is calculated loss of boiler draft and made technical documentation a drawing of the boiler.
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Steam boiler for waste burning 40t/h
Fejfuša, Martin ; Kohout, Přemysl (referee) ; Skála, Zdeněk (advisor)
This thesis deals with a project of steam boiler to combustion of refused-derived fuel. With respect of required fuel and output parameters of the steam was worked out stoichiometry, energy loss and boiler efficiency, heat flows was allocate to individual heat exchange surfaces. The heat exchange surfaces was calculate and project in detail.
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Grate Steam Boiler for Straw Combustion
Soľár, Slavomír ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
The main aim of this diploma thesis is to proceed a design of grate steam boiler for grain straw combustion with 15,6 MJ/kg of fuel efficiency. Steam power of boiler is 15 t/h, pressure of overheated steam is 5 MPa, temperature of overheated steam is 415 °C and temperature of inlet water is 125 °C. The estimation is based on proportioning of draughts and segments of boiler and on thermal computation. Verification of divergence of thermal balance is going to constate accuracy of boiler design.
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Grate Boiler for Wood Chips Combustion
Kozák, Tomáš ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
The thesis is dedicated to the design of the steam boiler which burns wood chips, with a natural circulation of the water. It is a grate boiler, which produces 20 t/h of the steam. The output parameters of the steam are 420 °C and 5 MPa. The feedwater temperature is 125 ° C .The thesis gradually deals with stoichiometric calculations and determines the efficiency of the boiler. Then it describes the design of the fireplace and thermal calculations of each heat transfer surfaces. The appendix includes drawings of the boiler.
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Grate Boiler for Wood Chips and Coal Combustion
Lauš, Ladislav ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
The work deals with the constructional and calculation design of the boiler for burning wood and combustion coal in scale (30/70-coal), in load 50 t/h, parameters of steam output p=7,5 MPa, t=480 °C and a temperature of feed water 105 °C. It is a boiler with natural water circulation by evaporation surfaces. In proposal first steichiometric calculations and enthalpic calculations of air and flue gas are performed. Then it is calculated heat balance, the boiler losses and the thermal efficiency is determined. After designing the combustion chamber and dimensions of pulls are determined. In last chapter the overall energy balance are checked. Drawing documentation of steam boiler is a part of the work.
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Porovnání velikosti plochy ustájení na zdravotní stav a masnou užitkovost prasat ve výkrmu
KOHOUT, Martin
The bachelor thesis is focused on the influence of health status and greasy performance in comparison with the maintenance area. First, I address all the effects on pig farming, in the next section we will get acquainted with the selected farm in which the experiment will take place. The experimental hall has better results in recent losses, conversion and average consumption per feeding day. The control hall achieved a better average increase. The conclusion of the work points to the result of an experiment with the proposed measures to improve the effectiveness of fat efficiency and health.
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