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Time changes of the photovoltaic cells properties
Kvapil, Jakub ; Vaněk, Jiří (referee) ; Novák, Vítězslav (advisor)
The thesis is about the problematics of perovskite, production of perovskite structure and measurment of photovoltaic cells. The introduction deals with material properties and sctructure of perovskite. There is explained a problem of perovskit photovoltaic cells and production of perovskite structure. Then the measurement methods are explained, which are used for evaluation of photovoltaic cells properties.
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Evaluation of machine efficiency for production task assurance
Harnová, Veronika ; Jelínek, Adam (referee) ; Jurová, Marie (advisor)
The diploma thesis concerns evaluation of machinery efficiency in selected production department. The theoretical part briefly describes production management and theoretical methods of OEE evaluation. The thesis also discusses selected IT systems utilised in engineering. The main body of the thesis analyses data acquired from those IT systems. The conclusion outlines proposals for improvement.
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Supercharging of internal combustion engines
Vrána, Jan ; Jedelský, Jan (referee) ; Štětina, Josef (advisor)
In supercharging are applied mainly two ways - turbocharging or charging using a mechanical compressor. The aim of thesis was to compare the ideal cycles of internal combustion engines with ideal cycle of supercharged engine, write down the main problems of supercharging, especially the border of self-ignition of fuel and detonation ignition, advantages and disadvantages of different methods of supercharging and its effect on engine efficiency. Further, there are given basic construction designs of turbochargers and air coolers and some special methods of supercharging and cooling.
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Information System Assessment and Proposal for ICT Modification
Lavický, Jindřich ; Ing.Pavel Škorpík (referee) ; Koch, Miloš (advisor)
This master´s thesis contains an explanation of basic terms and principals used in an issue of information systems. Part of this master´s thesis is analyses of a current state of an information system in a selected company and evaluation of its effectiveness. A set of improvement propositions of the current state was created based on those analyses with both balance and effectiveness of an IS taken into account.
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Effect of exhaust pressure loss on efficiency of gas microturbine
Čechman, Ondřej ; Havlásek, Martin (referee) ; Máša, Vítězslav (advisor)
The aim of this bachelor thesis is to support of microturbines application in industrial processes where it is not used yet, but where it would bring economical saving. This is especially in the case of CHP. For specific CHP system is need to design heat exchanger according to the specific application. One of the necessary parameters for heat exchanger design is exhaust pressure loss caused by heat exchanger, which has negative effect on electrical efficiency of microturbine. The concrete aim of this thesis is verify effect exhaust pressure loss on electrical efficiency of gas microturbine. This issue is solved theoretically using values declared by manufacturer of microturbines, which has been later verified by experimental measurements. The results of this thesis will help to integrate specific microturbine (Capstone C30) as CHP unit for model of energy intensive consumer in the Laboratory of Energy Intensive Processes of NETME Centre at the Faculty of Mechanical Engineering at the Brno University of Technology.
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Optimization of cooperation power station blocks
Smarž, Patrik ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
The introduction of this bachelor´s thesis deals with basic terminology used in the power plants. It details the terms: work, power, and efficiency. The other part deals with basic thermal circulation of a condensation power plant and possibilities to increase the thermal circulation efficiency. It describes improvement of admission steam parameters, especially dealing with a steam superheater. Regeneration heating, steam heating and pressure decrease in the condenser are explained as other options of the thermal circulation efficiency improvement. Furthermore, it deals with consumption and cost characteristics of a power generating facility and optimisation of operation of power plants and heating plants in the EC. The model showes an explanation of an optimal distribution of power outputs of two cooperating power units at a given load.
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Improvement Power Parameter of Small Induction Motors
Halfar, Tomáš ; Ondrůšek, Čestmír (referee) ; Hájek, Vítězslav (advisor)
The master’s thesis Improvement power parameter of small induction motors deals with issues of lowering the losses of small induction motors. The first part introduces with design and principles of operation of induction motors. Also introduces to theoretical problematic of losses, their lowering and measuring. In the practical part there are results of the measuring the losses in the induction motor ATAS Elektromotory Náchod a.s. T22VT512 (71-0512). There are proposed methods of increasing the efficiency of induction motor due to measuring and their verification in the Maxwell software. The last part is dedicated to measuring the losses of prototype motor from ATAS and comparison of results with previous motor.
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