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The influence of environmental conditions of the recycling of solar modules
Langer, Filip ; Vaněk, Jiří (referee) ; Jandová, Kristýna (advisor)
This thesis is focused on experiments, goal of which is to separate protective glass apart from thin layer solar panel. This could lead to less expensive and more efficient recycling. We try to achieve the separation of the glass by thawing ethylene vinyl acetate layer, which serves as insulant and bonding material. Experiments are concluded in high temperature dryer and high temperature vacuum oven on samples of thin layer solar panel, which is for the purposes of experiments cut into same pieces by water jet cutting machine. The initiatory experiments in dryer and oven are to determine value of ethylene vinyl acetate thaw point in tested samples of panel. The thaw point is determined to be 340 °C. When exposed to this temperature, the ethylene vinyl acetate thaws enough for glass to be able to be extracted with minimal physical strength. The process is accompanied by fire destruction of tedlar layer and creation of exhaust gases. Following experiments in vacuum and nitrogen environment are to test their influence on thawing process. Exposing sample to temperature of 340 °C in vacuum led to no new results. Exposing sample to temperature of 340 °C in nitrogen environment prevented fire and achieved same level of thawing of ethylene vinyl acetate while creating less exhaust gases. Even though the fire was prevented, tedlar layer was still destroyed by the high temperature. Furthermore, particles of evaporated ethylene vinyl acetate condensed on surface of module in form of dust. Following experiments studied absorption of panel and influence of accessible solvents on thawing process. It was determined that panel is able to absorb approximately 2 % of acetone, 0,4 % of isopropyl alcohol and 0,11 % of distilled water in its own weight. Experiments with modules soaked in these solvents proved no new results in thawing process. By observing samples of ethylene vinyl acetate taken from module, thawed out of module after experiment in vacuum oven and dust condensed on surface of module after experiment in nitrogen environment, it was proven that the condensed dust is indeed ethylene vinyl acetate.
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Unconventional methods of processing materials for knives
Bražina, Jakub ; Němec, Karel (referee) ; Doležal, Pavel (advisor)
This thesis focuses on the issue of unconvetional cutlery materials, their application for production, and the processing of a hunting knife. The readers are aquainted with cutlery issues in the search section, where the basic characteristics and properities are written. The next part describes the various metallic and non-metallic materials and their possible properities of processing and production. This thesis also deals with the surface protection of these cutlery materials. The second main part describes construction design, material selection, heat treatment, and with surface treatment of the hunting knife.
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Manufacture of centrifugal castings from iron and non-ferrous alloys
Virgl, Vítězslav ; Kaňa, Václav (referee) ; Cupák, Petr (advisor)
The goal is to give a comprehensive explanation of centrifugal casting technology. It describes the process and its parameters, the forces acting on the molten metal, the basic principles and methods. There are also mentioned the types of forms used. Emphasis is placed on the cast materials. Furthermore, there are covered all benefits and drawbacks of centrifugal method and shown some larger Czech foundries with their current production capabilities.
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Plastic optical fibres and their application in practice
Bubela, Ondřej ; Tejkal, Vladimír (referee) ; Šporik, Jan (advisor)
The intention of this essay is familiarize readers with polymer optical fibers knowed as POF. Listing the losses factors (attenuation, dispersion) and transmition properties (bandwidth, index profiles). Describes production POF (suitable materials and methods), connecting with detachable and not detachable joints. Discuss and compares diference between GOF and POF. By measuring demostrates the complexity of compilation POF and GOF physical layers. Define the facts affecting transmission parameters. Trying to inform about economical possibilities.
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Development of DC arc quenching chamber
Černohorský, Petr ; Valenta, Jiří (referee) ; Šimek, David (advisor)
Seminar thesis focuses on the issues about quenching the electric direct arc by the quanching system. Teoretical part deals with action about quanching the direct arc and with another actions which happens in direc discharge. There is described proposal and construction of the insulating quenching system. Than chamber was testing in high voltage laboratory and the results from testing was evaluated.
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Piston Rings of Modern Petrol Engines
Cupák, Václav ; Maršálek, Ondřej (referee) ; Raffai, Peter (advisor)
This bachelor thesis deals with issues of piston rings used in modern petrol engines. The first part is focused on describing of functions and requirements with which piston rings must deal with. Next part is aimed on shapes of piston rings. Materials from which are piston rings made of are part of third chapter. For proper function, it is important to make some surface treatment. The last chapter contains surface treatment of piston rings.
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Construction Technology study of building a house of the eko panels
Habarta, Tomáš ; Kopecký, Lukáš (referee) ; Diaz, Yvetta (advisor)
The object of the bachelor thesis is the description of the construction and technological study of building a family house from Ekopanel. It is an ecological diffusion free material in the form of panels, which are pressed at high temperature and pressure. Part of this technology study is time and financial plan of construction, basic concept of building operation, bill of quantities specified objects, technological regulation for the implementation anhydrite monolithic floors, precautionary measures of the construction site, listing of machinery and tools which are used, inspection and test plan and comparison of wooden buildings with brick building.
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Possible Materials for Crash-Test Dummy Construction
Pokorná, Veronika ; Coufal, Tomáš (referee) ; Bilík, Martin (advisor)
This diploma thesis is devoted to the possibility of using materials for crash test dummy construction. The thesis describes how crash test dummies evolved, what crash test dummies are currently available for crash test and what they are made of. The main aim of the diploma thesis is to design materials and process for production of a crash test dummy with human-like biofidelity. The thesis describes the way which the dummy will be manufactured using duralumin, rubber, alder wood and silicone polymer or agar.
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Graphics Scene Visualization Using OGRE Library
Ondrejíček, Marián ; Navrátil, Jan (referee) ; Pečiva, Jan (advisor)
The goal of this thesis is to investigate the possibilities of the OGRE visualization library and to implement an application which utilizes both simple and advanced OGRE features. Furhtermore there are explained basics of creating effects using Cg language and connecting them with OGRE library. The Bullet library which is often used in visualization applications for physics calculations is analyzed as well. The second part describes implementation of the demo application. In the end, the results are discussed, including possibilities of future development.
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Piston Rings of Modern Diesel Engines
Homola, Petr ; Knotek, Jiří (referee) ; Raffai, Peter (advisor)
This bachelor thesis concentrates on piston rings and is divided into several points. First point deals with the functions of piston rings and with the demands for them, in the second point there is a division according to the type of the ring and constructing solution. Another chapter deals with materials that are used the most when fabricating piston rings and the last chapter deals with the surfacing that is used the most.
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