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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Možnosti likvidace a recyklace fotovoltaických panelů v ČR / Aspects of the disposal and recykling of photovoltaic panels in CR

Papírek, Jan January 2020 (has links)
This diploma thesis is focused on the assessment of the possibilities of disposal of photovoltaic panels installed in the Czech Republic. In addition to the basic theory of photovoltaic cells and panels, the theoretical parts describe legislation, subsidies in the field of photovoltaics and the development of photovoltaics in the Czech Republic. As part of recycling, their methods, work with the collective system, as well as the impact on the environment are analyzed. In the experimental part, using the data of the installed capacity and the average weights of the panels, various projections of the disposal of the panels over time are made, which take into account factors such as the life of the power plant or the capacity of the recycling line. Furthermore, according to the available literature, an analysis of the revenue from the sale of recycled materials contained in panels installed in our territory is performed. Subsequently, the needs of future implementers of proven estimates of labor and logical demands were assessed. Finally, an economic evaluation of the fundamental aspects of the FRELP recycling process was performed and the net prices of different recycling directions were determined.
152

Analýza kompozitního sendvičového panelu za podmínek simulujících umístění na raketovém nosiči / Analysis of composite sandwich panel under conditions simulating placement on a rocket carrier

Král, Martin January 2020 (has links)
This work deals with composite sandwich panels, which are currently used as supporting structures for satellites. This type of panel contains an aluminum honeycomb core and two thin laminate coatings, reinforced with carbon fibers. Laminate sandwich panel coatings offer an alternative to conventional aluminum coatings, which is advantageous mainly due to the reduction of weight and increase of the flexural stiffness of the panels. The work is a parametric study of mechanical properties for several variants of the coating of sandwich panels. These are laminate coatings, differing in the orientation of the fibers in the individual layers, as well as an aluminum alloy coating. The study is divided into two parts. The first part examines the deformation-stress response of a sandwich panel, which is simply supported at the edges and loaded with pressure. The response calculation is performed using FEM and verified by the method of sum of an infinite series. The second part investigates the deformation-stress response of the joint, (node) of two sandwich panels, which is loaded by random vibrations, aimed at simulating the mechanical environment of the rocket carrier during the takeoff of the launch vehicle. The response is calculated using FEM and verified by an experiment on a vibrating stool for a selected variant of the laminate coating of sandwich panels. The results of the work can be used for the design of baffle of the X-ray imaging device (SXI), which is part of the equipment of the space satellite of the SMILE project.
153

Maticový display s flip-dot maticí / Flip-dot matrix display

Petřek, Miroslav January 2021 (has links)
This thesis deals with the design and implementation of a control system that complements the existing BS110 flip-dot display panel and enables Ethernet and wireless communication. It first briefly discusses the original use of the display, and gives an overview of the display types. This is followed by an analysis, testing and repair of the BS110 panel, followed by a description of the proposed concept and the development of the control computers and their circuitry. For these, the thesis further describes the design and implementation of the software consisting of a website, database, MCU control script and display circuit control program. Finally, the system so designed and built is demonstrated and evaluated.
154

Návrh soupravy pro vytvoření zásobovacího místa elektrickou energií vytvořenou z obnovitelných zdrojů / Design of a kit for the creation of a supply point for electricity generated from renewable sources

Fridrich, Jiří January 2021 (has links)
This project deals with the design and realisation of a set that will work as a power supply point with electricity generated from renewable energy sources. The theoretical part deals with information about renewable energy sources and energy storage options. In the practical part, a mobile kit for powering variable message traffic signs is designed. It uses photovoltaic panels and stores energy in a lead-acid battery. A methanol fuel cell is used for backup power. The device is adapted for use in road traffic and meets the requirements of the relevant authorities. To verify the stability of the structure, there were performed static calculations, which proved the ability of the device to withstand wind stress. Part of the work was to draw a complete production documentation, which was used to create a test sample. Long-term measurements of energy flows in the system were performed on that sample. These measurements confirmed the ability of the device to operate autonomously and the possibility of using it for the required purpose.
155

Mobilní autonomní fotovoltaický systém / Grit-off photovoltaic system

Horváth, Martin January 2010 (has links)
The restoring sources of energy and their development brings the question how these sources can be utilized in the best way. Master`s thesis deals with photovoltaic systems. It describes their history line, actual situation and also brings some expectations in the future. There are mentioned some materials and technologies which are used for its manufacture, conditions of using in practice, advantages and disadvantages and finally a real mobile application of photovoltaic which serves for a production of electricity that is saved in the battery.
156

Vliv stínění na I-U charakteristiky fotovoltaických modulů / Influence of shading on I-V characteristics of photovoltaic modules

Hájek, Tomáš January 2010 (has links)
The presented thesis is concerned with the principles of Photovoltaics. It describes the basic principles of photovoltaic panels functioning and the unique periods of their developement. The thesis is also focused on the theoretical knowledge of equivalent circuits of photovoltaic panels. The primary objective of the thesis is a project of simulation environment in the programme Agilent VEE Pro 8.0. The programme enables a simulation of I-U characteristics of real photovoltaic panels.
157

Simulace I-U charakteristik fotovoltaických modulů / Simulation of I-V characteristic on photovoltaic modules

Jiřík, Jan January 2010 (has links)
Tato práce se zabývá slunečním zářením, které je jedním z možných zdrojů obnovitelné energie. Hlavnímy body práce je seznámit se s problematikou fotovoltaiky. Sestrojení poloautomatizovaného měřícího pracoviště díky němuž obdržíme reálné I-U a P-U charakteristiky solárního panelu. Dalším bodem je sestrojení programu v programu Vee Pro 8.0, který tyto charakteristiky simuluje v programu. Cílem je zjistit charakteristické konstanty pro daný solární panel.
158

Optimalizace difraktivních struktur pro koncentrátorový fotovoltaický panel / Optimization of diffractive structures

Chalupa, Petr January 2011 (has links)
This work is focused on the possibility of sunlight concentration on silicon dies or silicon stripes. The main aim of this work is the design and realization of the concentration element, or system, which is based on diffractive optics and optimized to achieve possibly high optical efficiency. The theoretical part deals with problems of photovoltaic systems and sunlight concentration. The practical part deals with design of optical microstructures and their realization by e-beam lithography using the electron-beam writer BS600. Microstructures created in the electron resist on silicon substrates or embossed into transparent materials are measured in the laboratory. We evaluated and compared their optical properties, which gives some feedback for further optimizations. Transparent elements are tested with real silicon dies and so overall properties of a prototyped photovoltaic module can be evaluated.
159

Využití řídicího systému Foxtrot jako Building Management System / The use of the control system Foxtrot as Building Management System

Hubálek, Michal January 2013 (has links)
This diploma thesis describes an intelligent wiring system especially of one’s home. Modern Foxtrot System from TECO, JSC has been examined and done to work. In the first part of the thesis the highly diverse options of the intelligent home system are dealt with. The second part of the thesis treats the concept of Foxtrot System in greater detail. The objective is to describe the use of the control system as well as the advanced automation. The larger part of the diploma thesis deals with a sample laboratory Foxtrot system panel, its draft, functions and construction. The budget for the draft and the construction is created and based on the prices of Foxtrot System components. As for the planned integration of the laboratory panel in education, two laboratory manuals are developed and vary in their control functions. In the first manual Foxtrot System, Mosaic software and push button control panel are introduced to the user. The second one describes how to create a more complicated program that is used to control the system via the web interface computer or Smart phone and are also used buttons.
160

Servomechanické řízení pohybu fotovoltaických panelů / Servomechanical movement control of photovoltaic panel

Uher, Ondřej January 2011 (has links)
Thesis deals with the introduction to the production of electricity using photovoltaic panels and the relative position between panels and the Sun. The project aim was to design equipment to ensure the vertical position of the solar panels towards the Sun during the day so as to achieve maximum energy gain from sunlight. Pointing mechanism will be governed by the date and time.

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