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Using thermoelectric generator to increase the efficiency of the radiator
Kříž, Pavel ; Janák, Luděk (referee) ; Vlach, Radek (advisor)
This diploma thesis deals with a design layout of the fan power supply that ensures the increase of the efficiency of the heating unit. For usage in the areas without electric power, the power supply is secured by thermoelectric generator. The system has to function on the basis of autonomous system which turns itself on only when necessary. In the introductory part of the paper there is a recherché of thermoelectric generators for general usage. Next it mentions the basic findings in from the field of DC/DC converters for low power applications. In this part attention is given to MPPT algorithm. Furthermore basic knowledge from the field of heat transmission together with its most used elements is described. Subsequently existing applications that increase the effectiveness of heating are mentioned. Their disadvantage however is that they depend on the external source of power supply. The practical part to a large extent covers the analysis of the suitability of the chosen thermoelectric module. For securing of the heat gradient of the generator there was a model created meeting the figures in the manual and there are several simulations in the MATLAB program. Furthermore several measurements of the thermoelectric module took place in order to secure realistic figures. Subsequently a DC/DC converter was chosen. Finally the testing was made on the real composition. In conclusion there is an overall evaluation including the real usage and the economical aspect of the project. The outcomes of the work enable to avoid common mistakes that are part of many specialized articles. The created system is to be used after the adjustment of the cooling to the required aim. At the same time it becomes very effective.
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System of DC/DC converters for solar cells of a fotovoltaic power plant
Benda, Dušan ; Huták, Petr (referee) ; Vorel, Pavel (advisor)
This master thesis describes the design of a DC/DC converter for one photovoltaic panel with a 250 W peak power. The master thesis is divided into parts dealing with detailed design of power electronics, analog circuit design, description of control MPPT algorithms and software for control circuit. The chapter with the mathematical modeling of the converter created in the Matlab Simulink was added beyond the assignment.
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Model of photovoltaic power plant
Janic, Lukáš ; Buchta, Luděk (referee) ; Veselý, Libor (advisor)
Semestral thesis about modeling of photovoltaic power plant in Matlab. In the first part of the thesis deals with the processing history of solar energy, operating principle and construction of the photovoltaic cell and a voltage converters. The second part deals with the design of solar power plant in Matlab-Simulink. In the last section are shown simulated models and their simulated characteristics.
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The open mobile phone platform
Malinčík, Ondrej ; Šteffan, Pavel (referee) ; Macháň, Ladislav (advisor)
The aim of this work is construction of mobile phone which can be build using com- ponents that are widely available. The concept allows control of mobile communication in GSM network on AT commands level. Energy saving is emphasised and alternative power source using solar cell is examined. Manufacturing data and docummentation is available for user.
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MEMS Thermoelectric Generator for Aerospace Applications
Janák, Luděk ; Opluštil, Vladimír (referee) ; Hadaš, Zdeněk (advisor)
Tato diplomová práce se zabývá vývojem autonomního zdroje elektrické energie založeného na MEMS termoelektrickém generátoru. Uvažovaný generátor bude následně použit pro napájení autonomní senzorické jednotky pro letecké aplikace. Systémový pohled na autonomní senzorickou jednotku zahrnuje senzor se zpracováním a přenosem dat, energy harvester (termoelektrický generátor), power management, akumulační prvek a autodiagnostiku. Všechny výše uvedené komponenty jsou v práci podrobně popsány. V úvodu práce je provedena široká rešerše existujících termoelektrických generátorů pro letecké aplikace. Následně jsou popsány základní teoretické poznatky z oblasti DC/DC měničů pro energy harvesting. Zvláštní pozornost je věnována metodám MPPT (Maximum Power Point Tracking). Jako základ pro vývoj napájení autonomní senzorické jednotky bylo provedeno množství simulací za pomoci nástroje MATLAB/Simulink Simscape. Pro identifikaci prametrů modelu posloužilo měření na speciálním přípravku. Praktická implementace teoreticky popsaných problémů je provedena na k tomuto účelu navrženém technologickém demonstrátoru. Závěrem je zhodnocena reálná využitelnost navržené technologie pro finální aplikaci v leteckém průmyslu.
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Solar charger
Šálek, Karel ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
The thesis deals with the design of a solar charger with the possibility of energy backup. First, the basic principles of operation of photovoltaic panels, batteries and DC-DC converters are described. Subsequently, the topology of the charger and the analysis of the individual blocks is proposed. In the last part, the implementation and measurement of the basic parameters of the device is carried out.
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Design of a kit for the creation of a supply point for electricity generated from renewable sources
Fridrich, Jiří ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
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.
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The Development Of The Model Of PV System For Electric Water Heating
Sochor, Tomas
Generally, this paper informs about a concepts of the system for electric water heating which contains photovoltaic (PV) panels. Furthermore, the paper describes chosen concept in detail and it shows proposed model in software PSCAD. Finally, it brings and discusses first acheived results of the simulation of PV subsystem for different operational conditions.
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Voltage converter with MPPT algorithm for solar cell
Špina, Martin ; Pazdera, Ivo (referee) ; Huták, Petr (advisor)
This thesis deals with design of solar lithium ion battery charger using microcontroller controlled step down DC/DC converter. Control algorithm is designed to utilize most the of the energy coming from the solar photovoltaic panel, by using maximum power point tracking technology. This makes it as efficient as possible at any irradiation intensity level or temperature.
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MPPT regulator of photovoltaic power plant with smart battery management
Uhlíř, Marcel ; Boušek, Jaroslav (referee) ; Háze, Jiří (advisor)
The thesis deals with design of photovoltaic controller using MPPT technology based on Perturb & Observe algorithm extended by fuzzy logic processing. The converted energy is stored in a battery system with an optional voltage 12 V or 24 V. The battery system is provided by intelligent battery management, which allows to use a voltage balancer and desulphation. The whole system can be powered by external power supply, which is used to charge the batteries if there is the absence of photovoltaic energy. The device contains 12 V and 5 V outputs for connecting external devices. Through USB and Ethernet interfaces, it communicates with utility software that allows user to configure controller parameters and display battery system values. The purpose of this work is directed to the field of portable island systems for use in residential vans or caravans.
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