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Anyalyze of photovoltaic cell by noise diagnostic
Husák, Marek ; Sládek, Petr (referee) ; Vaněk, Jiří (advisor)
The master’s thesis deals with the noise diagnostic in the solar cells. Describes the main kinds of noises. The samples were quality and reliability screened using noise reliability indicators. The samples were surveyed by measuring the I-V characteristics, the noise spectral density as a function of forward voltage and frequency. It was calculated the noise spectral density as a function of forward current.
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Design of a laboratory equipment focused on measuring a PV panel at different temperatures
Moravčík, Daniel ; Báňa, Jiří (referee) ; Šedina, Martin (advisor)
The bachelor's thesis deals with the temperature dependence of the performance of a photovoltaic cell and the method of regulating its temperature. He also deals with the design and implementation of a laboratory element used to regulate the temperature of the photovoltaic cell in the laboratory. The theoretical part discusses the principle of photovoltaic cells and their electrical parameters, as some of them are the subject of measurement for which the device is made. The theoretical part then deals mainly with the influence of the surrounding environment on the performance of cells and their cooling methods in practice. The practical part itself describes the design and manufacture of a laboratory element for temperature regulation used to adjust the temperature of a photovoltaic cell, focusing first on the electrical design and then on the structural design. Finally, the work is devoted to the verification of the function of the manufactured device, when the accuracy of the device is determined.
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Semiconductor microstructures for cellular photostimulation
Tvrdoňová, Anna ; Weiter, Martin (referee) ; Glowacki, Eric Daniel (advisor)
Peroxid vodíku (H2O2) je metastabilní reaktivní forma kyslíku, která reguluje mnoho biologických drah. Úloha H2O2 v biologických procesech závisí na jeho lokální koncentraci, v malém množství (nM) může působit jako signální molekula, zatímco vyšší koncentrace mohou mít cytotoxické účinky. Cílem této práce bylo vytvoření fotosenzitivních mikročástic, které by produkovaly fyziologické množství peroxidu vodíku pro regulaci signálních drah v kultivovaných buňkách. Navrhované mikročástice jsou organické fotovoltaické struktury bez substrátu, které produkují H2O2 fotofaradickou redukcí molekulárního kyslíku. Produkce peroxidu probíhá za současné oxidace donoru elektronů přítomného v elektrolytu. Částice mají rozměry v řádu mikrometrů, zatímco jejich tloušťka nepřekračuje 100 nm. Fotofaradické reakce jsou poháněny červeným světlem (660 nm), které může pronikat tkáněmi, což umožňuje potenciální aplikace mikročástic in vivo. Práce se bude zabývat optimalizací výroby mikročástic a charakterizací produkce H2O2.
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Design of a photovoltaic power system with battery storage for household purposes in area of Brno-mesto
Vrana, Martin ; Vanýsek, Petr (referee) ; Vaněk, Jiří (advisor)
Táto bakalárska práca sa zameriava na rešerš technológií obsiahnutých v návrhu fotovoltického systému, ako sú solárne panely, nabíjateľné akumulátory, a systémy na premenu elektrickej energie. Následne sú tieto informácie využité na návrh hybridného a sieťového fotovoltického systému pre rodinný dom nachádzajúci sa v lokalite Brno-Mesto. Plán realizácie je nájsť cenovo výhodné riešenie s rozumným časom návratnosti, ktoré prevažne pokryje energetický odber domácnosti. Takisto sú náklady každého zo systémov znížene o dostupné štátne dotácie podľa parametrov každej inštalácie. Sieťový systém je lacnejší ako hybridný systém, pretože systém neobsahuje drahé batérie. Preto má nižšiu dobu návratnosti šiestich rokov, v porovnaní so siedmimi rokmi v prípade hybridného systému. Hybridný systém je výhodný, pretože umožňuje lokálne ukladanie energie a poskytuje záložné napájanie v prípade výpadku prúdu. Dodávateľ elektriny umožňuje uložiť prebytočnú energiu vyrobenú systémami do virtuálnej batérie, z ktorej je možné počas roka čerpať v čase nedostatočnej výroby energie. V kombinácii so súčasnými vysokými cenami energie majú oba systémy relatívne krátke obdobie finančného bodu zvratu v porovnaní so systémami v minulosti. Finálny výber typu inštalovaného systému je na klientovi.
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Design of a photovoltaic power plant with battery storage for a family house
Hub, Michal ; Maule, Petr (referee) ; Vaněk, Jiří (advisor)
This diploma thesis deals with the design of a photovoltaic power plant with a battery storage for a family house. In the theoretical part at first the principle of photovoltaic cells is analysed together with the various types used in this branch. Furthermore, the thesis deals with the description of photovoltaic systems and its individual parts consisting of inverters and accumulators. This thesis analyses the object for the installation of a photovoltaic power plant, including legislative and subsidy conditions. In the final part, itself system is analysed with a price proposal.
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Design of a photovoltaic power plant with battery storage for a family house
Řihák, Roman ; Maule, Petr (referee) ; Vaněk, Jiří (advisor)
This bachelor work deals with the design of a photovoltaic power plant with a battery storage for household purposes. In the theoretical part are mentioned principles and explanation of the function of photovoltaic cells and accumulators. The thesis also deals with the description of photovoltaic systems and the system of accumulation of energy in accumulators. In the final part are the system and legislative conditions analyzed. In the practical part of the work is shown photovoltaic power plant design with PV*SOL software.
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Design of a photovoltaic power plant with battery storage for a family house
Pavlíček, Michal ; Maule, Petr (referee) ; Vaněk, Jiří (advisor)
This bachelor thesis deals with the design of a photovoltaic power plant with a battery storage for household purposes. In the theoretical part are mentioned principles and explanation of the function of photovoltaic cells and accumulators. The thesis also deals with the description of photovoltaic systems and the system of accumulation of energy in accumulators. In the final part are the system and legislative conditions analyzed. In the practical part, the photovoltaic power plant with battery storage for the home and its economic evaluation is proposed.
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Diagnostic of semiconductor materials by EBIC method
Davidová, Lenka ; Máca, Josef (referee) ; Čudek, Pavel (advisor)
Master´s thesis is focused on diagnostics of semiconductor materials by EBIC method (measuring of currents induced beam), determination of the lifetime of minority carriers, or their diffusion length. The theoretical part is aimed at the principle of scanning electron microscopy, the characteristic properties of the microscope and the signals generated by the interaction of the primary electron beam with the sample. The thesis describes a structure of semiconducting silicon, band models, types of lattice defects and doped of semiconductor structures. After that it is described the theory of calculation of the diffusion length of minority carriers in semiconductors of type N and P. The aim of the experiment part of the thesis is to measure the properties of the semiconductor structure by EBIC and determination of diffusion length and lifetime of minority charge carriers based on the measured data The aim of the experiment part of the thesis is to measure the properties of the semiconductor structure by EBIC and determination of diffusion length and lifetime of minority charge carriers on the basis of the measured data.
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