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Hybrid Drives in the Tractor Construction
Líčeník, Adam ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This bachelor’s thesis utilizes survey of types hybrid propulsion systems in the tractor construction. It evaluates its operational advantages and disadvantages and presents examples of some tractors and its elements. The thesis focuses on components which are used in hybrid propulsion systems. In the conclusion there is a review of individual variations in terms of emission and economy of operation.
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Supercapacitor cycling device
Hába, Roman ; Kunovjánek, Miroslav (referee) ; Dvořák, Petr (advisor)
The supercapacitor is a perspective electrical component reaching very large capacity. Currently is beeing worked on improving its parameters. These parameters are needed to test. Charging and discharging of the supercapacitor is theoretically fully reversible process. However, real supercapacitor accompanies ageing of the electrolyte and electrodes, lead to reduction of the capacity. The aim of this work is to design a device that expose supercapacitor to accelerated ageing, which will facilitate the assessment of ageing commercial and laboratory made supercapacitors.
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Charge Transport and Storage in a Supercapacitor Structure
Kuparowitz, Tomáš ; Zedníček, Tomáš (referee) ; Hájek, Karel (referee) ; Sedlák, Petr (advisor)
Práce se zabývá studiem superkondenzátorů (SC). Výstupem je detailní studie principů přenosu náboje ve struktuře SC, ukládání energie a nový náhradní model SC, který je založen na fyzikálních zákonitostech a principech SC. Dále byl vytvořen matematický model SC, který popisuje chování náboje v jeho aktivní vrstvě. SC byly testovány metodami umělého stárnutí. Závislosti poklesu parametrů SC vlivem různých metodik stárnutí jsou v práci shrnuty.
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Supercapacitors energy storage
Kovařík, Jakub ; Pavlík, Michal (referee) ; Boušek, Jaroslav (advisor)
This paper describes the design of DC/DC converters designed for charging supercapacitors and subsequent transformation of voltage to the desired value. In the text are presented decreasing and increasing switched-mode voltage converter including the calculation of the individual components and also the design of converter that combines both types. Using simulation software has been verified the function of each circuits, which can serves as a lower power backup supply.
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Use of the Energy Harvesting Method
Dobrovolná, Terezie ; Králík, Martin (referee) ; Sekora, Jiří (advisor)
The bachelor thesis deals with the use of Energy Harvesting. It contains suggestions for obtaining electric power from alternative sources located inside the laminar box such as light, heat or vibration. Electricity is also used to power sensors and measure solid particles in the air. If a certain particle concentration is exceeded, the acoustic sensor alerts. The work also focuses on the compilation of a block diagram of the device, experimental construction and verification of the functionality of the entire system.
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Nonconventional Utilisation of Wind Energy
Zajíc, Josef ; Turek, Vojtěch (referee) ; Jícha, Jaroslav (advisor)
The thesis considers utilization of the wind energy as source of energy for the production of hydrogen. In the first part, there is described the types of wind engine specialized especially on screw wind engines and their construction. After that follows the description of dilemmas usage of electric energy addicted in time and with it connected problems with accumulation elektricity by the help of various methods. The final part of the thesis is than addicted to statistic evaluation of wind conditions, description and suggestion of the equipment hydrogen management.
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Aprotic electrolytes for supercapacitors
Musílek, Václav ; Knotek, Tomáš (referee) ; Dvořák, Petr (advisor)
This master´s thesis deals different types of the aprotic electrolytes for supercapacitors and investigates by impedance spectroscopy to conductivity and method cyclic voltametry to measure dimension potential windows. Used aprotic solvents: propylencarbonate, dimethylsulfoxide, N, N dimethylformamide, ethylencarbonate, dimethylcarbonate, diethylcarbonate and acetonitrile. In the aprotic solvents were appended salts: LiClO4, NaClO4, KClO4, LiBF4, LiPF6, TEABF4 and TMABF4. From these compounds were prepared solutions with the different molar concentrations.
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Technologies for storing electrical energy in electric vehicles
Zdražil, Marek ; Walek, Agata (referee) ; Langerová, Petra (advisor)
Tato bakalářská práce je zaměřena na technologie pro ukládání elektrické energie, s důrazem na jejich použití v elektrických vozidlech. První kapitola se zabývá historickým vývojem technologií pro ukládání elektrické energie a jejich použitím v prvních elektrických vozidlech. Dále popisuje elektrická vozidla, která byla sporadicky vyráběna v průběhu dvacátého století, až po devadesátá léta, kdy tato technologie opět nabyla na atraktivitě. V další části nalezneme rozdělení současných elektromobilů a zástupce těchto kategorií mezi automobily vyráběnými v současnosti. Třetí část se věnuje technologiím používaným v současnosti, či nedávné minulosti. Následně je uveden přehled technologií, které by mohly do budoucna nahradit současné systémy, nebo dokonce konvenční spalovací motory.
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Supercapacitor cycling device
Hába, Roman ; Háze, Jiří (referee) ; Dvořák, Petr (advisor)
The supercapacitor is a perspective electrical component reaching very large capacity. Currently is beeing worked on improving its parameters. These parameters are needed to test. Charging and discharging of the supercapacitor is theoretically fully reversible process. However, real supercapacitor accompanies ageing of the electrolyte and electrodes, lead to reduction of the capacity. The aim of this work is to design a device that expose supercapacitor to accelerated ageing, which will facilitate the assessment of ageing commercial and laboratory made supercapacitors.
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