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Accumulation of energy from renewable sources
Charvátová, Marie ; Bajko, Jaroslav (referee) ; Fišer, Jan (advisor)
This bachelor’s thesis deals with the issue of accumulation of energy from renewable sources with a closer focus on electricity storage in the "small/home" scale. Delivering energy from renewable sources is highly variable and, in order to cover the time shift between production and consumption, energy must be stored. In the paper are described individual types of energy used in residential housing, sources of renewable energy are presented and various ways of energy accumulation are analyzed. The greatest attention is paid to chemical accumulators, because they are the most suitable solution for home use due to their practicality. At the end of the thesis, operational data from a small demonstration photovoltaic power plant with accumulation of electric energy in chemical accumulators are processed and evaluated.
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Design and Implementation of Modular Bioreactor with Use of Wasted Heat
Peterka, Michal ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
The aim of the thesis is to extend the existing project of further use of waste heat from biodegradation processes and to improve bioreactor design. The first part summarizes the theoretical knowledge of the use of biomass and waste resources. The practical part is initially focused on the development of the bioreactor structure, the following part deals with the use of heat pipes for heat dissipation and the last chapter is about heating the fermenter and collecting the generated gas. Designed construction of the new bioreactor proved to have more advantages than the previous type. Heat pipes have a great potential for heat dissipation from the bioreactor, next steps should lead to a system of interconnected heatpipes and controlled heat dissipation. Biogas consumption initially seemed like a good idea, but the processes within the fermenter are more complex than expected. After a short time, the processes inside the fermenter have stopped, therefore this path of research will require further exploration.
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Compost heating system for the hot water preparation
Dokoupilová, Bára ; Baxant, Petr (referee) ; Bajko, Jaroslav (advisor)
Using energy that is generated during decomposition processes in organic matter, is the fundamental theme of this thesis. While the following research succeeds to present the possibility of heat recovery using a compost heater, it also introduces composting in the context of ecology and global warming. The work analyses biochemical processes taking place in the decomposition of biomass, and explains the thermomechanical principles of heat transfer in the compost heater. The aim of the practical section of this work is to evaluate the measured data and verify the functionality of the compost heater assembled in the pilot experiment. The results confirm the compost heater is able to deliver the required power. However, its lifetime is closely dependent on the conditions of the compost environment. A key factor is not only a suitably chosen mixture for composting but also its thermal insulation. In the final section, examples of specific case studies based on the use of biomass for energy purposes, are presented.
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Meshfree methods for computational aeroacoustics
Bajko, Jaroslav ; Hlavička, Rudolf (referee) ; Čermák, Libor (advisor)
Bezsíťové metody reprezentují alternativu ke standardním diskretizačním technikám, které pro svůj chod vyžadují síť. V posledních desetiletích bylo vynaloženo mnoho úsilí k ověření konkurenceschopnosti bezsíťových metod v různých inženýrských odvětvích. Diplomová práce je zaměřena na aplikaci vhodné bezsíťové metody ve výpočetní aeroakustice. Stěžejní část této práce se zabývá úlohami šíření zvuku, které lze modelovat pomocí linearizovaných Eulerových rovnic. Obecně lze tyto rovnice zařadit mezi lineární hyperbolické systémy. Pro úlohy aeroakustiky se jako vhodná bezsíťová metoda jeví Finite point method (FPM), která byla úspěšně použita pro řešení úloh dynamiky tekutin. Odvozením této metody a návrhy k dosažení vysoké přesnosti se věnuje další část práce. Úlohy šíření zvuku se známým řešením jsou testovány vlastním softwarem vyvinutým speciálně pro tyto účely.
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The transfer of elliptic curves onto the torus
Bajko, Jaroslav ; Hrdina, Jaroslav (referee) ; Kureš, Miroslav (advisor)
Elliptic curves are an essential part of modern mathematics and play an important role especially in cryptography. The bachelor work focuses on the visualization elliptic curves and group operation in real plane and torus. In the first chapter we will introduce elliptic curves over field of real numbers and above all over prime fields. In order to describe the problematics rigorously the graphical outputs and also the experimental results in the field of discrete elliptic curves will be mentioned. In the next section we will pay a particular attention to topology, functions between topological spaces and to the introduction of the concept of smooth manifold. We will search the suitable functions which can transfer geometrical objects from the real plane onto torus. A software specifically developed for transfering the elliptic curves onto the torus works on the basis of aforementioned functions.
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Bioreactor monitoring and control for optimal heat gain
Hujňák, Jan ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
This bachelor thesis deals with thermal energy generation in biodegradation processes, monitoring and control of these processes. In the theoretical part, it gives a brief overview of biodegradation processes, then focuses only on processes in which waste heat is produced. Mainly it focuses on the composting process, its stage, the ideal composition of the composting material, the composting methods, the control quantities and the metering devices. The practical part focuses on the improvement of the original bioreactor and the subsequent realization of the new bioreactor. The bioreactor is subsequently monitored using temperature sensors that describe the ongoing processes inside the compost using measured temperatures. The aim of the bachelor thesis is to connect the bioreactor with yurt, to realize thermal circulation and to control this circulation through the AMiNi system in order to achieve optimal heat recovery without negative effects on the course of biodegradation processes inside the bioreactor.
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Bioreactor monitoring and control for optimal heat gain
Hujňák, Jan ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
This bachelor thesis deals with thermal energy generation in biodegradation processes, monitoring and control of these processes. In the theoretical part, it gives a brief overview of biodegradation processes, then focuses only on processes in which waste heat is produced. Mainly it focuses on the composting process, its stage, the ideal composition of the composting material, the composting methods, the control quantities and the metering devices. The practical part focuses on the improvement of the original bioreactor and the subsequent realization of the new bioreactor. The bioreactor is subsequently monitored using temperature sensors that describe the ongoing processes inside the compost using measured temperatures. The aim of the bachelor thesis is to connect the bioreactor with yurt, to realize thermal circulation and to control this circulation through the AMiNi system in order to achieve optimal heat recovery without negative effects on the course of biodegradation processes inside the bioreactor.
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Design and Implementation of Modular Bioreactor with Use of Wasted Heat
Peterka, Michal ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
The aim of the thesis is to extend the existing project of further use of waste heat from biodegradation processes and to improve bioreactor design. The first part summarizes the theoretical knowledge of the use of biomass and waste resources. The practical part is initially focused on the development of the bioreactor structure, the following part deals with the use of heat pipes for heat dissipation and the last chapter is about heating the fermenter and collecting the generated gas. Designed construction of the new bioreactor proved to have more advantages than the previous type. Heat pipes have a great potential for heat dissipation from the bioreactor, next steps should lead to a system of interconnected heatpipes and controlled heat dissipation. Biogas consumption initially seemed like a good idea, but the processes within the fermenter are more complex than expected. After a short time, the processes inside the fermenter have stopped, therefore this path of research will require further exploration.
|
|
|
Accumulation of energy from renewable sources
Charvátová, Marie ; Bajko, Jaroslav (referee) ; Fišer, Jan (advisor)
This bachelor’s thesis deals with the issue of accumulation of energy from renewable sources with a closer focus on electricity storage in the "small/home" scale. Delivering energy from renewable sources is highly variable and, in order to cover the time shift between production and consumption, energy must be stored. In the paper are described individual types of energy used in residential housing, sources of renewable energy are presented and various ways of energy accumulation are analyzed. The greatest attention is paid to chemical accumulators, because they are the most suitable solution for home use due to their practicality. At the end of the thesis, operational data from a small demonstration photovoltaic power plant with accumulation of electric energy in chemical accumulators are processed and evaluated.
|
|
|
Compost heating system for the hot water preparation
Dokoupilová, Bára ; Baxant, Petr (referee) ; Bajko, Jaroslav (advisor)
Using energy that is generated during decomposition processes in organic matter, is the fundamental theme of this thesis. While the following research succeeds to present the possibility of heat recovery using a compost heater, it also introduces composting in the context of ecology and global warming. The work analyses biochemical processes taking place in the decomposition of biomass, and explains the thermomechanical principles of heat transfer in the compost heater. The aim of the practical section of this work is to evaluate the measured data and verify the functionality of the compost heater assembled in the pilot experiment. The results confirm the compost heater is able to deliver the required power. However, its lifetime is closely dependent on the conditions of the compost environment. A key factor is not only a suitably chosen mixture for composting but also its thermal insulation. In the final section, examples of specific case studies based on the use of biomass for energy purposes, are presented.
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