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Thermionic generators
Primes, Alois ; Pospíšil, Jiří (referee) ; Brázdil, Marian (advisor)
This bachelor thesis deals with thermionic generators. In the first part of the thesis thermionic conversion principle and related physical phenomena are described. In the next part, the distribution of thermionic generators according to the construction is presented. The performed research shows that currently vacuum thermionic generators are being tested. This is followed by an overview of selected thermionic generators, and the purpose for which they were designed and the results achieved. It has been found that electric heating was used for experimental purposes, which can artificially increase the efficiency of the tested devices. The conclusion is dedicated to the performance and efficiency of thermionic devices and their possible use in the near future. It can be assumed that some types of thermionic generators will be used in power plants using high-temperature heat sources to increase their efficiency.
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Low temperature fuel cell for ultra-light-plane
Hladiš, Lukáš ; Brázdil, Marian (referee) ; Pospíšil, Jiří (advisor)
This thesis deals with the concept of propulsion for ultralight plane with using fuel cells technology. Here are described the individual kinds of fuel cells and possible fuel. Furthermore it is listed the calculation of low-temperature fuel cell H2 - O2 with polymeric membrane (PEM). The thesis includes also a part with the design drawings of the proposed solutions.
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Thermoelectric generator for flue-gas duct of boiler to convert low-temperature waste heat to electricity
Třináctý, Jiří ; Baláš, Marek (referee) ; Brázdil, Marian (advisor)
With the dwindling supply of fossil fuels is increasing interest in the most efficient use of primary energy sources. In many of today's devices leaving a considerable part of the fuel energy wasted in the form of waste heat. As a partial solution suitable to demonstrate the application of thermoelectric generator, or devices that convert heat energy directly into electrical energy. The trend in recent years shows the growing interest in this technology and the development of new thermoelectric materials. In addition to the use of waste heat thermoelectric generators can be found in a number of other applications, primarily as a source of electricity in conditions where required minimal maintenance, reliability, reliability and durability. Text is divided into three parts: a theoretical part, the part dealing with the design and implementation of the generator, and a final evaluation. The theoretical part includes a description of the basic thermoelectric phenomena, thermoelectric materials and their properties, a description of the main components of thermoelectric generators and applications in which the thermoelectric conversion uses. Part of the design and implementation deals with the design of thermoelectric generator for chimney flue and comparison of the proposal with real measured values.
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Modern Application for Household Heating
Šoupal, Filip ; Brázdil, Marian (referee) ; Lisý, Martin (advisor)
This bachelor thesis is focused on the research of basic sources, methods, and possibilities of heating modern family houses. The thesis is divided into three parts, the first one is focused on the advantages and disadvantages of individual heating sources in the use of renewable and non-renewable energy sources. The next section thoroughly describes and compares the methods of heating considering current emission standards. At the end, there is a technical and economic comparison of the variant of the current gas boiler with the variant of the automatic coal boiler and the modern heat pump. The comparison in interpreted on a model house through performed calculations. For better accuracy, the thesis is enhanced with pictures and tables.
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Measurement of thermoelectric modules
Martynek, Filip ; Baláš, Marek (referee) ; Brázdil, Marian (advisor)
This thesis describes principles of thermoelectric change, crucial parameters of thermoelectric modules and issues of its measurements. Theoretical part of this research is aimed on describing thermoelectrical phenomena, composition of thermoelectric pair and modules, naming searched parameters and issues that occurred during its measurements. Further in detail describes chosen testing approaches. In the end these methods are concluded and compared. Practical part contains description of testing device and experimental measurement of thermoelectric module.
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Automatic pellets boilers
Bureš, David ; Brázdil, Marian (referee) ; Baláš, Marek (advisor)
The thesis is divided into two main parts. The first one deals with the research study about pellets used as a fuel, and about automatic pellet boilers. The second part describes experimental measurements on the boiler Verner A251.1, followed by calculation of the efficiency and a comparison of emission, using wood pellets of different diameters.
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Energy use of biomass
Musilová, Petra ; Brázdil, Marian (referee) ; Baláš, Marek (advisor)
The objective of this bachelor’s thesis is a research study of biomass use in energy industry with main focus on electric energy production. This thesis primarily concerns with biomass properties, biomass processing technologies and the application of such technologies in the Czech Republic. The first part of this work consists of biomass definition and its division. The next part deals with biomass energetic properties and following is a familiarization with cogeneration (the combined use of heat and power to create electricity). Furthermore this thesis analyses individual technologies used in electricity production. The last part focuses on heating plants, power stations and biogas plants, which use biomass and on charting these specific units in the Czech Republic.
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Topical and Advanced Possibilities of Heating by Thermal Pumps
Božek, Michal ; Brázdil, Marian (referee) ; Lisý, Martin (advisor)
The bachelor's thesis is focused on search of one of the many methods of home heating systems, specifically on heat pumps. The first part describes the structure of heat pumps, the principle of how they work, main types, their two most important parameters and comparison of them to other systems of heating. The second part contains comparison of individual heating systems from economical point of views on a selected model house.
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Rankin cycle for waste heat recovery of internal combustion engines
Kučinský, Josef ; Fiedler, Jan (referee) ; Brázdil, Marian (advisor)
This bachelor thesis deals with Rankine cycle as a method of waste heat recovery for internal combustion engine. Firstly, internal combustion engine and some technologies on waste heat recovery are described simply. Secondly, Rankine cycle and its utilization in automobiles are overviewed. At the end, there are summarized results from simulations and experiments regarding the issue. It was stated in a conclusion that in case of waste heat recovery in automobile, Rankine cycle is a promising technology but it is not ready for wide application yet.
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Analysis of energy supply for the complex of buildings Technicka 2
Šimková, Nikola ; Pospíšil, Jiří (referee) ; Brázdil, Marian (advisor)
The diploma thesis on the topic "Energy supply of the Technical 2 complex" deals with the energy supply of the Faculty of Mechanical Engineering of the Brno University of Technology. The area is a major consumer of energy and is dependent on supplies from the distribution system. At the beginning of the work there is an analysis of the current energy supply. There are two photovoltaic power plants in operation, which reduce electricity consumption. However, they were installed in 2006 and 2016, so their current performance must be analysed. The following section evaluates the technical feasibility of extending photovoltaic power plants to other building’s roofs in the area and then the final variant is evaluated from an economic point of view regarding the possible development of electricity prices. The possibilities of obtaining funds from the ongoing grant calls and future grant programs are also described.
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