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Cogeneration units for family houses
Pekárek, Michal ; Toman, Filip (referee) ; Kracík, Petr (advisor)
The scope of this bachelor’s thesis is basic design cogeneration unit in family house. The work is divided into three parts. The first part includes a summary of suitable cogeneration units. For each technology is mentioned short description with advantages and disadvantages. Based on this information was made a conclusion, that the most suitable microcogeneration units are with combustion engine, Stirling engine and fuel cells. This section focuses on legal requirements, which are connected with the application in family houses. The last section deals with the application in a specific family house. Heat loss of family house is 12,4 kW, amount of heat we have to provide for heating and warm water is 41,7 MWh and during the year was used 3,15 MWh of electricity. We have decided to design three different variations, all traffic-related cost and revenues are calculated for each design. In conclusion, they are compared with original state of energy supply to the family house.
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Stirling engine
Mader, Dan ; Jedelský, Jan (referee) ; Hejčík, Jiří (advisor)
Presented bachelor thesis deals with study of constructional variations of Stirling engine that work in reverse as heat pump for cooling. First chapter contains history and functional principle of Stirling engine. Second chapter describes Stirling cycle for various devices. The following chapters consist of constructional variations which are divided into three application categories: commercial, military technical, space. In last chapter are these variations compared together and possible future of these devices is being predicted. Result of this thesis is theoretical analysis of Stirling cryocoolers that are based on Stirling engine.
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Crankshaft mechanism of Stirling engine
Valčík, Martin ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This diploma thesis is focused on the design of the driving mechanism of Stirling engine, where was chosen modification of these engines with rhombic drive. Subsequently is constructed kinematical, dynamical and thermomechanical mathematical model. Finally, is going from these models for execution strength control and drawing documentation.
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Low-output Microcogeneration
Kalina, Leoš ; Škorpík, Jiří (referee) ; Lisý, Martin (advisor)
This bachelor thesis focuses on obtainable microcogeneration technologies for detached houses and separated in two parts. The first part deals with a division of this technology, description of specific units and their advantages and disadvantages. The second part is an economical and technical assesment of a biomass microcogeneration unit for a detached house.
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Stirling engine
Blažek, Petr ; Hromádko, Jan (advisor) ; Mařík, Jakub (referee)
The aim of this thesis is to introduce the Stirling engine, to evaluate its potential use in practice and to propose possible further development in this area. The first part is devoted to the historical development of the Stirling engine. The next part contains brief explanation of its function, describes the individual components, introduces all modifications and evaluates the main advantages and disadvantages. The last part deals with the use of the engine with respect to its properties, structure and possible design.
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Alternative sources of nuclear energy
Svoboda, Josef ; Zlámal, Ondřej (referee) ; Katovský, Karel (advisor)
In places where it is not possible to use conventional production and distribution of energy, autonomous sources take over. Most of autonomous sources use solar energy, wind energy and other renewable resources. For applications such as special missions into outer space the usage of conventional sources is not possible. Except for powering special satellites, unconventional nuclear sources are also used in autonomous unmanned objects located in distanced areas with extreme natural conditions. It is also used in unusual propulsions of ground, water and air machine. These vehicles are for example pacemaker powered by radioisotope source, submarines, aircrafts and other vehicles supplied by nuclear reactor of unconventional conception. In this bachelor thesis there are globally summarized questions connected with unconventional sources of nuclear energy with detailed description of chosen parts. This work is concerned with finding more efficient machinery for conversion of heat energy supplied by radioisotope decay to electric energy.
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Usage of Busbar as a Source of Heat
Svoboda, Ondřej ; Macháček, Jan (referee) ; Radil, Lukáš (advisor)
This study is dedicated to the use of heat energy from the busbar and its cooling system. The study deals with thermal analysis of the busbar, both using numerical simulations in SolidWorks and practical examination – warming of the busbar. We can verify the correctness of the simulation from the measured values. To determine the temperature profile of the busbar, it is necessary to measure the temperature at various points of the busbar by contact method using thermocouple or contactless method using a thermal imager. Measurements are performed at the busbar LIA1600 made by Siemens Busbar Trunking System Mohelnice. The aim of the study is to analyze temperature busbar, to suggest the most efficient method of heat recovery, and to make economic calculation
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Stirling Engine
Vondruš, Jan ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This bachelor thesis deals with the description and calculation of a closed regenerative thermodynamic cycle. In the theoretical part of the thesis, there is described history of the engine, the principle of its function, differences between particular design variants, and the use of the engine in the past and nowadays. In the other part of the work, there is described the principle and calculation of ideal Stirling cycle. In addition, there are included positives as well as negatives of applying the heat devices based on this cycle. Practical part of the work deals with the calculation of ideal Stirling cycle with the use of Schmidt theory. The primary aim of this bachelor thesis is then to compare and contrast the results gained from both of the calculation methods. In the end, the results of the thesis show that the use of Schmidt theory gives lower, i.e. more accurate, values of engine's parameters compared to the use of Stirling ideal cycle.
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Low potential heat for electrical power generation
Dobiáš, Jiří ; Radil, Lukáš (referee) ; Bartošík, Tomáš (advisor)
This bachelor’s thesis deals with low potential heat sources for electrical power generation. It mentions primarily low potential heat sources, their distribution by origin and where you can find such resources. Another part deals with the technology that uses low potential heat to heat production of higher temperature level and power generation. These are discussed here with a heat pump, regenerative heating, Stirling engine, solar collectors, Peltier cells, etc. In addition is to their use in practice. The last chapter deals with the replacement of the heater in the regeneration heating coil from the solar collectors. It is thus the use of renewable energy sources. Carry out technical and economic calculations for the real utility of such a plan.
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The Stirling Thermodynamic Cycle
Macháček, Jan ; Sokanský, Karel (referee) ; Kyncl, Jan (referee) ; Gregor, Jan (advisor)
My doctoral thesis deals with study and analyse of Stirling thermodynamical cycle. Cycle that is composed of two isochoras and two isotherms. I describe functional principle of Stirling engine and all its parts, constructional variations of pistons system and possible engine working modes. Next chapter contains analyse of engine constructional parameters. Measuring of torque and load characteristics, p - V schemes and output work for various engine inputs is part of this analyse. There is composed mathematical engine characterization by means of Schmidt theory in chapter five. Mathematical characterization is consequently applied to engine model. Theoretical analysis and practical measurement were base for concepts, realization and verification of constructional correction. One part of my thesis is attended to design of new lamella for regenerative exchanger. For optimal lamella constructional proportions were used computational algorithm and simulations. There is concept of cogeneration unit with Stirling engine and its benefits check in last chapter. General theoretical and practical analyse of workable Stirling engine is result of my thesis. Analyse in this extent was not nowhere publishing yet. Design of regenerative exchanger lamella is then practical input of my thesis.
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