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Design of Stirling Engine Operating at Low Temperature Difference
Gavač, Adam ; Kolář, Ladislav (referee) ; Sedlák, Josef (advisor)
The aim of this study is to acquaint the reader with the Stirling engine, which is one of the possible alternatives to generally known combustion engine. The theoretical part has three major purposes: First is to describe thermodynamics of the Stirling cycle in the range that is essential for comprehension of the engine`s operating principle. Second is to mathematicaly derivate expression for the efficiency of the ideal Stirling cycle. Third is to discuss each of the essential parts of the device. Concepts acquired in the theoretical part were employed to design a digital model in the parametric modeler Autodesk Inventor. Parts were manufactured by a combination of typical and progressive technologies. Engine was assembled and tested afterwards.
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Crankshaft mechanism of Stirling engine
Smékal, Tomáš ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This article contains description of basic principles of stirling engine, construction types and its parts, which supplies motor run and description of using in real life too. The main topic is analyses of driving mechanism supplying both pistons movement of stirling engine on Robert Stirling‘s drawing from 1816.
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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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Stirling engine 3kW combustion chamber
Matuška, Petr ; Zháňal, Lubor (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with the construction proposal of the combustion chamber of Stirling engine. The introduction briefly describes the history and practical application of Stirlinova engine today. The following section explains the differences between theoretical and real cycle and the principle of beta Stirling engine modifications. The next section is devoted to the calculation of fuel and air consumption and fuel compared to each other. The proposed design is based not only on the calculation of fuel and air, but also heat transfer between flue gas and preheated air. The last part is devoted to calculating the flow of LPG and flow model of the combustion chamber.
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Model of Stirling Engine in PSCAD
Gallo, Michal ; Kopička, Marek (referee) ; Radil, Lukáš (advisor)
This dissertation about the Stirling engine deals with the history and formation of the heat engine. At the beginning of this work, fundamental parts and their functions are described, elucidating the principle of operation explained by the thermodynamic cycle and subsequently comparing the ideal and the real Stirling cycle and last but not least provides various modifications whilst describing their differences. The mathematical model of the Stirling engine is processed by Schmidth’s theoretical analysis and thereafter is created in PScad v46. The process of creating a model is shown in one of the chapters of this dissertation. The results were taken into account in the design of 3D models in Inventor Professional by Autodesk. The work concludes with the evaluation of the computational model and its functionality as well as the documentation of the 3D model.
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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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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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Micro-cogeneration
Štukavec, Karel ; Škorpík, Jiří (referee) ; Pospíšil, Jiří (advisor)
The topic of this bachelor‘s thesis is microcogeneration for single family houses. The work consists of two main parts. The first part includes division, technical description, commercial use, energy sources, advantages and disadvantages of microgenerational units. The second part talks about technical-economical assessement of microgeneration units with combustion engine and fuel cell.
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