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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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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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Study of Stirling Engine
Němec, Jan ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This work deals with the structural design of the Stirling engine beta modifications for increasing the thermal efficiency of the regenerator. This work is an attempt to propose a regenerator, or propose ways of working fluid through the heater and the heat exchanger to cool the chamber. All using different design elements. Furthermore, this work deals with stress analysis using computer software.
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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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Measurement of Stirling engine
Kovář, Michal ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This thesis describes the design chain to indicate the measuring cylinder Stirling engine. It describes the practical problems of measurement methodology and highlights the possible pitfalls of the measuring chain. For measuring the use of pre-existing model of gamma Stirling engine modification. It was carried out systematic measurement and evaluation of measured data. As a mathematical model for comparison with the measured data was used ideal cycle and Schmidt theory.
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Stirling Engine
Blaha, Josef ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This dissertation discusses Stirling’s cycle and its contribution using different approaches. There are calculation of Schmidt’s theory and distinctiveness between ideal and real cycle described. Based on my previous research, this work provides a detailed summary of different methods which are used to stimulate Stirling’s cycles as well as the motor as a whole. Attention is particularly dedicated to current utilization of this machine which is not broadly known within general public.
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Solutions for using micro cogeneration in places where are not primarily available gas or liquid fuels
Kubínek, Martin ; Štelcl, Otakar (referee) ; Vojáčková, Jitka (advisor)
This bachelor´s thesis deals with the usage of micro cogeneration units in the places where gas and liquid fuels are not primarily available. In the research part, the available technologies and the current condition of the market of micro cogeneration units, which use solid fuels, especially biomass, are described. In the technical-economical part, there is a design of the specific unit whose thermal output corresponds to the thermal rated loss of the chosen building. The payback period of the unit with a gasifier and with a combustion engine is estimated in the cases when the chosen building is currently heated by: lignite, wooden chips, electricity and the combination of natural gas and coke.
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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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Computational model of heat cycle of Stirling engine
Horák, Jiří ; Hejčík, Jiří (referee) ; Jedelský, Jan (advisor)
This Bachelor´s Thesis deals with heat circulation of a Stirling engine according to the Schmidt theory. In the first part of the thesis there is a short view and characteristic of computational methods for Stirling engine and there are also a few computational models illustrations. The second part describes the Schmidt idealization and its process within the program environment. The final part of the thesis is focused on the realization of the optimal parameters design using a computational model as well as on the comparison of theoretical results with real measured value.
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