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Methods of correction performance parameters of the diesel engine
Charouz, Ondřej ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with obtaining the most suitable way of correcting the influence of intake air pressure, temperature and humidity as well as correcting the influence of fuel properties (diesel fuel). These correction factors are adapted to a specific engine for military use. It is a four-stroke, diesel, turbocharged, 6-cylinder engine, PV6-K37, with a displacement of 19100 cm3. This work also deals with the creation of a methodology for the measurement of this motor at the engine station and with the treatise on current methods of power correction. The measurements were made in the premises of Excalibur Army Ltd. in Šternberk.
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Partial Solution of Hybrid System with Low-Temperature Fuel Cells and Renewable Sources
Ptáček, Michal ; Mišák, Stanislav (referee) ; Tlustý,, Josef (referee) ; Matoušek, Antonín (advisor)
The thesis deals with the principle functions of low-temperature fuel cells with proton exchange membrane (PEMFC), photovoltaic sources (PVPP) and wind energy sources (WPP), along with solving their detailed mathematical expressions. In this work, the individual sources and their simulated models are analyzed in depth. The actual simulation is preceded by familiarization with important historical milestones in the development of fuel cells. Furthermore there is a basic classification of fuel cells and the characteristics of the cells used in the energy sectors. The text also provides information on projects that address the implementation of PEMFC as a primary or supplementary source of energy. Along with outlining the options for PEMFC as a perspective hydrogen technologies in the near future, the basic methods of hydrogen production and storage options are presented for the complexity. The work is exclusively focused on improving PEMFC mathematical models that under the hybrid system cooperate with renewable energy sources (RES). Part of the theses contains a short review of run or modeled concepts of hybrid systems in the energy sector. Using these models the main deficiencies of the models or of the whole PEMFC system can be identify. Specifications of the deficiencies lead to the creation of a new advanced dynamic PEMFC model that allows an analysis of the development of electrical and non-electrical quantities using long term tests. Furthermore, the thesis presents results of the experiments of thermal and dynamic behavior PEMFC, which were obtained from the additionally extended model with a reformer and the DC/DC converter. In this text there is a model of a photovoltaic module created, which is based on the nominal values parameterization. The model is subjected to basic experiments in which measured hydrometeorological data are used. If the hybrid system utilizes renewable energy sources, it is good to know the evolution of atmospheric conditions in the installation of these resources. Specifically for PVPP, publicly available databases containing information about solar radiation levels can be used for the selected location. Public databases are often used for initial design and manufacturing options for PVPP. An evaluation of the relevancy of public databases is performed based on a long-term observation of real measured data. Furthermore, these data are used for experiments on the photovoltaic module. Partially the text addresses the issue of the wind energy sources, however, it is simulated only on a simplified model of WPP. Created models of subsystems can be generally implemented as partial inputs hybrid systems in the future work. The thesis was developed at Centre for Research and Utilization of Renewable Energy (CVVOZE) with the financial support of the National Programme for Sustainability and the Ministry of Education, Youth and Sports of the Czech Republic under the project no. LO1210 - Energy for Sustainable Development and the project no. FEKT-S-14-2520 - New Technologies for Sustainable Development of Electrical Power Systems. The thesis was also generated under the project no. TA03020523 - Dynamic model of distribution network with the financial support of Technology Agency of the Czech Republic.
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Quantum Cryptography And Laser Data Transfers
Litwora, Martin ; Maršík, Lukáš (referee) ; Zemčík, Pavel (advisor)
The purpose of this work was to explore and describe the possibilities of quantum key distribution. Describe individual protocols based on quantum mechanics, and different variants of quantum channels of wireless laser connections. At the same time, analyze individual encryption algorithms from the point of view of their security, energy consumption and encryption speed. Furthermore, part of the work included measuring the transfer properties of a real system for the quantum key distribution, including measuring the attenuation of a given connection using an attenuation cell. The goal then was to apply the measurement results to laser data transfers. Laser connections are affected by atmospheric conditions, especially cloud cover. For these purposes, a simulation tool was created that serves to simulate laser quantum channels in the atmosphere.
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Methods of correction performance parameters of the diesel engine
Charouz, Ondřej ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with obtaining the most suitable way of correcting the influence of intake air pressure, temperature and humidity as well as correcting the influence of fuel properties (diesel fuel). These correction factors are adapted to a specific engine for military use. It is a four-stroke, diesel, turbocharged, 6-cylinder engine, PV6-K37, with a displacement of 19100 cm3. This work also deals with the creation of a methodology for the measurement of this motor at the engine station and with the treatise on current methods of power correction. The measurements were made in the premises of Excalibur Army Ltd. in Šternberk.
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Partial Solution of Hybrid System with Low-Temperature Fuel Cells and Renewable Sources
Ptáček, Michal ; Mišák, Stanislav (referee) ; Tlustý,, Josef (referee) ; Matoušek, Antonín (advisor)
The thesis deals with the principle functions of low-temperature fuel cells with proton exchange membrane (PEMFC), photovoltaic sources (PVPP) and wind energy sources (WPP), along with solving their detailed mathematical expressions. In this work, the individual sources and their simulated models are analyzed in depth. The actual simulation is preceded by familiarization with important historical milestones in the development of fuel cells. Furthermore there is a basic classification of fuel cells and the characteristics of the cells used in the energy sectors. The text also provides information on projects that address the implementation of PEMFC as a primary or supplementary source of energy. Along with outlining the options for PEMFC as a perspective hydrogen technologies in the near future, the basic methods of hydrogen production and storage options are presented for the complexity. The work is exclusively focused on improving PEMFC mathematical models that under the hybrid system cooperate with renewable energy sources (RES). Part of the theses contains a short review of run or modeled concepts of hybrid systems in the energy sector. Using these models the main deficiencies of the models or of the whole PEMFC system can be identify. Specifications of the deficiencies lead to the creation of a new advanced dynamic PEMFC model that allows an analysis of the development of electrical and non-electrical quantities using long term tests. Furthermore, the thesis presents results of the experiments of thermal and dynamic behavior PEMFC, which were obtained from the additionally extended model with a reformer and the DC/DC converter. In this text there is a model of a photovoltaic module created, which is based on the nominal values parameterization. The model is subjected to basic experiments in which measured hydrometeorological data are used. If the hybrid system utilizes renewable energy sources, it is good to know the evolution of atmospheric conditions in the installation of these resources. Specifically for PVPP, publicly available databases containing information about solar radiation levels can be used for the selected location. Public databases are often used for initial design and manufacturing options for PVPP. An evaluation of the relevancy of public databases is performed based on a long-term observation of real measured data. Furthermore, these data are used for experiments on the photovoltaic module. Partially the text addresses the issue of the wind energy sources, however, it is simulated only on a simplified model of WPP. Created models of subsystems can be generally implemented as partial inputs hybrid systems in the future work. The thesis was developed at Centre for Research and Utilization of Renewable Energy (CVVOZE) with the financial support of the National Programme for Sustainability and the Ministry of Education, Youth and Sports of the Czech Republic under the project no. LO1210 - Energy for Sustainable Development and the project no. FEKT-S-14-2520 - New Technologies for Sustainable Development of Electrical Power Systems. The thesis was also generated under the project no. TA03020523 - Dynamic model of distribution network with the financial support of Technology Agency of the Czech Republic.
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