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Stochastic Optimization Models in Energy Industry
Studený, Vojtěch ; Cabalka, Matouš (referee) ; Popela, Pavel (advisor)
This diploma thesis addresses the modeling of electricity production from rooftop photovoltaic power plants. The aim of the work was to find out how the input parameters affect the return and to find out the optimal conditions for achieving the shortest return time. The model is created in Microsoft Excel and GAMS. The inputs include the current conditions of the New Green Savings grant program. The work separately examines systems without energy storage and systems with batteries. Both systems are optimized and then the change in return depending on random variables is determined. The results show a lower payback period for battery systems, while meeting the subsidy conditions at the same time with lower acquisition costs.
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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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Stochastic Optimization Models in Energy Industry
Studený, Vojtěch ; Cabalka, Matouš (referee) ; Popela, Pavel (advisor)
This diploma thesis addresses the modeling of electricity production from rooftop photovoltaic power plants. The aim of the work was to find out how the input parameters affect the return and to find out the optimal conditions for achieving the shortest return time. The model is created in Microsoft Excel and GAMS. The inputs include the current conditions of the New Green Savings grant program. The work separately examines systems without energy storage and systems with batteries. Both systems are optimized and then the change in return depending on random variables is determined. The results show a lower payback period for battery systems, while meeting the subsidy conditions at the same time with lower acquisition costs.
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Použití polyvinylpolypyrrolidonu a možnosti jeho regenerace v nápojovém průmyslu
Šajtarová, Pavla
This diploma thesis is focused on the topic The use of polyvinylpolypyrrolidone and possibilities of its regeneration in the beverage industry. The thesis was written in years 2015/2016 at the Department of Post-Harvest Technology of Horticultural Products, Faculty of Horticulture at Mendel University in Brno. The theoretical part deals with the polyphenolics compounds in wine, antioxidant capacity and wine defects related to polyphenols. The last chapter offers multiple methods of removing defects, where the highest priority is given to the clarifier PVPP. The experimental part is aimed at the regeneration of single used PVPP with four different ways and the determination of its efficiency throughout suitable analyses after its reuse in the wine. The resulting data are statistically processed and shown in the graphs.
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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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