|
|
Accumulation of energy from renewable sources
Charvátová, Marie ; Bajko, Jaroslav (referee) ; Fišer, Jan (advisor)
This bachelor’s thesis deals with the issue of accumulation of energy from renewable sources with a closer focus on electricity storage in the "small/home" scale. Delivering energy from renewable sources is highly variable and, in order to cover the time shift between production and consumption, energy must be stored. In the paper are described individual types of energy used in residential housing, sources of renewable energy are presented and various ways of energy accumulation are analyzed. The greatest attention is paid to chemical accumulators, because they are the most suitable solution for home use due to their practicality. At the end of the thesis, operational data from a small demonstration photovoltaic power plant with accumulation of electric energy in chemical accumulators are processed and evaluated.
|
|
|
Hydrogen for Power
Kocman, Lukáš ; Pospíšil, Jiří (referee) ; Skála, Zdeněk (advisor)
The increasing use of hydrogen in modern energy, has become the motive for writing this work. The work is focused on hydrogen energy and its aim was to compile an overview of hydrogen production technologies, the use of hydrogen technologies in current energetics and the use of hydrogen to energy accumulation. In addition to describing current hydrogen technologies, this work also includes examples of hydrogen devices and projects that we may encounter today. An overview of the above-mentioned technologies has shown that, despite some of its shortcomings, hydrogen has a significant application in current energetics, that is expected to increase in the coming years.
|
|
|
Utilizing of wind energy with accumulation
Mészáros, Gabriel ; Chroboczek, Libor (referee) ; Pospíšil, Jiří (advisor)
The introduction of this paper deals with wind-powerplants, their components and distribution according to their construction and output. Technologies of accumulation of energy are described, because the conditions for energy production from wind are not constant (windlessness, storms, etc.). The technologies are compared in terms of economics and technology. A basic design for a system with accumulation is made at the end of the thesis.
|
|
|
The diagonal pump in turbine regime
Šimunek, Ondřej ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
The thesis is focused on hydraulic design of a semi-axial pump with an axial diffusor with guide vane. The pump is designed with respect to the turbine mode so that it can be used for low-potential energy harvesting or energy storage. The design of the pump is assessed by numerical fluid mechanics using commercial software Ansys CFX.
|
|
|
Accumulation of Energy from Renewable Energy Sources
Heller, Ondřej ; Radil, Lukáš (referee) ; Mastný, Petr (advisor)
The objective of the first part of master’s thesis is mapping the potential of various types of renewable sources in Europe and Czech Republic, especially solar energy, wind energy, water energy and biomass. There are described principals and ways of energy generation from these sources, brief overview of current technologies, and also their advantages and limitations. An important part is electric supply continuity from renewable sources, there are large differences and the resulting to restrictions on construction and connecting the units to the power system. In this work there are mentioned some impacts on network and rates of change of supply, some sources are also evaluated in terms of maximum power, that can be connected to the power system in our country. The conclusion of the first part is dedicated to energy storage technologies, which are suitable and usable for renewable sources, there are described their principals, properties, status of development and types of aplications, in which these technologies are used. This chapter also focusses on the price level of each technology. The second part of the thesis deals with 1 MWp on-grid photovoltaic power plant design. This design includes also the redox flow batteries accumulation, the first variant calculates on 24-hour steady energy supply, the second optimalized variant calculates on daily energy supply. There are the accumulation system costs estimated and also the payback period for the both variants. Additionally there is also determined minimum penalization for cost-effective operation. The last part is dedicated to changes of impact on the local grid and changes of system impacts, after the accumulation system is installed.
|
|
|
Compressed-air energy storage
Strnad, Jan ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The bachelor thesis is focused on the problematics of compressed air energy storage. It includes a short introduction to the thermodynamics of ideal gases. The suitable geological conditions for the selection of CAES (compressed air energy storage) systems, the advantages and disadvantages of each type, the method of their production, and the process of compressed air accumulation itself were discussed. The thesis presents individual diagrams of compressed air power plants, and special attention is given to the description of the accumulation process. The last section is focused on the description and comparison of two built CAES systems working on an identical concept and also presents information on the unrealized planned CAES systems.
|
|
|
Hydrogen as a storage medium
Ventura, Jan ; Zeizinger, Lukáš (referee) ; Štětina, Josef (advisor)
This thesis focuses on various means of hydrogen production with focus on ecological side of each method. Closer attention is given to, so called, blue hydrogen that tends to be considered as one of the ecological ways of producing hydrogen. Next section focuses on hydrogen storage and their comparison based on efficiency, viability and security of each method. Aim is than directed towards comparison of hydrogen and battery energy storage. This comparison is based on efficiency and ability of each method to hold large amounts of energy for extended periods of time. Main outcome of this thesis is creation of theoretical computational model of hydrogen energy accumulation system based on data of energy production of C3 building of FME BUT complex. Based on outcome of this model, specific components were chosen for real life application and an approximate price estimation was made as well as comparison with equivalent battery energy storage. Final step was designing a modular hydrogen storage.
|
|
|
Using artificial intelligence for energy management in smart buildings
Michálek, Jiří ; Mikulášek, Michal (referee) ; Jablončík, Lukáš (advisor)
This master’s thesis deals with the problem of home energy and energy management in the house using artificial intelligence algorithms. Its objective is to analyse the available energy resources on a small and medium scale, including resources that are currently under research with a future perspective. Additionally, its objective is to explore the field of artificial intelligence and its application in the energy sector, to develop a design for a home photovoltaic power plant and to design a control algorithm with artificial intelligence elements. As a result of the thesis, the research analyses energy resources, fundamental types of artificial intelligence and specific applications of artificial intelligence in the energy sector. The work includes the design of the electrical installation of a home photovoltaic power plant. In the thesis was developed an overview of the requirements for energy management algorithms for buildings. Based on this overview, a control algorithm was designed. Within the design of the algorithm was applied neural networks as artificial intelligence elements.
|
|
|
Regional waste-to-energy systems
Krňávek, Martin ; Jelemenský, Karol (referee) ; Jegla, Zdeněk (referee) ; Stehlík, Petr (advisor)
The doctoral thesis deals with regional energy utilization of municipal waste, sewage sludge and hazardous medical waste. In the first part of the thesis, the conditions under which waste-to-energy plants can be effectively integrated into regional energy supply system are assessed. In this introductory part, the current energy situation, legislation as well as waste in the Czech Republic are analyzed. Furthermore, the possibilities of integration at different levels in relation to the WtE plant and the complex waste management concept are described. In the next part of the thesis, the possibilities of long-term and short-term energy accumulation for the WtE plant are assessed. From the point of view of short-term energy accumulation, warm water, hot water and steam accumulators are assessed and from the point of view of long-term energy accumulation, the storage of plastic and bulky waste and sewage sludge is analyzed. The created techno-economic models of modern technologies for energy utilization of municipal waste, sewage sludge and hazardous medical waste are described in the main part of the thesis. In the last part of the thesis, the proposed techno-economic models are applied to the conditions of the specific region, and the effectiveness of tailor-made solutions respecting the 3E (environmental protection, energy situation and economic aspects) is demonstrated on this example.
|
|
|
The diagonal pump in turbine regime
Šimunek, Ondřej ; Veselý, Jindřich (referee) ; Haluza, Miloslav (advisor)
The thesis is focused on hydraulic design of a semi-axial pump with an axial diffusor with guide vane. The pump is designed with respect to the turbine mode so that it can be used for low-potential energy harvesting or energy storage. The design of the pump is assessed by numerical fluid mechanics using commercial software Ansys CFX.
|
guest ::
