This thesis deals with the geopolitical aspects resulting from the increasing EU dependence on natural gas imports from the external suppliers. In addition to the investigation into he current situation of the EU market with natural gas, nature of major suppliers is explored, the thesis tries to identify the main risks to the security of supplies, especially the possibility of politically motivated supply disruption. From a broader perspective, it scrutinizes whether the natural gas market is driven by the market-based principles and regulated by international organizations (Market and Institutions scenario) or the bilateral relations between producer and consumer are the decisive factor (Regions and Empires scenario). Furthermore, the analysis of relevant documents issued by the EU institutions is also included and the thesis aims to assess the feasibility of the single 2 European external energy policy. Finally, the thesis includes two case-studies: the first one is dealing with energy relations between Russia and Belarus and Ukraine. The second one is dedicated to the Nord Stream gas pipeline project.

The aim of the thesis is to design a heat exchanger for heating natural gas in the mining process and subsequent treatment. The first part describes natural gas itself, its origin, mining and ways of treatment. There are described technologies used for finding the deposits itself or processes by which water, sulfur and solid particles are removed from the extracted gas. The next section deals with the types of heat exchangers most commonly used in industry. There are also described basic relations for heat-hydraulic calculation of heat exchanger. In the practical part the heat exchanger itself was designed. World-wide HTRI software was used for the heat-hydraulic calculation and for strength calculation according to the standard ČSN EN 13445 was used sofware Sant´ Ambrogio.

The diploma thesis is focused on district heat supply, heat sources, machinery and safety equipment of boiler rooms. The main goal of the thesis is to modernize parts of the heat sources with the respective boiler room equipment in accordance with the latest available technology. The generated thermal energy is used for heating or hot water production for residential and non-residential buildings in the vicinity of the boiler room. In the theoretical part, the thesis focuses in more detail on boiler rooms, specifically on heat energy sources, machinery and safety equipment of boiler rooms, system ventilation and combustion exhaust. The findings are applied in the design of the new boiler room layout. It is followed by a detailed description of the current state of the boiler room and heat networks. An essential part of the work is the assessment of layout of the current heat sources and the creation of a new design for the replacement of insufficient sources and related equipment. The last goal is an economic overview of the designed project solution.

This thesis deals with Sector coupling problematics. First, it deals with the development and present situation in the generation and consumption of electric power and the development and present situation in the extraction and consumption of natural gas in the Czech Republic and in the European union. Further, the thesis deals with Sector coupling, this concept is explained, and it is adumbrated what questions it deals with. Then, the technologies that can be achieved in the future of Sector coupling are introduced. Pilot projects of these technologies are presented as part of the discussion about these technologies. Finally, a consideration of the future use of Sector coupling technologies in the Czech Republic is given.

[pt] Atualmente, as termoelétricas abastecidas por Gás Natural (GN) são responsáveis por 11 porcento da geração de energia elétrica no Brasil, consumindo 40 porcento da demanda de gás do país. Esse consumo de GN é sazonal e inconstante, pois é utilizado como substituto para a energia hidrelétrica, que depende do nível pluviométrico dos locais onde estão suas usinas. Devido a essa peculiaridade da matriz energética brasileira e a dependência do país por gás importado gerou-se uma necessidade de estabelecer estoques flutuantes de Gás Natural, armazenados em estado liquefeito (GNL) em navios metaneiros. O principal objetivo desse estoque é que, na eventualidade da necessidade de despacho da geração das termoelétricas, o país tenha uma quantidade de gás suficiente para permitir uma produção de energia termoelétrica por 30 dias. Entretanto, esse modelo de estoque contingencial de GNL é ineficiente e tem custo muito elevado. Essa dissertação demonstra a viabilidade técnica e econômica da substituição dos estoques flutuantes de GNL em navios metaneiros pela utilização de espaços subterrâneos em cavernas abertas por dissolução de rocha salina em domos onshore, apresentando um dimensionamento anual do tamanho do estoque, ou quantidades de cavernas, para atender a crescente necessidade de estoque de GN ao longo do tempo. Como objetivo secundário, o trabalho apresenta uma análise da utilização desses estoques subterrâneos em ambiente offshore, como um pulmão contingencial para manutenção da produção de petróleo do pré-sal na eventualidade de uma ocorrência interromper o fluxo regular de escoamento do gás produzido nas plataformas. / [en] Currently, the power plants fueled by natural gas (NG) are responsible for 11 percent of the electric power generation in Brazil, consuming 40 percent of gas demand in the country. The gas consumption of power plants is seasonal and volatile, since it is directly related to the level of rainfall in locations where there are hydroelectric plants. Due to this peculiarity of the Brazilian energy matrix and the country s dependence on imported gas, there is a need to establish floating stocks of Liquefied Natural Gas (LNG) in LNG carriers. The main objective of this stock is that, if it is necessary to dispatch the generation of the power plants fueled by Natural Gas, the country has a sufficient stock of NG to allow the production of the thermoelectric generation during 30 days of operation. However, this model of contingency stock of Natural Gas is inefficient and has a very high cost. This dissertation demonstrates the technical and economic feasibility of replacing the floating LNG carriers stocks by the use of open underground caves by dissolving rock salt domes onshore, presenting a prediction of the annual stock size and the necessary quantity of caves to meet the growing need for NG stock over time. As a secondary objective, the dissertation presents an analysis of the use of these stocks in underground offshore environment, as a contingency lung for the maintenance of the pre-salt oil reservoirs production in the event of an occurrence that causes the interruption of the regular flow of the runoff from the gas produced in the platforms.

My thesis is engaged in business development of company Iveco Czech Republic, s.r.o. I would like to review current situation and then work up plan how to improve this situation.

The thesis is a technical solution for heating two apartment buildings. The project is designed in two versions. The first variant is source of heat boilers for pellets, in the second variant, the heat source heat pumps type of land / water. Part of this work is an experiment which deals with the measurement of floor heating.

This dissertation contains a comparison of the real possibilities for heating reconstruction and TUV reheating in three public buildings (located nearby one another) in Budišov township, with resulting recommendations of the best options for local operating conditions. The dissertation contains calculations of heating requirements for particular buildings, a generic theoretical part which summarizes basic data concerning long-term fuels (biomass and natural gas), proposals for technical solutions to heating sourcing concerning these fuels and its prospective distribution from a central boiler house, and its reciprocal comparison from the perspective of the economics of actual realization and operation, and from a perspective of fuel availability and ecology.

This Thesis deals with thermal control calculation of the existing John Thomson steam boilers burning heating mazut and subsequent thermal conversion to natural gas. The main parts of the calculation are as follows: stoichiometry, thermal balance, conversion of the combustion chamber and heating area.

The aim of this thesis is design a hotwater boiler for burning natural gas with an output of 60 MW. Boiler works with temperature difference 150 °C / 70 °C. For a given fuel is calculated stoichiometric calculation. The following is the calculation of the heat balance of the boiler including the determinativ of thermal efficiency. The fuel used, the required parameters of hot water and feed water temperature are designed individual convective surfaces and dimensions of the boiler. The boiler design includes drawings.