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Solid fuel boilers
Krolák, Michal ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
The main goal of thesis is to make a recherche about solid fuel boilers. First part of thesis describes solid fuels and their properties. Second part is engaged on division of boilers used in homes. This part also expose fundamentals of fuel burning. Last part of thesis is dedicated to economical account of selected boilers.
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Effective Heating Systems for Family Houses
Čulík, Martin ; Poláčik, Ján (referee) ; Lisý, Martin (advisor)
This bachelor’s thesis deals with a summary of basic information and possibilities of heating family houses. Designing the right type of heating system is really important factor for a good operation of heating and also for the right comfort inside of the house. There will be description and calculations of the specific house in the second part of the thesis.
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Hydrogen production
Poláčik, Ján ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The thesis deals with water electrolysis focusing in particular on pulse electrolysis. The theoretical part characterizes hydrogen and its properties as well as the ways of its use and storage. It also analysis various methods of hydrogen generation. It examines in details water electrolysis and its energetic and chemical balance. There is also an evaluation of water electrolysis efficiency and its improvement followed by pulse electrolysis description. Laboratory equipment for direct current and pulsed direct current hydrogen production are suggested. Theoretical expectations are tested experimentally. Finally the thesis presents the results of measurements, compares and summarizes the data. It points out the contribution of this type of electrolysis with its effectiveness. It proposes uses of electrolysis and the subsequent research.
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Nanosafety and the Current Trends in the Risk Assessment of Nanoparticles
Valovič, Stela ; Poláčik, Ján (referee) ; Adamec, Vladimír (advisor)
This diploma thesis deals with the current state of nanosafety. The aim of this paper was to review and critically analyze approaches to facilitate the risk assassment of nanomaterials. In the first part it provides an overview of the most important methods and software tools that are used in this field. Methods were analyzed against a set of relevant criteria. Criteria include consideration of exposure, life cycle and physicochemical properties, transparency, applicability and the field of application. Different criteria were chosen for the software tools. Based on results, a new approach was suggested. The approach takes the form of a diagram based on questions. The purpose of the suggested approach is to recommend the most relevant method, tool or their combination to assess the safety of a nanomaterial depending on known characteristics. The approach was also implemented in a software tool.
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Off-grid system and container housing
Filka, Tomáš ; Kracík, Petr (referee) ; Poláčik, Ján (advisor)
This thesis sums up current possibilities of using renewable energy sources and addi-tional technologies which can be suitable for off-grid systems. Specifically, it describes the possibility of their application to the increasingly common container structures. The first part of this work contains information about history and present trends in the area of renewable energy sources and container housing. The second part shows a concept of such house, completely disconnected from the public grid. The results of this study allow basic insight into the problem and illustrate the practical application of acquired knowledge.
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Proposal the heating system of the house
Zouhar, Adam ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
This bachelor thesis is dealing with proposals for the heating of the model house and about assessment of investments to these solutions. First, research of heating systems has been done, then the model house has been described. After that heat loss of this building and the energy needs for heating and preparing hot water have been calculated. At the end, some solutions of the heating system have been proposed. The financial comparison of these solutions has been done in the last chapter of the thesis.
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"Power-to-Gas" Energy Storage Technology
Gálíček, Radomír ; Špiláček, Michal (referee) ; Poláčik, Ján (advisor)
Climate change is becoming a severe global issue which demands innovative technical solutions. If, in the context of reduction of gaseous carbon emissions, the share of renewable energy resources continued to rise, the need for energy storage would emerge. That could mean a shift towards hydrogen focused technologies. This bachelor’s thesis focuses on Power to gas processes and summarizes means of hydrogen production, storage and transportation. All the mentioned aspects are reviewed from technological and economical point of view. Conventional methods of hydrogen production from fossil fuels are the most common, but usage of electrolysis or biological methods may prove as competitive options in near future. Furthermore, the usage of fuel cells in the field of small-scale cogeneration units is recently going through a phase of dynamic development. The practical part of this thesis focuses on designing a seasonal Power to gas unit for a semi-detached house which is powered exclusively by renewable resources. From numerous variants the best one was chosen and compared to a conventional energy storage using lithium batteries. It is shown that even thou the electrochemical cells are more flexible variant they couldn’t match Power to gas technology in the term of seasonal energy storage.
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Energy supply for greenhouse production
Najbrtová, Zuzana ; Poláčik, Ján (referee) ; Pospíšil, Jiří (advisor)
The import of the vegetable has prevailed in the long run over the own production. In connection with this reality and increasing demand for the food with higher quality the production greenhouse is more often built. The providing heat, cold and electricity for the year-round operation is related to the construction and working of these objects. The theoretical part of this theses describes possible ways how to cover energy consumption for the model greenhouse in Kožichovice, Třebíč region. The heat losses and the year-round heat consumption were stated for the selected model and compared with the exact values from Kožichovice. The following method of energy supply was selected based on the calculated energy consumption - the separate cogeneration unit, cooperation of several cogeneration units, a biogas station, a heat pump and central heating system. These methods of energy supply were subjected to technical and economical comparison.
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Heat loss of buildings and proposals for measures to eliminate them
Nguyen Khac, Hoang ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
The bachelor thesis deals with calculations of heat loss in buildings and proposals of meas-urements. Thesis is divided into 5 chapters. In the first one there are reasons to insulate buildings, the process of material selection and furthermore there are descriptions of each materials used as insulation materials. In the second chapter there is the description of the model house, which is analysed in the thesis. The third one is about the calculation proce-dure. In the fourth chapter there is the proposal of reconstruction and in the last, fifth chapter there is an evaluation of reconstruction from financial standpoint.
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