National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
"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.
Boilers for solid fuel
Mozola, Ondrej ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
Main goal of this bachelor thesis is a research about a different kinds of low performance boilers used for heating in family houses. First part is dedicated to characteristics of solid fuels and advantages or disadvantages of their usage. The second part is focused on composition of solid fuels and their most important observed properties. The third part divides boilers using solid fuels into different categories. Last part consists of comparative calculation of financial costs needed on heating in selected family house with different boilers.
General ways for transformation aircraft jet engine to aeroderivative
Pokorný, Šimon ; Poláčik, Ján (referee) ; Škorpík, Jiří (advisor)
Purpose of these Bachelor thesis is to apprize the reader with the generals principles of transformation aircraft turbojet to aeroderivative. Part of the work are elementary functional principles and structural design of combustion turbine used for aircraft applications. They are connected to stationary power units designed to produce elektricity. The last chapter introduce separate transformation processes to change aircraft turbojet to aeroderivative.
House energy solutions using renewable energy sources
Sabo, Martin ; Vavříková, Petra (referee) ; Poláčik, Ján (advisor)
This bachelor thesis discusses the role of renewable sources of energy in energetics of a family house and technologies providing this possibility. Special care is given to power production, heating and air conditioning. The issue of low-energy and passive houses is described in the beginning of the thesis, leading to acknowledgement with different types of energy sources. Analytic part of the thesis contains general information about ways of heating and power production using renewable sources of energy. Different ways of ventilation are introduced and suitability of specific technologies assessed. The practical part describes design of ventilation and heating unit in an experimental house.
Gas Supply and Underground Gas Storages in Slovakia
Galbavý, Mário ; Poláčik, Ján (referee) ; Lisý, Martin (advisor)
The aim of this bachelor thesis is to describe the situation regarding the storage and supply of natural gas in Slovakia. Thesis is divided into 4 chapters. The first chapter deals with natural gas from a general point of view, from its properties to its possible use. The second part describes the situation of supplying Slovakia with natural gas. The third part deals with the ways of storing natural gas and individual underground reservoirs located in Slovakia. The final part describes the reasons for the storage of natural gas and the possibility of measures that can ensure the security of its supply.
Risks and Impacts of Black-out in Czech Republic
Tomášková, Kateřina ; Poláčik, Ján (referee) ; Lisý, Martin (advisor)
Electricity is an integral part of our daily life. Only a small problem in the power system and a small current outflow can cause us a lot of inconvenience, let alone a wider outflow of elektricity. The aim of this thesis is to define the risks of black-out for the Czech republic. Then perform resers of foreign experience with the black-out and on the base of these experiances, outline the possible impacts for the Czech republic, in case that this situation would occur once in our country.
Hydrogen technology as a clean energy solution
Pavliska, Vojtěch ; Šnajdárek, Ladislav (referee) ; Poláčik, Ján (advisor)
Gradual transition towards renewable sources of energy should be one of the main concerns of today’s society. This does not only concern the production of electricity but also automotive industry. Transportation is the main cause of air pollution in bigger cities and is also responsible for a solid percentage of green-house gases production. For these reasons, it is key to seek more sustainable and eco-friendly ways of motorized vehicles propulsion. Artificially produced hydrogen is one of the more promising alternatives to fossil fuels. This thesis describes the application of fuel cell technology for city busses. It presents some existing examples of hydrogen busses and their comparison with common means of mass transportation.
Thermal degradation of the wood with the application of fire retardants
Woffová, Helena ; Poláčik, Ján (referee) ; Šnajdárek, Ladislav (advisor)
This bachelor‘s thesis is applied on the area of wood burning and how retarders affect the process. The theoretical part is composed of research of chemical composition of wood and its processes that exist during wood burning. Also, impacts of these retarders on these processes have been analyzed as well as methods of the research. The experimental part contains applied termogravimetric analysis of chosen retardant and its evaluation.
Fine combustion particles produced from real burning of biomass
Pažourek, Josef ; Poláčik, Ján (referee) ; Pospíšil, Jiří (advisor)
This bachelor’s thesis deals with fine combustion particles produced from real burning of biomass. The first chapter is about biomass, combustion devices in which biomass can be combusted and last but not least polluting substances, which are created during the combustion. In experimental part the measuring equipment that measures fine particles is presented. After that the results from measurement are evaluated.
Energy use of biomass
Streďanská, Alexandra ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
This bachelor thesis concerns on energy utilization of biomass. The main objective is to compare the combustion process of agropellets and wood pellets. This matter may be divided into two main parts. The first part focuses on research. It discusses the division of biomass and its properties. The second part is fully experimental. It focuses on experimenting with boiler efficiency calculations and describes these experiments. It also addresses the differences in combustion of given kinds of fuels and the subsequent evaluation of the measured results.

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