National Repository of Grey Literature 74 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Black Coal Mining in Czech Rep
Vínovský, Jan ; Škorpík, Jiří (referee) ; Lisý, Martin (advisor)
Throughout history, coal mining has dominated the 19th and especially the 20th century. The period of decline in mining began in the 90s. Between 1990 and 2019, there was a decrease of 88.13%, specifically from 30,714 kt to 3,645 kt of mined coal per year. Currently, only four active mines are in operation and the other two are in a conservation state. The forecast for the future of the sector is very unfavorable. In addition to the economic crisis, there are also reserves of extractable coal, which are currently around 25,000 kt. It is currently planned to end mining at the ČSA and Darkov mines at the turn of 2020 and 2021, ČSM Mines should be closed by 2022 at the latest, which will completely end black coal mining in the Moravian-Silesian Region and the entire Czech Republic.
Analysis of the use of Stirling engines in power engineering
Podolák, Petr ; Toman, Filip (referee) ; Škorpík, Jiří (advisor)
This bachelor thesis is designed to acquaint reader with Stirling engines and their applications. The main aim of the first part is general overview. The purpose of the second part is to present current usage as well as ongoing research projects. It the third part the ecological and economical impacts of Stirling engines are discussed.
Characteristic properties of axial stages of working machines
Hejduk, Michal ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
This bachelor work is dealing with conclusion of basic characteristic of axial stages working machines. First part of this thesis presents the characteristics of principle behind every turbomachinery therefore not only the working machine but turbine as well. In the end of the first part the basic equations, which may be needed in the construction of such machines. Second part focuses on characteristic features, which are the same or very similar throughout axial turbomachinery. The last part of this thesis works with usage of different work machines in the industry. It is also mentioned here why are the axial turbomachinery work machines used instead of radial or tangential work machines
Methods of CO2 separation from air, ways of its use and long-term storage
Kober, Ondřej ; Baláš, Marek (referee) ; Škorpík, Jiří (advisor)
Combustion of fossil fuels creates greenhouse gas emissions that cause global warming. The most important of these gases is carbon dioxide. Although it occurs naturally in the atmosphere, human emissions upset the balance of various natural processes. The aim of this bachelor’s thesis is to conduct a background research in the field of carbon dioxide capture, storage and utilization. The thesis also describes the role of carbon dioxide in the atmosphere, its cycle and human influence on carbon dioxide concentration.
Assessment of CCS and CCU methods
Kroupa, Zdeněk ; Škorpík, Jiří (referee) ; Baláš, Marek (advisor)
The thesis focuses on CCS and CCU technologies, which could find application in industry and other sectors in the future. These technologies are used to reduce CO2 emissions, mainly from point sources. This thesis provides a comprehensive overview and division of CCS and CCU technologies and points out negative effects of its installation. Part of the work is also a comparison of individual steps of technology, both from an energetic and financial point of view. The aim is to show a wide range of influences on the final price and a significant discrepancy in the results of some scientific works. At the same time, in some parts, you can find a detailed description of individual parts of the technology.
Design of turbocharger
Streďanská, Alexandra ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
Diploma thesis focus on the design of turbocharger in SW MS Excel. For required flow and pressure ratio, the thermodynamics parameters were calculated for the turbocharger. From these, geometry was designed and the condition of mediums was calculated for each part of the turbine and compressor. At last basic characteristics of the turbine and compressor on varying the regime of engine operation the rotation was made and offered an idea about the working point position.
Wind machines for urban areas
Linda, Jakub ; Pospíšil, Jiří (referee) ; Škorpík, Jiří (advisor)
The submitted diploma thesis deals with wind machines in densely populated areas. The aim of the work is to design a appropriate wind machine for use on the roofs of buildings, including all the specifics that the air flow in the city may contain. At the beginning, the work focuses on the production of electricity in cities in general, which results in an ideal system of obtaining energy for households. Furthermore, the work deals with the wind in general, where all its specifics are taken over. A very important part of the work is the study of the specifics of air flow in the urban environment together with the numerical simulation of this flow, which results in certain regularities of the location of wind machines on the roofs of buildings. The work then passes to a search of used wind machines, from which the most suitable candidate for use in cities is subsequently selected. The last part of the work is the design of the machine itself for a specific location. In this chapter, the design wind speed is determined from the measured data, which is later followed by the calculation of the geometry of the blades, and finally its benefits and advantages are determined from the properties of the wind machine
Heat exchanger parametric study using CFD
Sušovský, Martin ; Škorpík, Jiří (referee) ; Špiláček, Michal (advisor)
In this paper is carried out basic design and calculation of tube heat exchanger with a straight tube bundle with installed systém of disk and doughnut baffles. The calculation included pressure losses and heat transfer coefficient of tubular space and shell side. Then CFD model was made for parametric study, which was focused on influence of change of the baffles geometry on the heat output of the exchanger and the pressure loses on the shell side.
Construction of small steam engine for the use of solar energy
Strava, Jan ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
Possible modern application of piston steam engine is electricity production using steam made by solar energy. This diploma thesis focuses on designing such piston steam engine Described solution would be effective as an off grid electricity generator, because alternative source of steam could be added for occasions, when sunlight is not powerfull enough for steam production.
Design of aeroderivative for use in compression stations
Dominik, Dávid ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
This thesis is concerned with the calculation of the power turbine. This turbine should be used in the automatic drive of the compressor used for compression of natural gas in compressor stations. Flight engine aeroderivate from the Rolls-Roye company, type RB211-22B, was used as gas generator. The main aim of the thesis is to summarize of the base atributes of the combustion turbines and aeroderivates. They are used for automatic engine, application a thermodynamic calculation of the power turbine, for reaction stage and basic strength calculations.

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