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Impact of Biomass Storing on Heating Value
Černý, Michal ; Špiláček, Michal (referee) ; Lisý, Martin (advisor)
The main aim of my bachelor´s work is the experimental verification of the landfill impact on the parameters biomass. The first part deals with definition, the formation of a basic biomass division. In the next section we find the issues concerning the burning, fuel composition and emissions during combustion. The last part deals with the influence of climatic conditions on the biomass degradation. In the experimental part were measured calorific calorimeter. The result was that, after a measured period of five months to avoid significant degradation of the fuel.
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Modification of a diesel generator for parallel operation with the grid
Černý, Martin ; Ctibor, Jiří (referee) ; Knobloch, Jan (advisor)
This works applies the idea of adjustment an engine-generator, so it is possible to connect an engine-generator, or other type of a generator, to the electricity. Consequently, the machine can transform the power supply without an outage. This work concerns the complex approach, provides the descriptions of particular parts, sensors and active components of a motor-generator and includes the explanation of their function. Further research is focused on designing and drawing a plan with a choice of a control unit for the whole system. Finally, the work deals with the complex implementation and testing the machine in real operation.
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Bio-based composites made from lactic acid resins
Smiřický, Jan ; Černý, Miroslav (referee) ; Figalla, Silvestr (advisor)
This bachelor thesis is about the synthesis of polyurethane glue, which is capable of gluing together sawdust, and about the testing of the mechanical characteristics of the glue and sawdust compostion. This glue is biodegradable and is created from renewable resources, this is why it could be an appropriate replacement for phenol formaldehyde, melamine, and urea formaldehyde resins. Another indisputable advantage is the absence of arenes in the macromolecule structure, which can be carcinogenic. In this synthesis, the compounds polylactic acid and hexamethylene diisocyanate were chosen, the former as the polyol and the latter as the isocyanate. In the theoretical section of the thesis, the used compounds are described in terms of their characteristics, their creation and the tests of the composites as well. In the experimental section, the conducted experiments are described.
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Methods for improving frictional features of rubbing surfaces
Fojtík, Jakub ; Černý, Michal (referee) ; Šamánek, Otakar (advisor)
This bachelor thesis describes several methods of improving surface's tribological properties. There are many forms of tribological processes, depending on structure, geometry, material properties, relative motion and loading of system elements. The main aim is to minimize wear and friction. It can be controlled by improving surface structure, geometry and by increasing of surface roughness with coating deposition methods, chemical-heat treatment and surface texturing. These methods can be also used for reparation of degraded rubbing surfaces or for surface modification in order to establish suitable lubrication conditions. An introduction to micro/nanotribology and tribological processes in micro/nanoscale is also described in this study.
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Design of electrical travel of reaper`s drive unit
Otoupalík, Jan ; Černý, Michal (referee) ; Koutný, Daniel (advisor)
This bachelor thesis focuses on the design of electrical travel for universal mowing machine, which will be controlled remotely. Designed travel has independent wheel drive, the maximum speed of 10 km per hour and can be used in the terrain with a slope of 30°. The thesis deals with the determination the parameters of the travel, design of the possible electrical drive units and design with respect to the stability of the device. Another part of the thesis deals with the design of the travel and describes particular parts of the travel.
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Design of the steam generator for modular reactor
Černý, Marian ; Baláš, Marek (referee) ; Šen, Hugo (advisor)
Subject of this thesis is design of the steam generator for modular reactor. The dissertation consist of the theoretical part, where are described heat-exchangers and steam generators used in nuclear power plants. Second part contains theoretical calculations in the first approach (thermal, hydraulic and strenght calculation). In the next part are particular variants of steam generator selected. For the final variant are necessary calculations (introduced above) and drawings of selected parts are done. In the final statement is technical solution evaluated, and the parameters of the steam generator are compared with actually used steam generators.
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Apartment house
Černý, Martin ; Hrochová, Žaneta (referee) ; Sedláková, Markéta (advisor)
The subject of the bachelor's thesis is the design of an apartment building in Humpolec. It is an apartment building, which has four floors above ground and one underground floor. On the first floor part of the house is designed for administration. The building is built on a slightly sloping terrain and is free-standing. Main entrance with entrance to the collective garage is situated to the southwest, where the existing access road is. Nine different housing units are designed. The construction system is made of ground ceramic blocks. The ceilings are made of prestressed panels and the roof is single skin. The work contains project documentation of the actual implementation.
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Mechanical pretanning in sewage works
Černý, Marian ; Grosman, Martin (referee) ; Němec, Zdeněk (advisor)
The bachelor thesis contains a literature search dealing with mechanical equipment of waste water treatment plants. After introduction of waste treatment there is stated some description of technical and construction search of particular equipment, system of their operating, analysis of their operation parameters and their using on waste water treatment plants in this bachelor thesis. There are described typical ordering of particular equipment in to technological lines on waste water treatment plants. The bachelor thesis contains description of self-cleaning screen, hand skimmed screen, mechanical coarse screen, mechanical fine screen, equipment for grit and sand removing, skimmed cylinder strainers, screw conveyors, screw presses for screenings with washing and integrated coarse pre-treatment. There are published some schemes, sketches, photos and tables of technical parameters above mentioned equipment in this bachelor thesis. The sketches of technical drawing character are treated in Autodesk ACAD 2005 program.
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Stand-up power wheelchair
Juříček, Václav ; Maňas, Pavel (referee) ; Černý, Michal (advisor)
This thesis deals with the structural design and manufacture of special power wheelchair prototype in collaboration with company Brano. Remarkable feature of this wheelchair is the ability to pull its user to an upright position, offering the greater independence, self-sufficiency and medically positive impact on physical functions. The content of this thesis is devoted to a search of the current state of knowledge in the matter, structural analysis of complete wheelchair assembly with a detailed description of each component including the important calculations and analyzes, as well as a description of the wheelchair testing. The conclusion presents summarization of all the results in structural, technological and economic terms.
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