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Pevné částice emitované spalovacími motory
Uiberlay, Michal
In this work Fixed particles eviscerated by internal combustion engines are summarised and distributed machines, means of transport and other technical equipment using internal combustion engines for their work and movement. All occurring pollutants are listed in the exhalations of internal combustion engines. Their distribution, the impact on human health and their effects on nature, the influence of air and climate. Furthermore, control of the quantity of certain types of particles. The work includes history and development in reducing the production of pollutants by internal combustion engines and the anticipated future development and use of technical means for limiting the production of particulate matter.
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Ekonomické aspekty bionafty
Kristen, Alan
The bachelor thesis deals with the issue of the use of biofuels in combustion engines and their impact on the environment. The thesis discusses the legislative sphere concerning the use of biofuels, their regulation and obligations related to their use. The following chapters describe the types of biofuels that are used in the Czech Republic. Selected fuels, their production and utilization are detailed. The next part deals with the economic balance of biodiesel production, costs of its production and subsequent consumption. The results are compared with conventional diesel. At the end of the thesis, the advantages and disadvantages of the use of biodiesel in terms of use in motor vehicles, its production and environmental impact are discussed.
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Effect of electromagnetic compatibility on the operation of automotive LED drivers
Vinklerová, Viktorie ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
The diploma thesis deals with electromagnetic compatibility, its bonds, measuring devices and interference sensors. Furthermore, the thesis includes a discussion of nearfield probes, standards CISPR25 and TEM chamber methods. It describes two integrated circuits NCV78964 and NCV78514 LED drivers from onsemi and their modules. The aim of the work is to design the measurements, then to implement and evaluate them. Finally, to optimize the operating parameters of the drivers with respect to both EMC and driver functionality.
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Implementace biopotravin a lokálních potravin do společného stravování
MOUČKA, Petr
Various efforts to reduce greenhouse gas emissions are increasingly being seen around the world. Agriculture and the food sector contribute to greenhouse gas emissions, and therefore it is necessary to introduce measures aimed at their mitigation. Organic food and short supply chains are associated with lower environmen-tal impacts, and school canteens offer great scope for mitigating climate change just by implementing these measures. An often-mentioned problem is the higher financial costs of buying organic or locally produced food. This work shows that, in the case of choosing the right ingredients and involving the right logistics, the fi-nancial costs for one portion do not have to exceed 1.5 % of the price increase. The work also shows that the implementation of organic food is not necessarily as key to mitigating climate change as the implementation of local food. To apply these results to other cases, research focused on specific canteens and their possibilities for the supply of local food is necessary.
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Vyhodnocení emisí amoniaku z chovu drůbeže ve vybraném zemědělském podniku
HES, Adam
This bachelor's thesis focuses on the assessment of ammonia emissions from agricultural operations and their potential impact on the environment and human health. The aim of the work is to analyze the factors affecting ammonia emissions and propose possible measures to reduce them. To achieve this goal, measurements of ammonia emissions were carried out using specialized sensors located in different places of the farm. At the same time, information was collected on the procedures and technologies used in animal husbandry and fertilizer storage. The analyzes carried out showed that the main sources of ammonia emissions in the analyzed agricultural company MTD Ústrašice are the breeding of farm animals and the application of fertilizers to the fields. We identified factors such as the type and size of animal husbandry, storage methods, and fertilizer application techniques that affect ammonia emission rates. Based on our findings, we propose the implementation of measures aimed at reducing ammonia emissions, such as optimizing fertilizer storage technologies, modifying procedures and using alternative animal husbandry methods. These measures should contribute to the protection of the environment and human health in the given agricultural enterprise.
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NOx production and elimination
Boška, Michal ; Jecha, David (referee) ; Chlápek, Petr (advisor)
Bachelor’s thesis deal with production and elimination emission of nitrogen oxides their influence for animated and inanimate nature and their characteristic. Main part of thesis is theoretic analysis of creation mechanisms in combustion suits and description most widely used method of elimination nitrogen oxides. Part of thesis deal with problems concerning of nitrogen oxides at legislation at Czech Republic.
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Company Financing via Initial Public Offering
Kovář, Jakub ; Ptáček,, Roman (referee) ; Meluzín, Tomáš (advisor)
Subject of this thesis is initial public offering and it’s main goal is describing of obtaining external funds for company’s funding. In the first part of the thesis is description of basic structure of financial markets, especially stock markets. The term IPO and it’s advantages and disadvantages are described. The last part is focused on individual steps of IPO realization. This thesis is focused on evaluation of chosen company’s entry on stock market. Especially macro-economic presumptions for IPO, readiness of chosen company and choice of suitable market are evaluated.
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The Influence of Operating Parameters and Construction Parameters of the Process Burner on Stability and Combustion Processes Parameters
Skryja, Pavel ; Jegla, Zdeněk (referee) ; Odstrčil, Miloslav (referee) ; Stehlík, Petr (advisor)
The objectives of this paper focus upon composing recommendations with respect to burners design while observing aerodynamic, together with present and advanced developments in the field of flame technology principles. Specifically the aims are set at flame stability and pollutions. Important part of this paper is a novel design procedure dealing with premixed burners. Further, by exploiting the results of testing program enabled one to design burners exhibiting low level of nitrogen oxides emissions. On the basis of aerodynamic analysis of premixed burners flow path several recommendations on the geometry resulted in proposing two ejectors, which transport the combustion air. In the first ejector the fuel jet, generated by flow through a nozzle, draws the specified part of the combustion air, and then the mixture is a driving agent of the second ejector. The remaining part of combustion air flows first through the radial curved vanes, and second its tangential velocity component is augmented by axial vanes prior it enters mixing part of the second ejector. For the additional contribution to the rotating motion the inclined axial vanes built inside the nozzle of the second ejector are responsible. The resulting swirling number reaches the values up to 2.6. For the burner so arranged fire stability and low NOx emissions in the wide operating conditions can be expected. Within the frame of extensive testing program in the field of diffusion burners several modifications have been carried out such as setting of axial vanes which secure the swirling motion, changes of combustion air flows path, and modifications of secondary nozzles, these resulted in extending zone of stabilized flame and reducing the formation of NOx, e.g. NOx emissions of 70 ppm, prior the modifications, have dropped to 30 ppm (dry flue gas 3% O2). The main contribution of this paper stands in applications of development activities results in aerodynamic and flame within their implementation in the field of burners design. Further, it is the proposed design of burners which are capable of simultaneously firing products of the biomass microwave pyrolysis, namely syngas and bio-oils.
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