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Assesment of the Environmental Impact in the Design of Production Machines in Terms of Greenhouse Gas Emissions of Selected
Krbalová, Maria ; Pačaiová,, Hana (referee) ; Demeč, Peter (referee) ; Blecha, Petr (advisor)
The presented doctoral thesis is focused on environmental impact assessment of basic engineering materials used in a production machine construction. Ecological profile of the machine itself develops already in the phase of its design. It is not only about the choice of future machine parameters and materials that it is built from, but also about technologies used for its manufacture and operation conditions of the finished machine (consumption of energy and service fluids). The thesis occupies in detail with environmental impact analysis of the production machine design from the viewpoint of material production that mentioned machine consists of. The output from the performed analysis is methodology for evaluating of machine design from the viewpoint of greenhouse gas emissions. Created methodology enables evaluating of machine ecological profile and its possible adjustments even during pre-production stage. In the first part of the thesis the analysis of current legislation in the field of fighting against climate changes, reducing of products energy consumption and increasing of production machines energy efficiency is presented. Also in this part of the thesis description of methods that were used to achieve thesis goals is stated. Furthermore analysis of production machine as a system of structural components that fulfil the certain functions and description of used basic engineering materials are presented. The second part of the thesis is devoted to environmental impact analysis of the production machine design process. There the design process and environmental impact of machine design are described. This is followed by description of production machine life cycle and detailed analysis of undesirable substances emissions emitted during pre-production phases of machine life cycle (i.e. during the raw materials extraction and materials production). From this analysis the particular constituents’ pre-production phases which are sources of undesirable substances emissions (e.g. greenhouse gas emissions) were derived. The thesis also includes analysis of these constituents’ life cycles and description of electric power generation as a basic constituent of any phase of product life cycle. In this part of the thesis calculations of particular fuel type’s amounts that is required to produce 1 MWh of electric power and carbon dioxide amount produced during electric power generation are presented. The third part of the thesis contains created models of manufacturing processes of basic engineering materials and calculations of related emissions of selected greenhouse gases. The practical output from this part of the thesis is methodology that enables environmental impact assessment of machine design from the viewpoint of engineering materials used in its construction.
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Assesment of the Environmental Impact in the Design of Production Machines in Terms of Greenhouse Gas Emissions of Selected
Krbalová, Maria ; Blecha, Petr (advisor)
The presented doctoral thesis is focused on environmental impact assessment of basic engineering materials used in a production machine construction. Ecological profile of the machine itself develops already in the phase of its design. It is not only about the choice of future machine parameters and materials that it is built from, but also about technologies used for its manufacture and operation conditions of the finished machine (consumption of energy and service fluids). The thesis occupies in detail with environmental impact analysis of the production machine design from the viewpoint of material production that mentioned machine consists of. The output from the performed analysis is methodology for evaluating of machine design from the viewpoint of greenhouse gas emissions. Created methodology enables evaluating of machine ecological profile and its possible adjustments even during pre-production stage. In the first part of the thesis the analysis of current legislation in the field of fighting against climate changes, reducing of products energy consumption and increasing of production machines energy efficiency is presented. Also in this part of the thesis description of methods that were used to achieve thesis goals is stated. Furthermore analysis of production machine as a system of structural components that fulfil the certain functions and description of used basic engineering materials are presented. The second part of the thesis is devoted to environmental impact analysis of the production machine design process. There the design process and environmental impact of machine design are described. This is followed by description of production machine life cycle and detailed analysis of undesirable substances emissions emitted during pre-production phases of machine life cycle (i.e. during the raw materials extraction and materials production). From this analysis the particular constituents’ pre-production phases which are sources of undesirable substances emissions (e.g. greenhouse gas emissions) were derived. The thesis also includes analysis of these constituents’ life cycles and description of electric power generation as a basic constituent of any phase of product life cycle. In this part of the thesis calculations of particular fuel type’s amounts that is required to produce 1 MWh of electric power and carbon dioxide amount produced during electric power generation are presented. The third part of the thesis contains created models of manufacturing processes of basic engineering materials and calculations of related emissions of selected greenhouse gases. The practical output from this part of the thesis is methodology that enables environmental impact assessment of machine design from the viewpoint of engineering materials used in its construction.
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Measurement of greenhouse gas concentrations
Dohnal, Jan ; Novák, Vítězslav (referee) ; Bača, Petr (advisor)
This semester thesis deals with the greenhouse effect, various gases and methods of measurement. On the greenhouse effect is viewed from its historical dating, despite changes in atmospheric composition and reactions of individual institutions. It contains a theoretical analysis of the individual gases. It focuses on the most harmful greenhouse gases such as water vapor, carbon dioxide, nitrous oxide, methane, ozone, chlorofluorocarbons and halons. Analysis methods for detection of gaseous substances. Part of this work is focus on the detection of nitrogen dioxide and chloro-fluorocarbon. The data is processed using a microcontroller and then sent to an Internet server thingspeak.com. If the device proves successful, will be used as a laboratory exercise in the course Ecology in electronics.
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The use of alternative fuels in the Air Transport
Dvorský, David ; Šplíchal, Miroslav (referee) ; Nastálek, Ondřej (advisor)
The objectives of this thesis is an overview of the available aviation fuel and possible alternatives. Evaluation of the applicability of alternative fuels in aviation. Furthermore, to assess the overall readiness of each technology across the aviation, from general aviation through public air transportation to transport helicopters. Evaluate the economic situation in each sector and determine the best alternative fuel option.
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Summer fluxes of nitrous oxide from boreal forest
Macháčová, Kateřina ; Pihlatie, M. ; Halmeenmäki, E. ; Pavelka, Marian ; Dušek, Jiří ; Bäck, J. ; Urban, Otmar
Boreal forests cover almost one-third of the global forest area, and results of soil measurements show them to be a natural source of the important greenhouse gas nitrous oxide (N2O). Nevertheless, N2O fluxes from boreal tree species have been excluded from calculations of N2O exchanges from forest ecosystems. Therefore, our objective was to quantify and scale up the N2O fluxes from stems of mature silver birch (Betula pendula), Scots pine (Pinus sylvestris), and Norway spruce (Picea abies), as well as from the forest floor of a boreal forest in Finland during June and July 2014. This study shows that boreal tree species emit N2O from their stems under natural field conditions and significantly contribute up to 8% of forest floor fluxes of N2O. Spruce trees seem to be the strongest N2O emitter among the studied tree species. Moreover, the N2O flux rates from both coniferous tree species increased with decreasing soil water content. This study highlights the necessity to include N2O fluxes from trees within the total greenhouse gas budget of forest ecosystems.
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Measurement and evaluation of exhaust gas production in the selected operation with cattle and their reduction.
ŠINDELÁŘ, Jan
This thesis deals with the problem of the environmental pollution by greenhouse gases and ammonia from agricultural livestock. Globally, agriculture is considered the largest producer of ammonia. Custom work is focused on measuring and determining the concentration of gaseous emissions of ammonia, nitrous oxide, carbon dioxide, methane and water vapor. The measurement was carried out in the barn with the breed Czech magpie in a collective farm FARMA JAVOŘICE Jihlávka s.r.o. For the measurement of exhaust gas was used device company INNOVA to 1412. The final section provides suggestions for reducing gas emissions.
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The effect of management type on greenhouse gas emissions from grasslands
HAJŠMANOVÁ, Klára
This work represents the grant application for project dealing with the influence of the type of management and fertilization on greenhouse gas emissions of (CO2, CH4, N2O) from grasslands, namely grazed pastures, mown and mulched meadows at an organic farm Borová near České Budějovice. This project evaluates the diurnal gas flux dynamics affected by application of different nitrogen fertilizers (i.e. NH4+, NO3- and manure).
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Measurement and evaluation of exhaust gas production in selected pig operation and design to reduce them.
PRAŽÁK, Jakub
Limitation of emission ammonia and greenhouse gases is a main assumption in the present time for modification the relation between agriculture and environment. The agriculture influences significantly environment only from point of view of landscape creation but mainly in the three fields, i.e. air, water and soil. Agricultureactivity effects considerably all the three fields and particularly intensive breeding of livestock by it?s by ? products i.e. organic remainders and gaseous emissions also have negative impact onto environment. Agriculture produces up to 90 % of worldwide ammonia products. In European measure the amount of ammonia leakage has to be reduced. One of the perspective technologies is exploitation biotechnological products to moderate exhalation of ammonia and greenhouse gases in surrounding stable, on dump and at the application farmyard manure and slurry.
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Emission load during growing of selected crops
MRÁČKOVÁ, Jana
The thesis focuses on partial assessment of the life cycle of the strawberry plant (Fragaria), the breeding of which has a long tradition in the Czech Republic. The breeding technologies in conventional and ecological farming systems are compared, in relation to the greenhouse gases emission. The data from agriculture and transportation were accumulated by way of questionnaire survey and expert literature.The objective of this thesis was to assess the impact of individual agrotechnical factors on the pollution of the environment with greenhouse gases emissions in conventional and ecological farming systems, and also to test the hypothesis on whether it is better, from the environmental point of view, to consume locally produced or imported strawberries.The environmental impact was calculated with the SIMAPro software. This tool uses the Ecoinvent databases and enables to create a model of life cycle of the product in question according to the ČSN EN ISO 14040 and ČSN EN ISO 14044 standards. Theinputs and outputs were related to the unit of one hectare and the resulting value was converted as per 1 kg of strawberries. The input included technological operations, amount of fertilisers, and plant protection products; the output of the analysis was the emission load per1 kg of strawberries expressed in the CO2 equivalent.
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