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Thermal degradation of alternative electrical insulating liquids
Vodička, Tomáš ; Kazelle, Jiří (referee) ; Frk, Martin (advisor)
This thesis deals with alternative thermal degradation of electrical insulating liquids. The theoretical part describes the current state of the problem, electrical insulating liquids, their classification and types. There are described properties of electrical insulating liquids, their models of aging and diagnostic methods in accordance with the appropriate standards. In the practical part are chosen by representatives of alternative electrical insulating liquids and there are determined their dielectric characteristics in the initial state. According to the measured values is chosen five candidates for which it is designed and implemented an accelerated degradation test. During the test are measured dielectric parameters of the selected oils. Measured dependencies are mathematically approximated. In conclusion, the results are compared and physically interpreted in view of oxidation stability.
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Study of rheological properties of alternative electro insulating fluids
Botlová, Simona ; Jirák, Josef (referee) ; Frk, Martin (advisor)
This master thesis deals with clasification of electrical insulating liquids and analysis their reological properties. Theoretical part describes viscosity and possibilities of its measurement, electrical and non-electricl properties of electrical insulating liquids and themselves electrical insulating liquids. Practical part describes measurement of viscosity and density of chosen vegetable oils, their components and transformer oils in wide temperature range. At the conclusion of the thesis, analysis of measurement results is done.
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Study of alternative electroinsulating liquids properties
Bannert, Tomáš ; Hylský, Josef (referee) ; Frk, Martin (advisor)
This bachelor´s thesis is dealing with the study of alternative electrical insulating properties of the materials used in the electronics industry, particularly liquids based on natural esters and especially their constituents in the form of higher fatty acids and esters. The work is divided into theoretical and practical part. The theoretical part deals with the characterization of vegetable oils, their constituents and mineral oils, their comparison in terms of electrical and non-electrical properties and current state of the use of vegetable oils and their constituents in the electronics industry. Further it’s dealing with analysis of diagnostic methods for these characteristics. In the experimental part were analyzed electrical and non-electrical properties of selected samples of vegetable oils, their constituents and mineral oils such as the density, the dynamic viscosity and the complex permittivity and its parts as relative permittivity and loss number. Evaluations of the results of each group are compared with each other.
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Study of rheological properties of alternative electro insulating fluids
Botlová, Simona ; Jirák, Josef (referee) ; Frk, Martin (advisor)
This master thesis deals with clasification of electrical insulating liquids and analysis their reological properties. Theoretical part describes viscosity and possibilities of its measurement, electrical and non-electricl properties of electrical insulating liquids and themselves electrical insulating liquids. Practical part describes measurement of viscosity and density of chosen vegetable oils, their components and transformer oils in wide temperature range. At the conclusion of the thesis, analysis of measurement results is done.
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Study of alternative electroinsulating liquids properties
Bannert, Tomáš ; Hylský, Josef (referee) ; Frk, Martin (advisor)
This bachelor´s thesis is dealing with the study of alternative electrical insulating properties of the materials used in the electronics industry, particularly liquids based on natural esters and especially their constituents in the form of higher fatty acids and esters. The work is divided into theoretical and practical part. The theoretical part deals with the characterization of vegetable oils, their constituents and mineral oils, their comparison in terms of electrical and non-electrical properties and current state of the use of vegetable oils and their constituents in the electronics industry. Further it’s dealing with analysis of diagnostic methods for these characteristics. In the experimental part were analyzed electrical and non-electrical properties of selected samples of vegetable oils, their constituents and mineral oils such as the density, the dynamic viscosity and the complex permittivity and its parts as relative permittivity and loss number. Evaluations of the results of each group are compared with each other.
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Thermal degradation of alternative electrical insulating liquids
Vodička, Tomáš ; Kazelle, Jiří (referee) ; Frk, Martin (advisor)
This thesis deals with alternative thermal degradation of electrical insulating liquids. The theoretical part describes the current state of the problem, electrical insulating liquids, their classification and types. There are described properties of electrical insulating liquids, their models of aging and diagnostic methods in accordance with the appropriate standards. In the practical part are chosen by representatives of alternative electrical insulating liquids and there are determined their dielectric characteristics in the initial state. According to the measured values is chosen five candidates for which it is designed and implemented an accelerated degradation test. During the test are measured dielectric parameters of the selected oils. Measured dependencies are mathematically approximated. In conclusion, the results are compared and physically interpreted in view of oxidation stability.
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Mineral oil tax policy in the EU
Miklová, Lenka ; Kubátová, Květa (advisor) ; Hartlová, Alena (referee)
This thesis summarizes the findings of the current application of mineral oil taxation policy in the European Union and individual Member States. Attitude and editing this field from the perspective of the European Union is engaged in a chapter called harmonization of taxes on mineral oils in the EU. Comparative analysis of tax revenues from mineral oils in the EU is the second chapter in which I deal with the taxation of mineral oils in the Member States and their tax revenues from energy taxes, which include revenues from mineral oil. Next chapter competition duties on mineral oils focuses on the development of tax rates on mineral oils, the mobility of the tax base and the related variability in rates over time and between countries. The content of the last chapter named Evolution taxation of mineral oils from the perspective of the European Union, the EU primarily intended changes in the taxation of energy products.
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Analysis of rules of marking mineral oils applied in the Czech Republic and selected member countries of the European Union
Miklová, Lenka ; Svátková, Slavomíra (advisor) ; Eisenwort, Lukáš (referee)
The presented bachelor paper summarizes the findings on the rules of marking mineral oils applied in the Czech Republic and selected member countries of the European Union. The question "How has the marking developed in the Czech Republic and why it is important to mark mineral oils?" is answered in the chapter entitled "Rules of marking mineral oils in the legislation of the Czech Republic." Position of the European Union to the marking of mineral oils is formulated in the Directive, which is also interpreted in the text. The next part of the work explains rules on labeling in the 18 EU Member States. Comparison of these rules and then finding the same elements and differences in markings in individual countries is described in the last chapter.
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