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Analysis of varnish composites properties in the course of moisture
Novák, Petr ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
The presented bachelor´s work deals with preparation of micronized mica filled varnish sauples. At the same time the temperature and relative humidity influence on the electrical properties of composite material by dielectric relaxation spectroscopy method are monitoring. The composite material consists of epoxide varnish TSA 220S, which is modified with different mass percentage of micronized mica. The results of this project are frequency dependencies of real and imaginary parts of complex permitivity with the environmental temperatures and humidities parameters of varnish components.
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Analysis of multistress ageing on dielectric spectras of materials
Kučera, Miroslav ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Diploma thesis treat of effect of thermal, electrical and combined (thermal electrical) stress on electrical characteristics of insulation material ISONOM NMN which is used as a slot insulation in electric motors. To monitor the stress is used the method of dielectric relaxation spectroscopy. Under examinations are the resultant dielectric spectra which constitute the frequency dependencies of components of complex permitivity. Compared are the effects of particular stresses on dielectric spectra of surveyed insulative material.
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Kinetics of the continual measurement of the actual fine particulates moisture content.
Mayerová, Kateřina ; Ing.Lukáš Brzobohatý (referee) ; Svěrák, Tomáš (advisor)
This thesis deals with the continual measurement of the hydrated lime moisture content on the principle of spectral measurements. The theoretical part describes the basic principles of the infrared spectroscopy, Fourier transformation and near infrared spectroscopy, which are used in the process of the spectroscopy measurement of fine particulates moisture content. The practical part of the work describes experiments and the evaluation of moisture hydrated lime measuring results, using gravimetric method and NIR spectroscopy in both the laboratory conditions and the conditions of operation production of hydrated lime as well. The part of the work monitors the spectroscopy measurement moisture values as the dependence on the optical quality of hydrate limes and the process conditions of the measurements.
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Biomass preparation and combustion technologies
Venhoda, Tomáš ; Kropáč, Jiří (referee) ; Juřena, Tomáš (advisor)
The aim of this work is to provide for background research about preparation and combustion of biomass. Technologies for preparation of biomass including ingathering prior to combustion are described in the first part of this work. Different ways combustion of biomass and comparison of different types of grates are in the second part of the thesis.
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Monitoring of the wheat quality for food production
Slavíčková, Radka ; Hýsková, Eva (referee) ; Omelková, Jiřina (advisor)
The aim of this study was to monitor the quality of wheat Triticum aestivum, imported into the laboratory MORAGRO after harvest by eight different suppliers, and to evaluate the main quality parameters decisive for the final use of cereal crops. The introduction of the theoretical part was devoted to understanding commercial and agricultural importance of wheat and description of morphological and physiological characteristics of wheat grain. The core of the theoretical part has been focused on the description and explanation of physical and chemical properties of the wheat grain, which largely affect the final product quality of wheat. External factors affecting final quality and yields of wheat were also commented. The experimental part was based on measurements of main quality parameters of wheat (moisture content, bulk density, falling number, amount of gluten and the wheat proteins, sedimentation value and content of additives and impurities). In most cases, measurements were carried out using automated instruments. The quality of wheat was determined based on the obtained results, which allows deciding, whether it is appropriating for food production.
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Continual actual moisture of fine particulates measurement possibilities.
Mayerová, Kateřina ; Ing.Lukáš Brzobohatý (referee) ; Svěrák, Tomáš (advisor)
This thesis describes the process of measuring a hydrated lime moisture, using gravimetric method and FT-NIR spectroscopy. The aim of the theretical part was to analyse and present the area of infrared spectroscopy (IR), gathering the general information about infrared spectroscopy, Fourier transformation and near infrared spectroscopy (NIR). Experimental part of the thesis was carried out in limekiln Carmeuse in Mokré town, where the FT-NIR spectroscopy was investigated for possible usage in on-line measuring of hydrated lime moisture.
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Diagnostic analyzes of an existing family house
Novotný, Jaroslav ; Láník, Jaromír (referee) ; Schmid, Pavel (advisor)
The thesis is mainly a structural engineering investigation of an old family house in Mladecko, Opava district. The whole object was measured, documented and examined; and after finding a series of defects, the aim of the theoretical part became to describe problematics of humidity and moisture in buildings. Moreover, because of the absence of previous documentation, there was a reason to carry out a brief historical study of the evolvement of rustic buildings, that became the second part of the theoretical work.
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