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Reviews of defects and failures of existing object
Kinclová, Anežka ; Daněk, Petr (referee) ; Schmid, Pavel (advisor)
The thesis is a structural engineering investigation of a family house in Omice, Brno – venkov district. The whole object was measured, documented, examined. After finding a series of defects, the aim of the theoretical part became to describe problematic of humidity and moisture in buildings and rehabilitation of moisture masonry.
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MOISTENING OF COMPONENT MATERIALS AND SPEED OF DEHUMIDIFICATION
Pospíšil, Tomáš ; Tomáš, Bžoněk (referee) ; Starý, Jiří (advisor)
This bachelor thesis deals with process associated with moisture in electrotechnics. The bachelor thesis is focused on the components and basic materials that are sensitive to moisture and defects caused by moisture in the reflow soldering process. The theoretical part describes the principles of measuring humidity and sorts of absorption. Furthermore this work described the basic classification and defects in components, base materials and packaging material sensitive to moisture and selection of standards dealing with this issue. Another theoretical part is focused on the manipulation with components and materials sensitive to moisture. The practical part deals with the methodology and practical measurement of moisture soaking in the components and materials with respect to their level of sensitivity to moisture. The following part is focused on the methodology of drying, practical measurement of drying and comparing two drying cabinets.
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The content of basic analytical constituents in selected raw meat
URBAN, Martin
This work is focused on the pork meat analysis. The moisture, fat, protein, collagen parts content in pork ham, shoulder and loin were measured with the NIR-method using. The samples from Masokombinát Plzen presented a high moisture content in comparison with the lower fat content. In the opposite the samples from Slaughterhouse contains a higher level of fat and less water. The pork ham purchased from the Slaughterhouse Lisov comprised 66.20 %, respectively 71.65 %, respectively 72.99 % moisture. Pork ham from the manufacturer Masokombinát Plzen contained 74.28 %, respectively, 75.18 %, respectively, 73.84 % moisture. The fat content of pork ham from manufacturer Slaughterhouse Lisov was measured 12.27 %, respectively, 4.55 %, respectively. 3.96 %. Pork ham from the manufacturer Masokombinát Plzen contained 1.76 %, respectively, 2.06 %, respectively, 3.01 % fat. The highest humidity of 75.29 % was measured at the pork shoulder by Masokombinát Plzen. At least moisture contained pork ham purchased from the manufacturer Slaughterhouse Lisov (66.2 %). Analysis revealed a high fat content of 12.03 % by the pork shoulders manufacturer Slaughterhouse Lisov. At least 1.76 % fat contained pork ham producer Masokombinát Plzen. Content of protein was the highest in pork ham by Slaughterhouse Lisov 24.13 %. Content of only 18.34 % of the protein was measured at the pork shoulder by Libor Novak. Most parts of the collagen contained pork loin from Slaughterhouse Lisov 1.78 %. Content of 0.4 % collagen parts were the lowest measured value. The highest moisture content (75.29 %) was measured at the pork shoulder producer Masokombinát Plzen, at least contained a pork ham from Slaughterhouse Lisov (66.2 %), the highest fat content (12.03 %) was observed in the pork shoulder from the manufacturer Slaughterhouse Lisov, the least fat (1.76 %) contained pork ham from Masokombinát Plzen. The richest content of proteins was in pork ham producer Slaughterhouse Lisov (24.13 %), only 18.34 % of the protein was measured at the pork shoulder of the company Libor Novak. The most of the collagen contained in sample from pork loin from Slaughterhouse Lisov (1.78 %) and the lowest in pork leg (0.32 %) from the manufacturer Masokombinát Plzen.
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Determination of moisture content in electrical insulating materials
Šebesta, Petr ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work is based on determination of moisture content in electrical insulating materials materials and ways to measure the moisture. In the theoretical section describes the methods of thermal analysis, and subsequently described in detail Thermogravimetry method, which is used in the measurement. Measurements are made using the Moisture Analyzer RADWAG 60 W/H connected with a PC, using a variety of samples from inorganic to organic. A great variety of samples was chosen because of demonstrations thermogravimetric methods and a better understanding of wetting and drying of different materials.
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Damage extent analysis of dry floors in case of a flood
Šír, Jan ; Vlach, František (referee) ; Bečkovský, David (advisor)
The thesis is focused on analysis of damage extent of dry floors in case of a flood. In the first part it deals with problems of buildings´ stress factors in the point of view of building physics, floor composition and its connection to constructions of timber houses. In the second part it describes testing of three experimental floor samples during simulated flood. It examines and evaluates the behavior and the way of spreading of the leaking water and the effect of moisture on the materials.
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Vysušování zdiva, sterilizace biotických činitelů pomocí mikrovlnné technologie
Sobotka, Jindřich ; Jiroušek, Zdeněk ; Šuhajda, Karel
Microwaves are electromagnetic waves of frequencies from 300 MHz to 300 GHz, corresponding to wavelengths from 1 m to 1 mm. For industrial application is allowed more frequencies, but we are mainly interested in the frequency 2 450 MHz, a wavelength of 12,2 cm, which we use in our applications. The heating occurs so that the electric field in the water molecules orient themselves according to polarization. Microwaves belong to a large family of electromagnetic waves, which also includes the visible light, which is governed by Maxwell's equations. Principle of microwave drying is based on the vibration of water molecules in the mass of masonry, of heat generated by their movement and friction, the conversion of water vapor and subsequent venting these few. Vibration of water molecules is the primary storyline in the process. Water molecules under these conditions are able to get rid of its energy potential, which is bound to the capillaries in the building material and prevents evaporation.
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Efficiency Analysis of Mechanical Redevelopment Methods with a Focus to the Problems of Joints of Inserted Materials
Mizerová, Lenka ; Tichomirov, Vladimír (referee) ; Myslín,, Jiří (referee) ; Solař,, Jaroslav (referee) ; Beneš, Petr (advisor)
Parameters that characterizes quality internal building environment come forth these days. One of the main reasons for the choice of the topic of this thesis is to ensure the quality of the internal environment and well-being during the usage of the buildings. Prevention of the excessive wall dampness is one of the basic conditions of a healthy and quality building environment. The thesis verifies reliability and compares the efficiency of the selected damp-proof materials and its joints. The first part deals with the influences that are reasons for the dampness of the buildings, earmark of an interest area, introducing of the valid legislation focused on the building redevelopment, consideration and evaluation of the building constructions in light of the dampness. The next part of the thesis sets main and partial targets and consecutive steps leading to fulfilment of the targets. Selection of the appropriate redevelopment procedures, materials and joints of the selected materials selected for the experiment realization follows. As this area is relatively large, we selected mechanical redevelopment methods reaching the walls and three most commonly used materials and its joints within the framework of the selected methods. There are three main steps set in the thesis: preparation of the methodology and experiment realization, measurement optimization and measurement within the laboratory and on the real buildings, comparison and evaluation of the measured values. Experimental part of the thesis took place between the years 2008 - 2011. Experiment realization comprises of material acquisition, building of the test samples and application of the single redevelopment measures. The next step includes measurement on the individual samples on the fixed measuring points. Measurements are evaluated through the mathematical statistical methods. Efficiency of the particular materials are compared and evaluated.
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Separation of water drops from jet of steam
Miček, Michal ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
This thesis is focused on separation water drops from jet of steam. Liested are some of basic principles of separation of moisture and particles, as well as equipment, which are using these principles. Furthemore, this thesis include the part devoted to water drop formation during condesation of vapor. Last part is focused on the design of cyclone separator.
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Re-design of biomass boiler for very wet fuel
Zbořil, Martin ; Skála, Zdeněk (referee) ; Lisý, Martin (advisor)
The aim of this thesis is to calculate the stoichiometric balance of boilers and boiler fuel for normal monture to 60%. Determine the monture, content depending on the conditions of the fuel in the combustion chamber and conditions of combustion. Experimental analysis of the current state of the boiler ZKG measurements using this device and propose modifications and solutions.
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