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Study of the thermal insulation effect of thermally reflective insulations
Skříček, Darek ; Vala, Jiří (referee) ; Čermák, Jan (referee) ; Šťastník, Stanislav (advisor)
The dissertation on the topic Study of the thermal insulation effect of thermally reflective insulations is focused on the issue of measuring the thermal resistance R of thermoreflective insulations and determining the most suitable layer with the best thermal insulation properties. By measuring thermoreflective insulations on the Hot-Box measuring chamber, it was proven that higher values of thermal resistance R are always achieved with aluminum foil, which has the highest possible reflection of the radiant component of heat, i.e. the lowest possible emissivity on the surface. For this reason, the reflectance was measured on the Mid-IR Integrat IR ™ measuring apparatus. To study the thermal insulation effect of thermoreflective insulations, ten samples of these insulations with different compositions of aluminum and bubble foils are used to measure the insulation properties. The suitability of using thermoreflective insulation for building insulation was proven by measuring these foils.
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Thermography in engineering
Koten, Jakub ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
This work deals with non-contact measurement of surface temperatures. The aim of the first part is to explain basic terms, principles and ways of measuring temperature. Furthermore, there is an overview of thermal imagining cameras usable in industry. In the practical part there is a theoretically suggested experiment, which monitors the dependence of the surface temperature on the size of the cross-section of the workpiece during the turning under unchanged cutting conditions. Experimental measurements are executed with using thermocamera ThermaCAM SC 200 and they are evaluated in software called Researcher.
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Analysis of effect of solar radiation concentration on the thermal insulation degradation in the flat roof construction
Židek, Ondřej ; Běžel, Jakub (referee) ; Žák, Antonín (advisor)
The master´s thesis analyzes influence of direct and reflected solar radiation to heat strain and degradation of thermal insulation in the flat roof construction. In many building was a problem in a significant degradation of thermal insulation made from expanded polystyrene in the vicinity of glass surfaces. To determine the causes of this problem, it was necessary to study and test the properties of building materials and the physical nature of the effect of solar radiation on the building structure. In the introductory section lists the cases of buildings with degradation of thermal insulation and existing knowledge on this issue. The theoretical part describes the technical properties of thermal insulating materials used in the flat roof construction, nature and division of solar radiation, optical laws of light reflection and physical theory to explain the technical thermal behavior of building materials and structures. The last part describes a practical model and analyzing measured data in thermal stress in the flat roof construction. The practical part also determines the importance of different influences configuration structures using to dynamic simulations. At the end of the practical part they are validated theoretical knowledge obtained by analyzing data from a practical model.
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Study of utility properties thermal-reflective insulations in the buildings
Holeček, Dominik ; Skříček, Darek (referee) ; Šťastník, Stanislav (advisor)
The diploma thesis is partly dedicated to energetic efficiency of buildings and describes possibilities how to evaluate energetic efficiency of buildings in the Czech Republic. We also get to know with distribution of thermal insulators by material base and use in construction. There are also mentioned methods how to determine thermal insulations characteristics of heat insulations, so called heat conductivity coefficient. The last and the crucial chapter of theoretic part is dedicated to thermal-reflective insulations. There are mentioned some of the basic characteristics of insulations, material composition and heat transfer mechanism in their structure as well. Practical part describes measurement of thermal resistance of chosen samples of thermal-reflective insulations per measuring device on the principal of Hot Box method. In the next step was determined emissivity of aluminium foils which forms the surface of chosen samples of thermal-reflective insulations. In the end of thesis are defined possibilities of use thermal-reflective insulations in building structures especially in passive and low-energy buildings in climatic conditions of the Czech Republic.
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The use of thermovision technology in output control of power supplies
Rejžek, Jan ; Slaný, Martin (referee) ; Polzer, Aleš (advisor)
The aim of the thesis is to clarify the issue of non-contact surface temperature measurement with a focus on the thermal imaging cameras as a modern representative of pyrometers and thermovision technology used in the output control of power supply. To obtain the corresponding results of temperature control, it is necessary to know the exact values of emissivity of the measured materials. The experimental part of this thesis is focused on detection of emissivity of power supply parts.
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Emisivity and its Impact on the Heat Conductivity
Gančev, Jan ; Hejátková, Edita (referee) ; Szendiuch, Ivan (advisor)
This work deals with the issue of emissivity and its impact on the heat dissipation.The first part describes the basics of thermal management, the issue of emissivity and its measurement. In the second, experimental part, are dedicated the emissivity values of examined specimens. These values are then used as initial conditions for the thermal simulation. In the last part are compared the measured results and the simulated results and is evaluated the impact of emissivity for the heat dissipation.
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Utilization of thermal systems at power electrical engineering
Strnad, Karel ; Janda, Marcel (referee) ; Kuchyňková, Hana (advisor)
The main theme of the master's thesis is using of thermal camera to measure temperatures in electrical engineering. First are mentioned the physical principles of heat transfer. Then the thesis deals with methods of determining the correct emissivity of the measured object and in the next point with sensors designed for sensing infrared radiation, there is also part dedicated to evaluation software Report Sat Standard, which was used to evaluate the pictures taken with thermal camera SAT-HY 6800. Next part of this work is the measurement of the DC and EC motor with help of thermocamera, which took place in the electric company ATAS Nachod. Attachment to this master's thesis there is animation of EC motor created in Autodesk Inventor.
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Heating of flat house
Zajíček, Václav ; Vendlová, Lucie (referee) ; Topič, Jan (advisor)
The thesis is composed of three parts - theoretical, computational and a project part. The theoretical part deals with heat sharing through conduction, flow and radiation. The computational part is focused on the overall calculation of the heating system to operate smoothly and reliably. Three gas condensing boilers are designed as a source of heat. The heating of the water is solved as a reservoir. It's source of heat is one gas condensation boiler. The project part contains a technical report and the project documentation on the stage of the implementation dossier.
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IR thermometer
Petrucha, Martin ; Čech, Petr (referee) ; Rozman, Jiří (advisor)
This project is focusing to non-contact temperature measurement with using a knowledge about emmision in infrared spektrum using a battery powerred measurment device. The part of project is introdution of possibilities non-contact temperature measurement, introdusing with a basic types infrared sensors and subsequent design non-contact thermometer.
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