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Design of climatic chamber
Novák, Petr ; Šperka, Petr (referee) ; Frýza, Josef (advisor)
This bachelor thesis deals with the construction of climatic chamber, which allows continual change of temperature of air within the range of -10 to 50 °C and continual change of relative humidity of air within the range of 10 to 90 %. The chamber is going to be connected to optical tribometer or to Mini Traction Machine (MTM). Both these devices serve for observation of tribological processes in laboratory conditions. Climatic chamber is going to approximate these laboratory conditions more to the real ones by the modification of temperature and air humidity. In the thesis there is stated a concept of particular climatic units, a concept of the arrangement of these units and consecutive constructional solving of the whole device with the emphasis on simple construction, low charges of production, assembility and small proportions of the whole construction
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Creation of a web application to select polymer materials based on mechanical properties for 3D printing
Kaziměrčíková, Lada ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This diploma thesis deals with 3D printing with a focus on the FDM method. Main objective of the thesis is to develop a web application which would assist in the selection of suitable polymer materials for FDM print, based on the required mechanical properties. The web application was created in Python with the usage of Flask framework and MySQL database. In order to develop this application, it was necessary to create an overview of material properties, mainly mechanical parameters and degradation mechanisms. Subsequently, testing in a climatic chamber was done, and also hardness and tensile tests for degraded samples. The collected data serves as the base of the understanding how given mechanical parameters may affect selection of the polymer material. The thesis then offers a practical instrument to help choose right material for FDM printing projects.
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Verification of setting speed and building adhesion of PU adhesives depending on external conditions
Slatinská, Jana ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
The company IFE a. S. (Knorr - Bremse) in Modřice needed to verify the curing process of glued joints with the used adhesive Sikaflex®-265. The aim was to find out whether a controlled environment is needed for curing and mainly find out influence of factors on the curing process and the velocity of building adhesion. The main factors that were investigated were temperature, humidity, the ratio of the Sikabooster® P-50 to the tested adhesive and the curing time. The result then shows which factors have an influence and which only minimal. The aim was also to verify the strength of the joint, which is stated by the manufacturer after a specific time. The impact on open technology time has not been measured.
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Climatic tests of the calibrator 9010
Plánka, Mikuláš ; Sitta, Michal (referee) ; Šedivá, Soňa (advisor)
This bachelor thesis deals with climatic testing of Calibrator 9010. The content of this work is a theoretical analysis of climatic tests. Furthermore, the properties of the Caliber program are described here. Caliber program in this work is used for automated measurement. The next chapter in the work is a description of the properties and functions of the Calibrator 9010. In the practical part of the work, the points of the measurement itself are proposed. Based on the design of points, a procedure is created in the Caliber program. Procedure is used to measure data. The measured results in the work were evaluated.
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Ecology of critically endangered \kur{Sedum villosum}-experimental study
DILLINGEROVÁ, Hana
The aim of this diploma thesis was to elaborate a literature survey and especially to conduct an experimental study of ecological demands of the critically endangered species Sedum villosum. The localities, on which S. villosum formely occurred, disappeared largely because of habitat destruction by draining and plowing of wet meadows, or by the abandonment followed by development of high vegetation and biomass accumulation. Therefore, this work could contribute to the knowledge of shadow influence and surrounding vegetation concurency on seed germination and flowering of this species. Retrieved knowledge can be later used for rescue program realization (repatriation options, strengthening populations, habitat requirements). The experiments showed a significant negative effect of the shading and the presence of surrounding vegetation (sedges, brown mosses and peat mosses) on germination and flowering of S. villosum. Furthermore, it was found that S. villosum is able to germinate directly on water surface, with seed germination even higher than on wet soil. The experimental sowing, planting and subsequent monitoring of germination, growth and survival of S. villosum at the rehabilitated area of Knížecí Pláně (NP Šumava) showed that it is possible to strengthen S. villosum population by sowing and planting autochthonous material on prepared areas with a torn down turf. As an acceptable tools seems to be using mulch from mown in the area of the original population. Similar process can be used in the future for restoring historical localities of this species.
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Regulation system for climatic test chambers
Burian, Jan ; Palíšek,, Libor (referee) ; Polsterová, Helena (advisor)
This paper contains 5 main parts. The first deals with the general description and properties of the climatic chambers, their individual parts and how these parts work. The second part deals with the chamber of Angelantoni CH 340. In detail is described how the chamber works and there is description of this chamber up to individual parts. The third part deals with the reconstruction project, the possibilities of reconstruction and the method that the chamber reconstructed. The fourth part describes the hardware that had to be selected and replaced and which parts of the chamber had to be modified. In the last part is a description of the program that controls the chamber after the reconstruction.
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Mathematical-physical analysis of climatic chamber
Repko, Ilia ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
This work deals with the mathematical and physical analysis of the climatic chambers. The theoretical part describes the issue of climatic chambers, software SolidWorks and ANSYS Fluent, basic equations describing fluid status and fluid turbulence. The practical part of the thesis is to create the model of climatic chamber in CAD system SolidWorks and simulation of flow and and temperature distribution by ANSYS Fluent. At the end of the work the results are analyzed and evaluated.
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SW for control of climate tests
Fedor, Denis ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This thesis deals with control of a specific climate chamber used for various climate tests. Therefore its elaboration starts with the identification of properties of this climate chamber and basic design of its control. This is followed by measuring the temperature distribution in its internal space in order to verify the usability of this climate chamber. The thesis also does not omit a description of the communication options between climate chamber and application for control of climate tests. The next part of this thesis concerns the design and implementation of the application for control of climate tests itself. On its output is a report of the performed climate test. In the end this thesis contains the description of program testing in the real operation of the company and other possible improvements of the implemented program.
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