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Cold asphalt mixtures
Spáčil, Petr ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis is divided into theoretical and practical part. The theoretical part consists of explanation of the problem. The thesis includes definitions as Bitumen, Asphalt Mixture, Asphalt Binder, Cut-back Bitumen and Viscosity. The practical part is focused mainly on the description of the test methods used on Asphalt Binders and Mixtures which were intended for repairs. It describes differences between used Asphalt Binders and explains and describes other used materials. The practical part compares the mixtures of different Cut-back Bitumen. It describes the production process and project of Cut-back bitumen mixture, the production process of individual test solids and compares the differences with hot made asphalt mixture. It also describes the analysis of volumetric, mechanical-physical and funcional tests in purpose of evaluating the differences between standard Cut-back Bitumen and new biofluxed asphalt binder.
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Vortex tube made by additive technology
Spáčil, Petr ; Šnajdárek, Ladislav (referee) ; Chýlek, Radomír (advisor)
The aim of this bachelor's thesis is designing and 3D printing of a detachable Ranque-Hilsch vortex tube. In the following chapters will be presented basic types of vortex tubes and its usage. Then the thesis deals with parameters, that have an impact on the effectiveness of vortex tube. In the main part, the design of individual parts is described. After 3D printing and assembling, the vortex tube's performance is measured with variations of some parameters.
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Digitally controlled laboratory power supply
Spáčil, Petr ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis deals with the divison and research of DC voltage sources. It also describes how linear and switch mode power supply works. The 8-bit ATmega16 microcontroller from the ATMEL family of AVR microcontrollers is further described. Part of this bachelor thesis is the desing of the laboratory power supply source 30V / 3A, which is in the topology of switched pre-regulation. The ATmega 16 microcontroller provides measurement and displaying values on the display.
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Leakage measurement for hydrogen gases
Spáčil, Petr ; Brázdil, Marian (referee) ; Šnajdárek, Ladislav (advisor)
This master's thesis deals with the measurement of hydrogen gas leaks and addresses key aspects related to hydrogen properties, storage, use, safety aspects, detection methods and seal testing. The study highlights the importance of safety in handling hydrogen and includes a thorough analysis of its properties. It discusses different methods of measuring hydrogen concentration and detecting leaks and assesses the suitability of different gasket materials such as polyester, elastomer, steel and graphite for use with hydrogen. Furthermore, the thesis presents experimental investigations into leakage testing. The findings of the study assist in the selection of the right gaskets and improve understanding of leak measurement techniques, which in turn improves the safety and efficiency of hydrogen applications.
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Cold asphalt mixtures
Spáčil, Petr ; Hýzl, Petr (referee) ; Dašek, Ondřej (advisor)
The bachelor thesis is divided into theoretical and practical part. The theoretical part consists of explanation of the problem. The thesis includes definitions as Bitumen, Asphalt Mixture, Asphalt Binder, Cut-back Bitumen and Viscosity. The practical part is focused mainly on the description of the test methods used on Asphalt Binders and Mixtures which were intended for repairs. It describes differences between used Asphalt Binders and explains and describes other used materials. The practical part compares the mixtures of different Cut-back Bitumen. It describes the production process and project of Cut-back bitumen mixture, the production process of individual test solids and compares the differences with hot made asphalt mixture. It also describes the analysis of volumetric, mechanical-physical and funcional tests in purpose of evaluating the differences between standard Cut-back Bitumen and new biofluxed asphalt binder.
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Vortex tube made by additive technology
Spáčil, Petr ; Šnajdárek, Ladislav (referee) ; Chýlek, Radomír (advisor)
The aim of this bachelor's thesis is designing and 3D printing of a detachable Ranque-Hilsch vortex tube. In the following chapters will be presented basic types of vortex tubes and its usage. Then the thesis deals with parameters, that have an impact on the effectiveness of vortex tube. In the main part, the design of individual parts is described. After 3D printing and assembling, the vortex tube's performance is measured with variations of some parameters.
|
|
|
Digitally controlled laboratory power supply
Spáčil, Petr ; Drexler, Petr (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis deals with the divison and research of DC voltage sources. It also describes how linear and switch mode power supply works. The 8-bit ATmega16 microcontroller from the ATMEL family of AVR microcontrollers is further described. Part of this bachelor thesis is the desing of the laboratory power supply source 30V / 3A, which is in the topology of switched pre-regulation. The ATmega 16 microcontroller provides measurement and displaying values on the display.
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