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Risk Analysis for Intermittent Water Supply Systems
Alayoubi, Mzayan ; Říha, Jaromír (referee) ; Munka,, Karol (referee) ; Tuhovčák, Ladislav (advisor)
Intermitted Water Supply strategy is implemented commonly in some developing countries nowadays in order to minimize the water scarcity problems. Unstable hydraulic conditions in the distribution system, low pressure, high risk of water contamination, wasting water, rising costs paid by consumers and water providers, failures and problems with consumption metering and inconvenience to consumers are some of the consequences. Risk Analysis Methodology is developed to handle with intermittent water supply systems in developing countries conditions that include undesired events identification; risk estimation and risk evaluation and reduction plan, the catalogue list of potential undesired events (UE) which may occur in these types of systems have been also developed using the HAZard and OPerability technique (HAZOP). The developed methodology is implemented and tested in this research on one of the potential undesired events UE _ Low operational pressure
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The use of fluid medium in forming technologies
Březina, Vít ; Peterková, Eva (referee) ; Podaný, Kamil (advisor)
This publication includes a research of currently used technologies with liquid as a forming or supporting medium. There is a description of methods of Hydroform, ASEA, Wheelon, Flexform, hydro-mechanical forming, Pillow hydroforming and groups of high-pressure, low pressure and pressure sequence hydroforming. The publication also includes analysis of the media used for lubrication of contact surfaces during the process of forming and operating fluids. The publication shows examples of companies which are using this technologies and samples of their products.
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Cold Chemical Lamination of Low Temperatue Co-fired Ceramics
Jurásek, Matěj ; Somer, Jakub (referee) ; Štekovič, Michal (advisor)
This paper deals with production of the structures fabricated using low temperature co-fired ceramics. Focus is on the lamination of raw ceramic tapes. There are presented classical thermo-compressive methods and a new method using chemical solutions for tape bonding. Describes new lamination technology and their advantages are the absence of elevated temperatures and high pressures. This method reduces using of higher temperatures and high pressure during lamination. On the other hand, chemical process of tape bonding is not flawless. There are many problems including solvent deposition, extreme sensitivity to dust and other processing parameters. It also describes the fabrication of structures by chemical way. Specifically, analyzes the method Cold Chemical Lamination and provides examples of possible deposition solvents which are needed for etching the surface of the LTCC tape during the lamination.
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Air valve as protection from water hammer
Sedlmajer, Jakub ; Machů, Tomáš (referee) ; Himr, Daniel (advisor)
The thesis deals with air valves, focusing on vacuum air valves. The theoretical part describes basic water hammer theory, especially low pressure problematics. Subsequently there are briefly explained any of usual water hammer protections, air valves function principles and differences in vacuum air valves constructions. The work is finished by measurement which evaluates reduction of pressure head according to use of this kind of protection.
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Air valve as protection from water hammer
Sedlmajer, Jakub ; Machů, Tomáš (referee) ; Himr, Daniel (advisor)
The thesis deals with air valves, focusing on vacuum air valves. The theoretical part describes basic water hammer theory, especially low pressure problematics. Subsequently there are briefly explained any of usual water hammer protections, air valves function principles and differences in vacuum air valves constructions. The work is finished by measurement which evaluates reduction of pressure head according to use of this kind of protection.
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Arc–Anode Attachment Area in DC Arc Plasma Torch at Low Pressure
Ondáč, Peter ; Mašláni, Alan ; Hrabovský, Milan
Studying the processes in the anode attachment area of a DC arc plasma torch helps to extend the lifetime of the anode, stabilize the plasma flow for plasma spraying and better understand the movement of the anode attachment. In this work, such processes were studied at low pressure, by a non-disturbing method, using a high-speed camera and a high voltage probe. We also found pressure ranges, in which the following transitions were observed: the constricted/diffuse anode attachment, and subsonic/supersonic plasma jet\n
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Risk Analysis for Intermittent Water Supply Systems
Alayoubi, Mzayan ; Říha, Jaromír (referee) ; Munka,, Karol (referee) ; Tuhovčák, Ladislav (advisor)
Intermitted Water Supply strategy is implemented commonly in some developing countries nowadays in order to minimize the water scarcity problems. Unstable hydraulic conditions in the distribution system, low pressure, high risk of water contamination, wasting water, rising costs paid by consumers and water providers, failures and problems with consumption metering and inconvenience to consumers are some of the consequences. Risk Analysis Methodology is developed to handle with intermittent water supply systems in developing countries conditions that include undesired events identification; risk estimation and risk evaluation and reduction plan, the catalogue list of potential undesired events (UE) which may occur in these types of systems have been also developed using the HAZard and OPerability technique (HAZOP). The developed methodology is implemented and tested in this research on one of the potential undesired events UE _ Low operational pressure
|
|
|
Cold Chemical Lamination of Low Temperatue Co-fired Ceramics
Jurásek, Matěj ; Somer, Jakub (referee) ; Štekovič, Michal (advisor)
This paper deals with production of the structures fabricated using low temperature co-fired ceramics. Focus is on the lamination of raw ceramic tapes. There are presented classical thermo-compressive methods and a new method using chemical solutions for tape bonding. Describes new lamination technology and their advantages are the absence of elevated temperatures and high pressures. This method reduces using of higher temperatures and high pressure during lamination. On the other hand, chemical process of tape bonding is not flawless. There are many problems including solvent deposition, extreme sensitivity to dust and other processing parameters. It also describes the fabrication of structures by chemical way. Specifically, analyzes the method Cold Chemical Lamination and provides examples of possible deposition solvents which are needed for etching the surface of the LTCC tape during the lamination.
|
|
|
The use of fluid medium in forming technologies
Březina, Vít ; Peterková, Eva (referee) ; Podaný, Kamil (advisor)
This publication includes a research of currently used technologies with liquid as a forming or supporting medium. There is a description of methods of Hydroform, ASEA, Wheelon, Flexform, hydro-mechanical forming, Pillow hydroforming and groups of high-pressure, low pressure and pressure sequence hydroforming. The publication also includes analysis of the media used for lubrication of contact surfaces during the process of forming and operating fluids. The publication shows examples of companies which are using this technologies and samples of their products.
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