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Microplastics removing from water
Ermis, Martin ; Himr, Daniel (referee) ; Štigler, Jaroslav (advisor)
This thesis deals with the occurrence of microplastics in water, the reasons for their potential elimination, and the possibilities leading to that. More specifically, it focuses on flotation as a process for removing microplastics from water. Flotation is further described from a theoretical point of view and its mathematical model is developed. The wettability of selected polymers is measured. The experiment performed to determine the efficiency of flotation as a process of treating water from microplastics is described. This efficiency is further compared to measured wettability.
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The Delivery of the Mixture Containing Abrasive Particles.
Hrabina, Martin ; Sluše, Jan (referee) ; Štigler, Jaroslav (advisor)
The aim of this bachelor thesis is focused on description of the transport equipment parts used in some industries for delivering of the mixture containing abrasive particles. The thesis is divided into some captures. Each of them deals with the transport issues. The first part of the thesis is focused on the flow of liquid in transport equipment. Second part describes particular parts of pumps and compares various kinds of them, highlighting their advantages. One of the significant topics of the thesis is the characterisation of pipeline using for the above mentioned transport.
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Utilization of the greywater
Zríni, Miroslav ; Soukup, Lubomír (referee) ; Štigler, Jaroslav (advisor)
The bachelor work consists of two parts. First is the theoretical research about waste water of household. Due to the different features of the water, it is divided into greywater and rainwater. In each section are mentioned properties, quality needs, cleaning method and others. Concrete utilization of these waters is illustrated on the recycling system by company Asio. s.r.o. Last chapter deals with heat recovery of the greywater. Second, the practical part is aimed at proposal of a small recycling unit in certain location. It includes proposal of a storage tank, selection of a pump device or water station and any necessary accessories. The end is concluded with financial balance-sheet of the project.
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Seting of Working Point of co-Operated Centrifugal Pumps
Sůkal, Jaroslav ; Koutný, Luděk (referee) ; Štigler, Jaroslav (advisor)
The aim of my diploma thesis is to create a computer program that will help planners to design pipe systems. The program enables to find the parameters of a pumping unit (such as flow, head, power, efficiency, dissipation etc.) in a parallel pipe system which even has two tanks with dissimilar height. Moreover, the program is able to “calculate” the parameters of pumps that have maximum efficiency so that the planner could easily compare the data and determine whether the pump is working near the optimal point. The introduction includes a short overview of issues connected with pumping equipment. The next part deals with a description of software solutions of individual problems. The thesis concludes with a manual of the designed computer program.
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Particle separation from fluid flow
Fejta, Vojtěch ; Urban, Ondřej (referee) ; Štigler, Jaroslav (advisor)
This bachelor thesis deals with the particle separation from fluid flow. The aim of this thesis is to get acquainted with the already existing methods of separation, to study their principles and to describe devices designed for particle separation. The thesis is divided into two main units, the first explains the individual methods of separation, the second describes the specific particle separators, their advantages and disadvantages. The final part of the thesis is devoted to the design of another approach to separation.
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The pump station design for hydro-mixture transport
Béreš, Matej ; Štigler, Jaroslav (referee) ; Habán, Vladimír (advisor)
This master’s thesis is concerned about the flow of hydro-mixture in pipelines. In the first part, I am reviewing the characteristics of disperse systems, pumps and pipelines used in hydro-mixture transportation. Slurry pumps and polyethylene HDPE pipelines receive an extra attention. In the second part, I am working with data obtained from the co-operation with the PROGROUPE Sediment Removal company. These data were measured during revitalization of the water dam Gabčíkovo. In the next step, I use the data to suggest the required characteristic for the slurry pump for pump station in project of revitalizing Borovoe lake, situated in Kazakhstan.
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The pump in the turbine regime in the hydraulic circuit
Šimunek, Ondřej ; Štigler, Jaroslav (referee) ; Haluza, Miloslav (advisor)
This thesis is focused on finding an optimal working area of a pump running in a turbine mode and choosing a suitable pump from a company catalogue. Calculations of a water tower are accomplished based on basic equations of hydromechanics. The optimal working area of a pump running in turbine mode is determined with respect to maximum power. Based on the turbine characteristics is found the pump design point for which is chosen a mass-produced pump from a company catalogue.
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Measuring of Velocity Profiles in Liquids by Using of UVP
Kárník, Jan ; Stejskal, Jiří (referee) ; Štigler, Jaroslav (advisor)
The following bachelor's thesis deals with one possible way of determination velocity profiles in liquids. Content of the thesis is focused mainly on the method of the UVP (Ultrasound Velocity Profile), on the ways and principles of measuring, on its pluses and cons and it´s comparison with the other conventional methods, like for the example the PIV (Particle Image Velocimetry) and LDA (Laser Doppler Anemometry). There is also the possible placement of the transducers to the measuring system discussed. Furthermore the thesis deals with trouble in the test measurement. At the beginning this work deals with familiarization with principle and function of the measuring device and with the device for the method UVP itself. Apart from the UVP measuring method the thesis also deals with short description of the competitive methods – PIV, LDA, which are used to measure the velocity profiles nowadays. Particular attention is given to the PIV method, which significance is currently growing. In conclusion, there is comparison of different methods with the UVP method made and there are the future steps to realize the successful measurement with UVP method also discussed.
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The design of fountains system
Müller, Patrik ; Štigler, Jaroslav (referee) ; Haluza, Miloslav (advisor)
The goal of this thesis is to design the fountain system. Nozzles have to squirt to the same height. Flow has to be the same on each nozzle and it has to be done for our given dimensionsThe right pump has to be chosen, but it cannot be done without proper knowledge of theroy of hydrodynamic resistence, basic hydromechanics and characteristics of the valves.
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Study of heat transfer by turbulent flow in cold helium gas in experiment with Rayleigh-Bernard convection at ISI CAS in Brno
Balko, Marek ; Štigler, Jaroslav (referee) ; Macek, Michal (advisor)
The diploma thesis deals with the study of Rayleigh-Bénard convection for Rayleigh numbers in the range 1E8-1E14. The evaluated data come from an experiment with cryogenic helium in a cylindrical cell in a configuration with cell diameter D = 30 cm, height L = 30 cm and a second configuration with cell diameter D = 30 cm, height L = 15 cm. Miniature sensors recorded temperature fluctuations over time under various physical conditions and properties of helium. Using MATLAB software, the output parameters of the system (Nusselt and Reynolds numbers) and their dependence on the control parameters (Rayleigh and Prandtl numbers) were determined from the measured data. A new approach to the distribution of measured signals according to the direction of large scale circulation was used in the work, which leads to improved analysis. Reynolds numbers were evaluated using the so-called elliptic method. Furthermore, the work deals with the study of the coherent structure of the large scale circulation inside the cell.
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