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Model of Orifice Flowmeter
Dvořáček, Tomáš ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
The aim of this Bachelor thesis is to make the orifice flowmeter accessible for laboratory tuition. The introduction of this Bachelor thesis explains and describes the issues of measuring of liquid flow rate. The individual measurement methods and the types of flowmeter sensors are introduced. The practical section of the Bachelor thesis consists of a proposal and an actual realisation of a model of an orifice flowmeter with a computer supported evaluation.
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Automated measurement system for ethene polymerization
Janošík, Zdeněk ; Richtera, Lukáš (referee) ; Přikryl, Radek (advisor)
Thanks to macromolecular chemistry development polymers become essential materials for wide range of applications. Research of catalytic systems used for production of polymers plays a key role in development of new polymer-based materials. The aim of this work was to develop system providing automated kinetic measurement of catalytic systems used in ethylene solution polymerization. The theoretical part of the thesis provides basic overview on chemical process taking part in ethylene polymerization and technical instruments used for its automation. Description of the devised system, its technical solutions and performed experiments used for verification its proper function are presented in the experimental part. Acquired data were compared with published results obtained with the same catalytic systems. Texts are accompanied by schemes, screenshots and photos.
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The determination of minimal countercurrent distance of the water surface sensor from the thin-plate V-notch weir.
Kopečná, Monika ; Zubík, Pavel (referee) ; Žoužela, Michal (advisor)
This thesis clarifies the issue of the measuring flows with the help of capacity measurement systems using Q/h characteristics and also describes measuring techniques for determining the water surface level. The various types of measuring weirs and their Q/h characteristics are described in detail. It also mentions the position of the installation of the sensor. The main task is to find a practical minimal countercurrent distance of the water surface sensors used in practice for use with a V-notch weir in the form of experimental measurements in the water management research laboratory at the Department of Water Structures Faculty of Civil Engineering in Brno. The weirs used for this experiment had top angle cutouts of 90°, 53°8´ and 28°4´. The obtained data is evaluated and subsequently the minimal countercurrent distance of the water surface sensor is determined. The thesis also includes recommendations for further research.
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Volume measurement discharge in surface runoff for refine continuous measurement
ŠEBOR, Ondřej
The thesis is divided into theoretical and practical part. The theoretical part includes issues associated with runoff and discharge, methods for discharge measurement and measurements of uncertainties. The practical part of the thesis describes a specific process flow measurement in Kopaninský and Jenínský stream. There is a familiarization with the water flow velocity measurement and comparison methods of volume measurement discharge with continuous measurement. The results of the practical part served to refine the rainfall-runoff processes in research catchment areas. Refined values of the flow rate were used as input data for the calculation of the runoff coefficient and for quantifying the losses of nutrients from the catchment areas. Calculation of the runoff coefficient and nutrient losses were compared for the original and the revised equation discharge curve. Volume measurement discharge has shown that the different conditions above measurement weir during continuous monitoring lead to the uncertainties of measurement. That´s why one has to approach to each flowmeasurement individually and consider the situation in a particular installation.
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Methods for discharge measurement in surface runoff - measurement of uncertainties.
ŠEBOR, Ondřej
The thesis is divided into theoretical and practical part. The theoretical part includes issues associated with runoff and discharge, methods for discharge measurement and measurements of uncertainties. In the practical part of the thesis a specific process flow measurement in Kopaninský stream is describes. The water flow velocity measurement is described and comparison of methods volume measurement discharge with continuous measurement is carried out. The purpose of this work is to gain more accurate data inputs for modeling of rainfall-runoff processes, especially in the calibration and validation stage, as well as for hydrological analysis and other studies conducted in research projects. Often due to different conditions upstream the weirs incorrect results may occur during measurements, so it is important to ensure verification of universal equations in the field with other methods of discharge measurement for further appropriate application. The result of this work is literature overview concerning runoff measurements techniques and measurements uncertainties serving as a basis for the continuation of the thesis. Further the results of practical part are used for primary verifications of continuous discharge monitoring and determination of a new equation of consumption curve.
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