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Behavioral Model of Current Conveyor with Advanced Controllable Inter-Terminal Relations
Jagla, Lukáš ; Langhammer, Lukáš (referee) ; Šotner, Roman (advisor)
Bachelor's thesis deals with model of current conveyor with advanced controllable inter-terminal relations. The behavioral model based on commercially available active devices has been proposed and designed as real implementation (including BCP design for experiments). Features of the behavioral model are verified by PSpice simulations as well as by experiments. Proposed device is utilized for synthesis and design of unconventional types of electronically controllable sine-wave oscillators and electronically adjustable filters. Simulated characteristics of the behavioral model as well as proposed applications are compared with experiments.
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Solid Particle Emissions from AgroPellets Combustion
Svoboda, Marek ; Milčák, Pavel (referee) ; Lisý, Martin (advisor)
This thesis is divided into two parts. The first part deals with defining the main concepts, properties of biomass and pellets. Further, the procedures for measuring agropellets properties according to valid standards are mentioned. The following is a selection of the raw materials for the production of agropellet, with the determination of their properties. The theoretical part closes background research emissions from combustion and emission standards for a solid fuel boiler. The second part is an experimental one, which determines the formation of solid pollutants in combustion of four types of pellets made from alternative sources. Here are the graphs of the gaseous emissions of each of them. At last there will be a comparison of emissions agro pellets with more widespread wood pellets.
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The issue of the revision corrected wiring residential building
Štefek, Roman ; Janda, Marcel (referee) ; Veselka, František (advisor)
Bachelor’s thesis deals with the verification of electrical installations in residential buildings. The task of the thesis is to get acquainted with the requirements of the regulations with a focus on Czech technical standard CSN 33 2000-6, CSN 33 1500 and follow-up. Specifically, the information gathered is used to the implementation of the review installations in renovated apartment building. The aim is to apply the theoretical knowledge and information for the practical verification of the electrical installation.
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Design of corrugation measuring device
Valena, Martin ; Omasta, Milan (referee) ; Galas, Radovan (advisor)
This bachelor thesis describes the development of experimental corrugation measuring device. In the first part, mechanisms of corrugation formation and classification of corrugation, together with an analysis of measuring devices are described. According to the analysis, several design configurations were developed. The final variant is described in detail, together with the calculations. The output of this bachelor thesis includes complete technical drawings and price estimation.
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Flow rate measurement for hydraulic turbine model tests
Neděla, Jiří ; Dokoupil, Pavel (referee) ; Machů, Tomáš (advisor)
This thesis deals with problematice of flow rate measurement for hydraulic turbine model tests. Theoretical part is devoted to literary search of flowmeters and comparison of their accuracy. The practical part deals with evaluation of measurement uncertainties during calibration of the flowmeter. It also includes verification of the measurement accuracy of the flowmeter indicated by the manufacturer.
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Steam Flow Measurement Error Analysis
Barabášová, Iveta ; Touš, Michal (referee) ; Bobák, Petr (advisor)
The thesis deals with analysis of measurement uncertainty. The theoretical knowledge presented in opening chapters is applied on indirect steam flow measurement by orifice plate. Calculation of steam flow is based on knowledge of pressure difference value, static pressure value and temperature. The data are acquired by experimental measurement in laboratory. The mass flow rate uncertainty is determined by normalized procedure (according to standard ČSN EN ISO 5167) and by detailed error analysis (according to standard ČSN ISO 5168) for comparison. Whole numerical computation employs python programming language in Spyder environment. Other computation result is steam consumption of washing cycle.
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Drivers clothing thermal resistance database for iHVAC system
Hrubanová, Kristýna ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
This diploma thesis is focused on measurement of thermal properties of clothes by thermal manikin and on application of results for prediction of thermal comfort in system iHVAC. First part of thesis is dedicated to research with relation to this topic and to definitions of main computational equations necessary for experimental measurement. The choise of method for measurement based on available standards is an important part of this thesis. The main focus of thesis lies on measuring 5 combinations of clothes at different calibration temperatures and same temperature of manikin surface. Then data are examined and also the analysis of uncertaities and repeatability is maked. According to assupmtion , the independence of value of heat transfer coefficient to ambient temperature is comfirmed and calculated heat resistance of every single clothes is compared to existing wardrobe for system iHVAC. The outcome of this thesis is specificied and completed virtual wardrobe which serves to prediction of thermal comfort in car.
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Surface tension measurements
Hála, Ondřej ; Vimmr, Jan (referee) ; Košťál, David (advisor)
The thesis deals with study of surface tension of liquids and measuring possibilities of this parameter. The paper is then focused on design of measuring apparatus based on pendant drop method. The apparatus is controlled with software written in Matlab. Several measurements are done at the end of this work, which confirm possibility to practical use of this apparatus for surface tension measurements. A part of this work is manual to use the apparatus and complete design documentation.
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Company Performance Measurement
Kotíková, Martina ; Horváthová, Renáta (referee) ; Bartoš, Vojtěch (advisor)
This master s thesis deals with the performance evaluation of the company Agrochov Jezernice a.s. using Balanced Scorecard approach for increasing performance. This thesis consists of the theoretical part with detailed company introduction and its activities as well as strategic and financial analysis on the basis of which it was possible to set the Balanced Scorecard proposal to develop the company's performance. assessment and prepare the overall implementation proposal.
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Smartphones as experimental tools to take measurements in environmental engineering
Bernard, Jan ; Hejčík, Jiří (referee) ; Jedelský, Jan (advisor)
The thesis is focused on the measuring of the physical quantities by the means of smartphones. It gives a list of the sensors which smartphones contain and it briefly describes their function in ordinary use and their use for the measuring not only physical quantities. Sensors of the mechanical quantities are documented in a greater extent. The measurement limits are addressed as well as the information what inaccuracies of measured quantities can be expected. The study also deals with the added devices which help to overcome the limits of inbuilt sensors and by that they make the measurement more accurate. A review of several researches on already made measurements of the mechanical quantities with smartphones is also given. The last part of the study describes an experiment during which six mobile phones with Android system and six applications were tested by measuring a pink noise signal. Two main facts follows from the results. The measurement with a phone calibrated previously cannot be considered as reliable, the errors can be in the rate of tens of decibels. Whereas phones after calibration in the levels range 45 – 85 dB, when the measuring error is linear, can be used for measurement of the noise with the error less than 2 dB.
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