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The use of optical fibers in potentially explosive atmospheres
Mafka, Martin ; Münster, Petr (referee) ; Filka, Miloslav (advisor)
The main object of semestral’s thesis was show familiarize with using optical networks in explosive areas. The thesis is divided into several basic thematic areas, in which we describe the divison by environmental threats hazards, types of protections optical systems, types of testing and verification of optical systems and ignition hazard assessment. The last chapter illustrates the method and procedure, which will be used in the practical part.
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Temperature Measurement in Technical Diagnostics
Szmek, Tomáš ; Janečka, Jan (referee) ; Vdoleček, František (advisor)
The purpose of this bachelor’s thesis is to familiarize a reader with possibilities of temperature measurement along with constructions and functions of particular measuring instruments and to present their positive and negative aspects. Both basic contact thermometers used in common life and complex systems (thermovision) employed in the most demanding industrial application are described here. The thesis depicts temperature as a diagnostic value according to which the causes of machinery failures are easily detected and subsequent accidents prevented.
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Design of heating of primary school
Pánková, Pavlína ; Vyhlídalová, Karolína (referee) ; Horká, Lucie (advisor)
The goal of this master's thesis is to design the heating system for the existing building of an elementary School. The thesis is divided into three parts. In the first theoretical part, I discusses heat transfer methods, the influence of covers on heating elements, and the determination of radiant and convective power components. The second part solves the heating system's design in three heat source variants. The first option comprises six heat pumps. The second option includes a combination of direct evaporation for air handling units and heating using heat pumps. The third option involves the installation of gas condensing boilers. At the end of the second part, a technical report is written and drawing documentation is attached. The last third part is dedicated to the experimental measurement, in which the effect of the front plate on the performance of the heating element was ensured.
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Non-contact temperature measurement
Sládek, Vojtěch ; Minář, Petr (referee) ; Hermanský, Dominik (advisor)
The aim of the thesis was the study of non-contact temperature measurement and the use of this measurement in the field of production machines. The first part of thesis includes concepts and definitions that are necessary for familiarization with the issue. In the second, practical part, contact and non-contact measurements were compared in two experiments. In the first one the machine frame was measured, on which the thermal load was simulated, the emission was determined, which was compared with emissivity from the tables. In the second experiment, the temperature gradient of the ball screw was measured during the ball screw operation and was determined emissivity, which was again compared with the table values. The conclusion of the thesis summarizes advantages and disadvantages of non-contact measurements that have been verified in practice.
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Verification of the model for predicting the properties of the combustion process
Horsák, Jan ; Kilkovský, Bohuslav (referee) ; Jegla, Zdeněk (advisor)
This work thoroughly analyzes a previously created computational model for predicting characteristic properties of the combustion process in an experimental combustion chamber. Any found shortcomings of the original model are removed and the model is further improved prior to its application on 11 real cases of combustion tests performed at various conditions and with various fuels. Data provided by the model are confronted with the data obtained during the combustion tests and the model accuracy is evaluated, based on local heat flux along the length of the combustion chamber. Finally, the overall usefulness of the model is determined by the means of evaluating the acquired accuracy values, and further possibilities of model improvement and use are presented.
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Temperature measurement in electric machines
Halfar, Ivo ; Huzlík, Rostislav (referee) ; Janda, Marcel (advisor)
The bachelor's thesis Temperature measurement in electric machines deals with beginning and exuding of the heat of electric motors and measuring of the temperature. The temperature is one of the most important values in diagnostic. High temperature could damage an isolation and it could tend to destroy of the whole machine. The temperature influences their magnetic properties on motors with permanent magnets. If you reach the Curie temperature it could come to its demagnetisation. Measuring of the temperature is important to verify allowable warming of motor or more precisely its spooling. The measuring of the temperature is needed for making motors with minimum of charges and its worth at the end. We could use two methods for measuring the temperature. It is contact and noncontact method. Warming and decomposition of the temperatures it is possible to appoint also with help of theoretic computations which are getting of the method of final elements. A lot of computer programs is using this method. Because of the existence of many sorts of electric motors, one of the viewpoints is the principle of working, another one is the construction. I concentrate on problems of asynchronous motors. In this bachelors thesis I have done theoretical calculation and contact and noncontact method of measuring of warming of the asynchronous motor.
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Temperature measurement using the pyrometers
Holík, Denis ; Kaňa, Václav (referee) ; Podaný, Kamil (advisor)
The thesis is pursuing research and analysis of information about function principles of pyrometers. Complex problematic of particular types of pyrometers and options of practical use is analysed. Basic errors of contactless temperature measurement are also included. Parameters of particular types of pyrometers are processed in the form of a table.
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Decontamination of Persons at Medical Facilites during CBR Events
Magulová, Eva ; Urbánek, Pavel (referee) ; Rosická, Zdena (advisor)
The aim of this work is the effort to bring new insight into the possibility of decontamination in healthcare facilities. In the first part are briefly explained keywords. The second part is a brief preview of the sarin attack in the Tokyo metro and the cooperation of Japanese rescue system in this event. It is followed by estimated procedure of integrated rescue system of the Czech Republic at the same event in the Czech Republic. Then is a proposal of some problems arising from improvised decontamination in the unequipped hospital and a proposal for the possible course of decontamination in a medical device.
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New Trends in Ionizing Radiation Shielding Research and Development
Vláčil, Martin ; Šťastný, Ondřej (referee) ; Katovský, Karel (advisor)
This thesis deals with the problem of shielding ionizing radiation which is a beam that has enough energy to ionize an atom or a molecule of an irradiated substance. This radiation can occur in nuclear facilities such as a nuclear power plant, a particle accelerator, or in X-rays in healthcare. Until now, standard shielding materials, most often lead or concrete, have been used to protect against ionizing radiation. New trends are therefore trying to replace these materials with lighter, more effective and harmless materials. The practical part is focused on measure the data to obtain the basic properties of shielding materials, such as the attenuation factor and the buildup factor. A measuring platform is described here, which can be used to measure the data needed to calculate the attenuation factor and the buildup factor. The measurement results are compared with tabular values to determine the accuracy of the measurements. Furthermore, the results of measurements of five concrete materials from the company MICo, spol. s r.o. To obtain theoretical values, the simulation program MCNP6 was used, in which it is possible to create a model of the measuring platform, which was used in practical measurements. Next the shielding material, source and detector are defined. The result lead again to the data needed to determine the attenuation factor. The results of measurement and simulation data in MCNP6 are evaluated and graphically processed into such a form that it is possible to compare the properties of shielding materials with each other.
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