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Analysis of the distribution of the temperature profile in the furnace brazing using CAE systems
Stručovský, Aleš ; Vyroubal, Petr (referee) ; Maxa, Jiří (advisor)
The aim of this project is using the CAE system to analyze the distribution of the temperature profile brazing furnace DIMA 0180. To create the model is used SolidWorks Premium 2012. The simulation is performed using the Flow Simulation. This work builds on the knowledge diploma thesis by Martin Procházka titled The effect of different heat capacities and components on the longitudinal temperature profile for reflow soldering. We start from the knowledge of heat transfer, especially of heat conduction and radiation, which appear in the furnace.
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Flow sensor
Symerský, Tomáš ; Psota, Boleslav (referee) ; Kosina, Petr (advisor)
This diploma thesis is divided into two parts - theoretical and practical. In its first, theoretical part, deals with the theory of fluid and gas flow, heat transfer and diversification of sensors for flow measurement working on the electrical principle. It also deals with thermodynamic principle, which can be used for measuring very small flow and low-temperature ceramics that is used to implement microcanals for sensing very low flows. The practical part of the thesis deals with the very simulation of the entire structure in the program “COMSOL Multiphysics” - both in 2D and 3D views. Then there is shown the implementation and measurement of the flow sensor in a low-temperature ceramics, working on a thermodynamic principle.
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Model for the Cable Thermal Characteristic Calculation
Starý, Zdeněk ; Drápela, Jiří (referee) ; Orságová, Jaroslava (advisor)
The result of this assignment is the Model for the Cable Thermal Characteristic Calculation. Firstly, there is a prepared overview that is focused on the essential ideas of cable technology. The following part describes the simple possibilities of passaging the heat. Secondly,the physical essence of warming cables as well as the possibility to discover the methods how to calculate the warming cables are also mentioned in this task.There is an opportunity to find the methods for calculating the warming cables as well. The model was verificationed in the conclusion of my assignment. The measurement was done and the empirical results were compared with the results that were achieved by modeling.
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Transport of heat in refractory materials
Pařízek, Ladislav ; Havlica, Jaromír (referee) ; Ptáček, Petr (advisor)
The focus of my master’s thesis is a preparation of refractory insulating material made by foaming method. In the theoretic part are described properties of refractory materials especially thermal properties, classification of refractory materials and description of insulating refractory materials production. The experimental part of thesis focus firstly on problem solving during production process of material, characterization of materials with instrumentals method (SEM, XRD and TG-DTA-EGA) and examination of heat transfer in constructed equipment.
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Operating fouling of process and power equipment
Sénáši, Martin ; Pačíska, Tomáš (referee) ; Jegla, Zdeněk (advisor)
Bachelor thesis describes the issue of fouling of heat exchangers. This thesis briefly describes the fouling mechanisms and introduces the issue of consideration fouling in the design of heat exchangers. From gained information subsequently on simple calculation examples demonstrate using basic calculation methods impact of fouling on process stream. It also describes the impact of fouling on the technical and economic solutions of heat exchangers.
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Heat transfer on sprinkled tube bundle
Copek, Tomáš ; Pospíšil, Jiří (referee) ; Kracík, Petr (advisor)
This bachelor thesis named Heat transfer on sprinkled tube bundle deals with experimental assesment of heat transfer coefficient on sprikled tube bundle. Its goal is to measure, compare and evaluate values and trends of heat transfer coefficient on external surface according to flow rate of cooling water. Evaluation will be focused on size of pitch between tubes, type of tubes surface and influence of temperature gradient. Measurement was ongoing at atmospheric pressure. Warm water flowing in tube bundle is cooled by cold sprinkling water. Tube bundle consists of ten tubes located horizontaly beneath each other with smooth, grooved or sanblasted surface. Distance between tubes vary from 15 to 35 milimetres. Measurement of two temperature gradients 15-40 and 15-45 (15°C is temperature of sprinkling water in distribution tube; 40°C or 45°C is temperature of water entering the tube bundle) is carried out for each pitch and tube surface.
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Experiments critical heat flux
Štaffa, Petr ; Martinec, Jiří (referee) ; Suk, Ladislav (advisor)
The Bachelor’s thesis deals with phenomenon of critical heat flux in a core of nuclear reactor. The first part is dedicated to describe physical nature of critical heat flux and basic thermo mechanical and hydrodynamics terms. The second part is dedicated to summarize experimental investigations on critical heat flux and their process.
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Present production of heat exchangers in the Czech Republic
Dvořák, Jakub ; Bělka, Miloslav (referee) ; Jaroš, Michal (advisor)
The aim of this bachelor’s thesis is to compile summary of heat exchangers manufacturers, which occurs on Czech market. In the theoretical part of this thesis is stated distribution of heat exchangers according to some basic criterions (for example flow arrangement). This distribution is followed by short explanation of how heat transfer can be realized. In the end of the theoretical part of this thesis there are presented some physical relations and their description. More practical and main part of this bachelor’s thesis contains summary of heat exchangers manufacturers and examples of their products, which are divided to some categories, mainly according to construction. At the end, there is comparison of brazed plate heat exchangers from various companies in application for preparation of hot water.
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Design of cooling plate for vibration test stand
Drtílek, Juraj ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
This research deals witch thermal analysis of cooling plate for vibrational test of turbochargers. In introduction, the reader is familiar with principle of turbocharging, his importance and history. In this part of research is described also testing of turbochargers, especially vibration tests and its issue. The main part of research is focused on heat transfer, especially conduction, convection and radiation. This part is also completed with calculation of heat transfer coefficient, which is nessesary for thermal analysis of plate for vibration test stand, which is made in the last part of this work.
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Thermal measurement of the building
Kozák, Karol ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
Infrared measurements, as a method of contactless temperature measurement, has spread rapidly in various branches of industry. Nowadays, in era of saving energy and financial resources spent on building heating, it has become an inherent part of revisions and controls of excessive heat transfer over thermal bridges. The aim of this bachelor's thesis in it's first part is to describe the theory of infrared measurement and heat transfer of the building and the second part is focused on application of theoretical knowledge to evaluate the results of practical measurements of buildings A2, A3, A4 and A5 on Faculty of Mechanical Engineering, Brno University of Technology, which is regulated by the technical standard ČSN EN 13187.
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