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Car cabin passive cooling system performance study
Viščor, Petr ; Hejčík, Jiří (referee) ; Fišer, Jan (advisor)
The work is focused on issue of passive cooling in a cabin of a car. The basic principles and mechanisms of heat transfer are described in the theoretical part and the quality of cabin environment in terms of thermal comfort and air quality is discussed as well. Next part of the work describing the principles of ventilation and air conditioning of cabins and possible methods of passive cooling are discussed. Passive cooling means decrease of temperature of cars interior, without need of energy supply from car battery, or fuel. The last part of the work includes numerical simulation of selected methods of passive cooling using the THESEUS-FE 3.0 software. Simulations were performed on model of Volkswagen Polo car and primarily were focused on testing of functionality of various methods of passive cooling.
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Calculation algorithms for thermal-hydraulic design and rating of unconventional heat transfer equipment
Mikeška, Petr ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
The aim of diploma thesis is creating calculation algorithms off single types unconventional heat transfer equipment and their aplication in thermal - hydraulic calculations in the industrial aplication . The main attention is paid to shell and tube heat exchangers with ROD and disc baffle system and radiation heat exchanger. All of these exchangers are used mainly in process of waste thermic destruction. The theoretical part of the work describes construction details of each heat exchanger and calculation algorithms of these equipments. The practical part of the work applies theoretic calculation alghortims in the industrial aplication which is design and rating. In the final part advantages and disadvantages of results have been assessed for construction and process aspects.
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Plumbing Systems for Baking Plants
Hruška, Jan ; Vrána, Jakub (referee) ; Bárta, Ladislav (advisor)
This diploma thesis deals with plumbing systems of baking plants v Modřicích. The first part looks for a solution exchange of heat and using waste energy from bakery owens. There are performed several possiblities of projects for plumbing systems. Project part was worked out in cooperation with technical company wich produces equipment for bakery factories. The solution according to relevant standards
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Energy performance of air handling units for swimming pool halls
Batelka, Václav ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
The thesis is focused on determining the energy flows and the creation of an internal microclimate swimming pool halls. It describes the problems of design, the potential risks associated with the use of pools and thermodynamic processes heat and mass transfer. For this purpose was developed simulation program, which examines the behavior of heat and humidity in the room depending on external factors. The room can be simulated for any time period and geographic location. The outputs of the simulation are heat and mass balance, which will be covered air condition units. Three variants were designed and optimized solutions comparing claims on their operations. The experimental part is focused on the evaporation of the water. Measurement examines dependence of the speed of evaporation of water at different boundary conditions. Was investigated temperature dependence of water, temperature and relative humidity and air velocity above the water surface.
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Effect of building construction on thermal load of space
Výravská, Zdeňka ; Ell, Jiří (referee) ; Tesař, Zdeněk (referee) ; Rubina, Aleš (advisor)
This master’s thesis focuses on effect of outer building construction on thermal load of space. The effect of translucent and non-translucent construction is discussed. The project of air-conditioning system is prepared for the two alternatives of the translucent construction, including the purchase price of the airconditioning system and glazing and the savings on summer cooling. Afterwards the period of the recovery of investment is calculated. The plan of the airconditioning system is connected to my bachelor’s thesis “Airconditioning in the car showroom”, the subject of which was the plan of the airconditioning system of the car showroom.
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Heating Module for the Electrospinning Electrode
Lukesle, Václav ; Musil, Vladislav (referee) ; Pokorný,, Marek (advisor)
The thesis deals with the principal heating design of the electrospinning electrode. These electrodes are fed with high voltage (tens of kV), which is an essential part of the device for the nanofibres production. This thesis presents the research of possible solutions of the heating and also it analyzes some principles of the nanofibre production. Furthermore, the work presents electrical schematics and PCB of the heating module. The aim of this work is to propose such a solution of heating that makes spinning from melt realizable in the device for 4SPIN ® nanofibres production.
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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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Heat exchanger design
Loukota, Martin ; Lisý, Martin (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with design of tube heat exchanger for preheat the return water to the boiler. Thesis contains description, distribution and requirements of the tube heat exchangers, stoichiometric calculation, geometrical dimensions design, pressure loss and thermal performance calculation. Thesis also includes drawings of the designed exchanger.
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