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Family house in passive standard
Svoboda, David ; Jelínek, Petr (referee) ; Sedlák, Jiří (advisor)
The bachelor's thesis on a topic “The family house of standard passive” deals with the design of the house for family housing in accordance with applicable legislation. The house is designed in the Highlands on the edge of developing area Račerovice. The cellarless two-storey building is made of brick. The roof is according to local regulative plan made up of saddle-shaped truss system. The passive character of the house requires large glass areas on the south facade of the house and high-quality thermal insulation of the building envelope with minimal losses. The house is associated with a brick garage with a shed-roof.
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Efficiency Improvement of Small Induction Motors
Vilím, Martin ; Veselka, František (referee) ; Hájek, Vítězslav (advisor)
In this bachelor´s thesis I discuss about asynchronous engines in general, describe their construction and principle of operation, using. It also includes measurements of a specific motor and design engine. The first part deals with theprinciple of the engine options including the fundamental control over speed and torque. The second part deals with the measurement of the size of the searchengine and losses. The last part provides a proposal for a new induction motor.
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Automotive Alternator Innovation
Volek, Martin ; Hýsek, Roman (referee) ; Hájek, Vítězslav (advisor)
The work deals with the analytical electromagnetic design of automotive claw-pole alternator 14V/120A. This design is verified in program Maxwell with a RMxprt tool. The results of both calculations are compared. Designed alternator is also compared with the results measured in the laboratory on the alternators of similar type. Furthermore, there are analyzed individual power losses of machine and listed options of reducing these losses, which results in an increase in overall efficiency.
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Computational modeling of radial hydrodynamic bearings for water machines
Pokorný, Jan ; Šimek,, Jiří (referee) ; Návrat, Tomáš (advisor)
The aim of this thesis is to calculate the stiffness and damping coefficients for radial hydrodynamic bearings. Cylindrical and lemon hydrodynamic bearings are considered. The solution to this problem mainly depends on the hydrodynamic pressure in the bearing. The numerical solution of the Reynolds equation is used to calculate the pressure. The effect of variable viscosity and density of the lubricant due to temperature changes is considered. The static equilibrium position of the journal centre is also solved. The stiffness and damping coefficients are determined using small amplitude journal motions about the equilibrium position. Three methods for determining these coefficients are presented. The outcome of this thesis is an algorithm for the calculation of stiffness and damping coefficients for cylindrical and lemon bearings. Results for lemon bearings are presented and comparison with the commercial software DynRot BR is made. The benefit of this thesis is the creation of an algorithm for the calculation of journal centre equilibrium position, a new way of incorporating the temperature changes in the viscosity and the density of the lubricant, and the modification of a method for calculating stiffness and damping coefficients based on experimental analogy.
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Design of synchronous linear motor thermal network
Čech, Jan ; Toman, Marek (referee) ; Knebl, Ladislav (advisor)
The first part of this thesis deals with the study of linear motors. The introduction of the thesis deals with the brief description of the linear motor, including its accessories. This part explains principle of linear motors, their general advantages and disadvantages. The next section contains an overview and division of the currently used linear motors. The second part deals with the theoretical description of forms of heat transfer. The third part of the thesis deals with the design of an equivalent thermal circuit model of a linear iron-core linear motor with permanent magnet. Hereafter, the proposed design will be used to calculate the temperatures of the individual motor units. The temperatures are later compared with the results obtained with finite element method.
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The Material Flow Production System Analysis and Improvement Proposals
Marešová, Petra ; Kuruc, Miroslav (referee) ; Bartošek, Vladimír (advisor)
This thesis focuses on the analysis material flow of the production system at ABB Ltd. and suggestions for improvements. The work consists of theoretical, analytical and design parts. The theoretical part contains the basic concepts of production. In the analytical part, there is described a current situation in production areas of the company on the basis of theoretical knowledge. In the final part, the solutions are designed to help improve the business.
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Airconditioning of the house to the medical service
Vytasil, Michal ; Jelínek, Ondřej (referee) ; Rubina, Aleš (advisor)
This bachelor's thesis deals with the design of air conditioning equipment in the house to the medical service. The solution is the basement floor with a waiting room, reception and sanitary rooms and 1.NP with surgery. Heating load of part of the basement is completely drained air handling units, in other rooms are used sub-system with fan coil units. Sanitary rooms are exhaust ventilation ceiling-suspended equipment. In the theoretical part of the thesis focuses on the bypass factor, surface temperature of the heat sink and their effect on the dehumidification.
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Automobile Charging System
Kovačík, Lukáš ; Janda, Marcel (referee) ; Hájek, Vítězslav (advisor)
This Bachelor thesis analyzes recharging systems in automobile. It explains main components of electric circuit used in automobile alternators, functions of each part of the alternator, comparison of the most common types of alternators. Main focus is to analyze and inovate the area of power losses, which determines the efficiency of each type. Final part of this thesis describes the analytical calculation of a three-phase generator.
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