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Bank Air Conditioning
Grbál, Jakub ; Rubinová, Olga (referee) ; Uher, Pavel (advisor)
This bachelor's thesis deals with the designing of air-conditioning in the bank building. In the theoretic part of the work I present the principle of ventilation and air conditioning. My work describes the advantages and disadvantages of the single systems. The result of the calculation part is the design of the optimum air-conditioning system for the drawing of thermal load in the summer period.
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Individual ventilation system with recuperation
Hrabánek, Radek ; Zerzaňová, Alena (referee) ; Hejčík, Jiří (advisor)
The diploma thesis is consisting of theoretic part, which deals with used ventilating systems, describes basic types of air-conditioning systems and basic characteristics and diversification of radiant cooling systems. Following part attend to design of ventilating system and radiant cooling system for cooling of the flat. Design of the ventilation systém is based on minimum air flow per person. Design of the radiant cooling system is based on calculation of thermal loads. Design documentation is part of the diploma thesis as well as the calculations made in excel.
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Nonlinear analysis of continuous welded rail in curves of small radius
Murínová, Klára ; Szabó, Petr (referee) ; Plášek, Otto (advisor)
The diploma thesis examines the influence of curve radius on continuous welded rail stability in a small radius curve. Attention is paid to curves with a radius less than 300 m. The first part of the thesis summarises the theory of continuous welded track and influence of track parameters on track stability. The second part of the thesis deals with constructing of the numerical model of a curved track with the observed behaviour of track under thermal loading with positive and negative temperature values. The variable values in the model are rail shapes and different radius. In the end, the shape of the track lateral deflection as a function of temperature are evaluated.
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Advanced Methods for Damage Evaluation of Boiler Tube Bundles
Naď, Martin ; Odstrčil, Miloslav (referee) ; Jůza, Zdeněk (referee) ; Jegla, Zdeněk (advisor)
This thesis is focused on the application of advanced methods for evaluating damage to boiler tubes, specifically temperature related damage. The aim of this work is to develop an improved damage evaluation procedure utilizing capabilities of modern approaches. This work describes various types of industrial boiler damage. The main focus is on the most exposed and often the most damaged parts of boilers, which are tube bundles (for example, superheaters). Equipment damage is undesirable and often leads to leakages or even to the boiler shutting down. Therefore, it is necessary to find the problem as soon as possible and make the required changes to prevent further damage. The damage types are divided into five categories based on the damage mechanism. Temperature has one of the biggest influences on damage and it may cause short-term or long-term overheating in the tube bundles. This type of damage occurs when the designated temperature is exceeded and results in reduced creep life. It is necessary to know the real surface temperature history of the tube bundle to estimate temperature related damage, however this is often not available. Therefore, it is necessary to calculate those temperatures based on the available data (i.e. inlet and outlet temperatures and pressures). This is real challenge due to the combination of complex flows of the working substances (mainly flue gasses) and heat transfer. Considering available data, new approach is proposed in order to obtain information required for residual creep life estimation. In the first step, thermal – hydraulic calculation is performed followed by a thermal load estimation of a superheater tube bundle in a natural gas fired boiler, using CFD simulations. In the next step, the surface temperature is evaluated and used to determine the temperature related damage, specifically the creep life estimation. The life expectancy is in some ways influenced by imperfections, and therefore at the end of this thesis the influence of the oxide layer on the inner side of tube and fouling on outer side of tube is described.
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Comparison of dynamic modulus of elasticity repair materials exposed to thermal stress
Munduchová, Markéta ; Jakubík, Aleš (referee) ; Brožovský, Jiří (advisor)
Diploma thesis is composed of theoretical and practical part. In theoretical part there are findings related to structure changes of concrete exposed to high temperatures. Models used to simulate high temperature exposure of concrete are described in this thesis. Evaluation of internal structure damage is appropriate by using non-destructive methods, which determine dynamic modulus of elasticity in compression and tension. These methods includes ultrasonic impulse method and resonation method and therefore research was made of articles contains these methods. In experimental part of diploma thesis the test specimens was made from repair materials from UTHD and commercially produced repair materials. The test specimens were subjected to thermal load: 200, 400, 600, 800 °C. Damage of internal structure was examined by ultrasonic impulse method and resonation method.
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The influence of microclimate on the inside glass objects
Dvořáková, Hana ; Ell, Jiří (referee) ; Rubina, Aleš (advisor)
This master thesis deals with the influence of glazing on the microclimate inside buildings. In particular, I focused on the shading coefficient and the various factors that affect it. The thesis also concentrates on the origin and composition of the solar radiation, the formation of thermal stress and refraction. In the next part of the thesis, I focused on designing two variants of shielding factor and its impact on the thermal load of gym, sports hall and the related necessary changes. The last part of the thesis deals with experimental measurements of incident solar radiation passing through the window into real physical model. From the measured values, we determined realistic shading coefficient and then applied it in the previous section of this thesis.
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Air conditioning in the wellness-center
Zerzońová, Karolína ; Rubinová, Olga (referee) ; Blasinski, Petr (advisor)
Bachelor thesis deals with the design of air conditioning equipment for the Wellness-center at pension in Malenovice. The thesis is divided into 3 parts. In the first of them, the thesis work deals with the theorical part. The theory is focused on the division of atmospheric air filters info different categories, pocket filters and their types of media and design. At the end, the theoretical part deals with the mechanism od filtration, separation, filtration efficiency and pressure losses. The second part of this bachelor thesis is mainly about the design of the air handling unit. There are three units designed for a building. Unit no. 1 is for a wellness, unit no. 2 for sanitary facilities and unit no. 3 for the fitness. The thesis deals with the transport of fresh air to the interion of selected rooms and coverage of water gains from whirlpools, humidity adjustment, heat gains during the summer and heat losses in the winter. The last part deals with project documentation.
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Deformation and damage of tube bundle bends due to temperature
Michálková, Anežka ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
This master’s thesis deals with the problem of determining the thermal load of cross-flow tube bundle bends in steam superheater. Firstly, the theoretical basis of computational fluid dynamics and finite element method is introduced, and the possible methods of creep damage evaluation are presented as it was assumed that creep damage would be the most significant damage mechanism. The next part of this thesis describes simulations in ANSYS Fluent to determine values of heat transfer coefficients and ANSYS Mechanical to obtain temperature field and stresses. Based on the determined temperature field and stresses, a creep lifetime calculation according to ČSN EN 12952-4 is performed. Then creep design check for operating time 200 000 hours was carried out according to ČSN EN 13445-3. It was determined that in this case the tube bends are not the critical spot in comparison with the straight sections of tubes.
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Air conditioning in the sports center
Měcháčková, Martina ; Jelínek, Ondřej (referee) ; Blasinski, Petr (advisor)
The topic of the work is the design of air handling units in a sports center. The thesis is divided into 3 parts. The first part deals with theory. It focuses on indoor swimming pools and their inner microclimate, humid air, dehumidification, and the design of units for spaces with increased level of humidity. The second part is mainly about the design of the air handling unit. There are three units designed for a building; unit no. 1 for a tennis court, unit no. 2 for sanitary facilities, and unit no. 3 for the indoor swimming pool. The last part deals with project documentation.
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Nonlinear analysis of continuous welded rail in curves of small radius
Murínová, Klára ; Szabó, Petr (referee) ; Plášek, Otto (advisor)
The diploma thesis examines the influence of curve radius on continuous welded rail stability in a small radius curve. Attention is paid to curves with a radius less than 300 m. The first part of the thesis summarises the theory of continuous welded track and influence of track parameters on track stability. The second part of the thesis deals with constructing of the numerical model of a curved track with the observed behaviour of track under thermal loading with positive and negative temperature values. The variable values in the model are rail shapes and different radius. In the end, the shape of the track lateral deflection as a function of temperature are evaluated.
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