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Application of the digital image correlation in the measurement of residual stresses by the hole-drilling method
Plucnar, Tomáš ; Horák, Richard (referee) ; Halabuk, Dávid (advisor)
The thesis focuses on the measurement of residual stresses using digital image correlation (DIC). The work describes residual stresses and also derives an analytical description of the deformation around a drilled hole, which is essential for evaluating the experiment. The largest part of the thesis is dedicated to the measurement and evaluation of residual stresses. Within the framework of the thesis, measurements of residual stresses were conducted for samples with pre-drilled holes and also for solid samples into which holes were drilled. These measurements were then used to evaluate the effects of various DIC software settings on the assessed residual stress. Measurements on samples with pre-drilled holes were used to determine the impact of the random pattern density and the influence of the camera on the evaluated residual stress.
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Comparison of Green Façade Systems Based on Experimental Basis Weight Measurements
Vystrčil, Jan ; Chomová, Štěpánka ; Nespěšný, Ondřej ; Šuhajda, Karel ; Bečkovský, David
Green facade systems are gaining attention due to their potential for the urban environment, building aesthetics, and energy efficiency. This study compares different green facade systems and their surface weight, which is one of the critical parameters for performance and longevity. The research evaluates construction, installation, water consumption, and sustainable operation. Experimental measurements of surface weight examine changes depending on water consumption and performance.
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Energy assesment of single family house
Panovec, Jan ; Počinková,, Marcela (referee) ; Hirš, Jiří (advisor)
The aim of this bachelor’s thesis is to understand the nature of the energy assesment of building with low energy demand and energy-saving requirements. The calculations of energy intensity and experimental measurements of chosen parameters of inner microclimate in the building were done. Theoretical part includes requirements and principles of projecting buildings with low energy demand.
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Cleaning of ventilation systems and potential energy savings
Lapáček, Milan ; Rubina, Aleš (referee) ; Máša, Vítězslav (advisor)
The main aim of this thesis is to explore fouling of air ducts and its influence on energy consumption of HVAC systems. The first part focuses on typical parts that create the IAQ in buildings and on evaluating energy consumption of air transportation. The following section deals with the theories of fluid flow, flow regimes and pressure losses that are created as a side effect. The thesis outlines possible methods of assessing the impact of pollution with an emphasis on pressure losses and their influence on the fan power consumption. The actual experimental measurement, conducted in a selected industrial plant, is focused on an influence of cleanness of textile diffuser on HVAC device power consumption. For the further research of this process, measuring equipment with suitable measurement method is designed and constructed.
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SIMULATION OF ENERGY PERFORMANCE AND REAL OPERATION OF BUILDINGS
Šteffek, Libor ; Ingeli,, Rastislav (referee) ; Hirš, Jiří (referee) ; Ostrý, Milan (advisor)
This dissertation thesis primarily focuses on the experimental measurement of energy consumption of a given energy-passive family house as well as theoretical research in the field of energy calculations using computer simulations. The results of quasi-stationary and dynamic simulations, with varying computational and real-time climate data, are compared with experimental measurements. Using the dynamic calculation model, which was validated by actually measured data, the relationship between architectural design and the energy performance of the building was analyzed. The influence of selected different operating modes for heat consumption on heating, cooling, ventilation, and interior overheating is observed. The result of the mutual interaction of several input parameters of variant solutions provides the basis for optimization of the whole design.
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Air Distribution in residence ventilation system
Štencel, Bedřich ; Rubina,, Aleš (referee) ; Rubinová, Olga (advisor)
My thesis is divided into three separate parts. The first part is devoted to the theoretical part of the ventilation systems. The second part deals with the determination of the conditions for a number of air exchange, a comparison of three variants of the location of air outlets in dwelling units and the application image airflow from experimental measurements on the common room. The third part is focused on the description of the experimental tasks in the laboratory at the Institute building services.
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Outdoor environment imact on indoor room quality
Zemánek, Jan ; Horák, Petr (referee) ; Rubinová, Olga (advisor)
This thesis deals with the quality of the external and internal environment and the possibility of interaction. Resolves components, pollutants and sources of pollutants that are contained in the external and internal air and thus influence around us all. The theoretical part describes the resources, limit concentration or additional filtering of the individual substances. Are summarized in detail the possibility of air exchange and ventilation in buildings intended for public gatherings. Another part of the treatment methods solve indoor environmental quality (grade of primary school) according to the changes of air flow, ventilation options and the impact of external environment on indoor air quality. It also includes a proposal for forced ventilation of the building of the school. In the experimental part, I focused on the evaluation of the concentration of carbon dioxide in the external and internal environment and the possibilities of noise pollution. In conclusion, there are variants commented and evaluated.
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Creating a microclimate of an industrial building with high demands on its uniformity
Tůmová, Eliška ; Gebauer, Günter (referee) ; Šikula, Ondřej (advisor)
This diploma thesis deals with the optimization of microclimate of an industrial building. There is required constant temperature with minimal fluctuations during manufacturing process in the building. Due to insufficient cooling power of air-conditioning system was objective to design a solution that ensures stability of internal temperature during production especially in summer and simultaneously should be the solution economically acceptable. Simulation shows original state defined problems. Some new or unusual materials for solar shading are reviewed in the thesis by the experimental measurements and by the comparative method. To each material is assigned shading coefficient according to Czech standards, thereby is achieved universality for calculations of heat gains resulting from solar radiation. By one part of the experiments and their evaluation is determined thickness of the standard single glass glazing. It is also determined proportional transmittance of solar radiation for certain multiwall polycarbonates, which are currently used as fillers of industrial skylights and production hall‘s window openings. From experiments resulting design is subjected to the simulation. Comparison of temperatures is shown for the time before the installation of designed solar shading and after the installation of the solar shading.
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Design of selected details of concrete structures reinforced with composite reinforcement
Vašátko, David ; Lyčka, Lukáš (referee) ; Girgle, František (advisor)
The aim of this master thesis is to explore and describe behavior of slab in punching shear. In total four concrete slabs were experimentally tested; each being reinforced differently. Using real experiments, there was a possibility to observe different behavior of steel and FRP reinforcement, eventually even the effect of adding FRP stirrups on load-bearing capacity. For the purpose of experimental testing design, currently placed formulas used to determine punching shear capacity were adjusted for application on longitudinal and shear FRP reinforcement. Atena software was used to approximate behavior of specimens by performing a nonlinear analysis. After the results of loading tests were obtained, next step was the comparison of design approaches and comparison of behavior of nonlinear model to a real specimen. In practical part, design of locally supported slab with requirement of non-magnetic reinforcement took place.
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Reflective insulations for effective use in low energy buildings
Kalánek, Jiří ; Ingeli,, Rastislav (referee) ; Šťastník, Stanislav (referee) ; Ostrý, Milan (advisor)
The dissertation thesis is focused on thermal insulating properties of reflective insulation under boundary conditions typical for low-energy buildings. In the introductory part of this thesis the attention is focused on the heat transfer process. There is described primarily heat transfer by radiation. There is also described the reflective insulation and the methods of determination their thermal performance. The remaining part of the thesis deals with the analysis of the results obtained in experimental measurements. Measurement results are compared with the calculation model. Conclusions for technical practice including possibilities of further research are summarized in the final section.
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