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Effect of clay plasters application on heat storage
Koukalová, Pavla ; Vlach, František (referee) ; Bečkovský, David (advisor)
The aim of this master thesis is a research of effects of clay plaster application and natural ventilation on heat storage of a room. In addition to theoretical analysis of basic characteristics of clay as material used in the field of civil engineering, an experimental verification of these characteristical features is carried out as well. The thesis also studies thermal comfort of a room in terms of humidity and concentration of CO2 in dependence of natural ventilation. In the last part, numerical verification of effects of clay plaster application on heat storage is calculated using Simulace 2015 software.
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Stability of soil organic matter and humic substances
Nováková, Šárka ; Enev, Vojtěch (referee) ; Klučáková, Martina (advisor)
This diploma thesis is focused on changes of stability in organic matter by extraction in different agents. Two soils of a different type and isolated humic acids were used for stability determination. Extraction agents were selected usually used for soil metal extraction, and a changes in the structure of the organic matter was observed. Samples were characterized using FTIR analysis and elemental analysis, the extracts were measured by UV-VIS spectroscopy, absorption ratios E2/E3, E4/E6 were discovered, dynamic light scattering were determined for particle size distributions. Next part of the thesis was the assessment of the change of thermal stability using thermogravimetric analysis and differential scanning calorimetry, degradation temperatures of the extracted samples were discovered and compared with the original samples.
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Polyfunctional house
Kuklová, Jana ; Pilný, Ondřej (referee) ; Berková, Petra (advisor)
The main aim of the thesis is to design a new building of the mixed-use building in Brno. The building consists of two parts. One part consists of shops. The second part consists of offices and conference space. It is a building that has three floors above ground and one underground. In the basement there are a facilities and a garage. Shops are designed on the ground floor. There are offices on the second floor. Conference rooms are on the third floor. The building has a flat roof. The vertical load-bearing structures are designed from Porotherm ceramic blocks. In the core of the building, the vertical load bearing structures are designed as monolithic reinforced concrete walls. Columns are used in the building for the possibility of open space. The masonry of the basement consists of white bathtub. The floors are designed as folded from the Spiroll system. Internal non-load-bearing walls are designed from gypsum board with double cladding. The second part of the work deals with forced ventilation, cooling and central heating. In the third part of the project I deal with acoustics. The project was carried out in the Auotocad program. All constructions comply with valid standards and regulations.
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Chemical and thermal stability of humic complexes
Nováková, Tereza ; Pospíšilová, Ľubica (referee) ; Klučáková, Martina (advisor)
The aim of this diploma thesis was the study of relation between chemical and thermal stability of complexes of humic acids with heavy metals, namely nickel, cobalt and copper. Complexes were prepared with metal solutions of three different initial concentrations. Through UV-VIS spectrophotometry were determined adsorbed amounts of incorporated metal ions in the structure of humic acid; it was affirmed that amount of bounded metal ions increases with increasing initial concentration. Chemical stability was determined as an amount of released metal ions, two of extraction agents were used (solution of MgCl2 and HCl), total bounded amount was distribute into three different fractions; residual fraction, strongly bound fraction and mobile and ion-exchangeable fraction. Changes that occured in the structure of humic acids after complexation and extraction were investigated by FT-IR spectrometry. Thermo-oxidative stability was tested through thermogravimetric analysis (TGA) and differential scanning calorimetry. The results of this diploma thesis has showed comparision of complexes of two different humic acids. They have confirmed an impact of each metal ion on thermo-oxidative stability of humic acids. The relation between chemical and thermal stability was compared through correlation of data obtained by these methods.
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The indoor environment of Kindergartens in terms of Building physics requirements
Jechová, Marie ; Krupica, Roman (referee) ; Bantová, Sylva (advisor)
The thesis titled "The indoor Environment of Kindergartens in Terms of Building Physics Requirements" addresses the challenges associated with ensuring thermal comfort in the indoor environment, while simultaneously providing adequate lighting and daylighting for the classrooms of kindergartens. The thesis is structured into interconnected and complementary sections. The first section dissects the identified problem, establishes legislative requirements, outlines research methods, and defines the objectives, which will be assessed in the conclusion. This section also includes the definition of the kindergarten object in accordance with current legislation. Furthermore, the issues of lighting and daylighting are explained from the perspective of applicable laws, regulations, and standards, incorporating all necessary variables, graphs, formulas, calculations, and definitions. Similarly, subsequent chapters will elaborate on the thermal comfort of the indoor environment. The final section of the theory provides an overview of simulation and computational software tools, employed to model different scenarios, compare the current and proposed conditions, and draw conclusions for the thesis. The practical section follows, focusing on the design of window openings, shading methods, and ventilation regimes to meet the requirements for daily lighting and daylighting while adhering to the maximum indoor air temperature in line with normative requirements. Experimental measurements of essential input data for assessing the thermal stability of the indoor environment were conducted during summer months in the existing facility. In the concluding part of the thesis, conclusions will be drawn regarding the ratio of floor area of transparent parts of building envelopes to the floor area of the classrooms. This is done to ensure compliance with legislative requirements concerning both thermal and lighting comfort in the indoor environment. The conclusion also summarizes potential measures to achieve the desired parameters and outlines a prospective solution to the addressed issues.
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