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Design of air conditioning in the family house
Němcová, Aneta ; Jelínek, Ondřej (referee) ; Blasinski, Petr (advisor)
The subject of this dissertation is the design of an air conditioning system for a family house. The design contains the actual state, in which a central unit with variable air volume regulators and air supply adjustment is designed. The first version of optimisation offers a simple central ventilation, and in the second version a decentral ventilation for the object. These options were compared based on their purchasing price and additionally from the interior comfort feel point of view. In the next part a long-term measurement of an energy recovery ventilation was performer, and data was processed to evaluate and compare the efficiency with efficiency promised by producer.
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Energy performance certificate of residential building
Němcová, Aneta ; Horká, Lucie (referee) ; Horák, Petr (advisor)
The bachelor thesis deals with the evaluation of the energy performance of the residential building in Letovice. The theoretical part is about thermal systems, especially the district heating. In the computational part, it compares the energy needs and flows of the baseline building with the newly designed state. The result is two passes of both states inserted into part C – the PENB project.
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FAMILY HOUSE IN DRÁSOV
Němcová, Aneta ; Kalužová, Alena (referee) ; Pěnčík, Jan (advisor)
The aim of the project is a new building for housing in the Drásov in the catastral area Drásov. It is designed for a family of four members. The building has three floors, two of which are above-ground and one underground. Storage are located at underground, rooms for living, technical rooms and garage are located at first floor. There are rooms for living at the second floor.There is a sloped shed roof. The house has an terrace made of concrete pavement. It is accessible from bedroom and bathroom. The building site is situated at mild terrain.
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Research and Development of Technology for Surface Layers of Roll and Sliding Bearings Components
Němcová, Aneta ; Klakurková, Lenka (referee) ; Doležal, Pavel (advisor)
To increase of bearing steels properties are research and development of surface modifications well above dedicated, in present. Basic requirements to the surface modifications are high wear resistance and good temperature resistance (origin by friction). Surface modifications can not negatively influence properties of bearing steels as a substrate. One of the possibilities can be used surface modifications used for high temperature applications. These are based on saturation of substrate surface layer by Al (and Si) elements. This work deals with preparing of Al and Al-Si diffusion layers from slurries on 100Cr6 bearing steel surface and study of elements interaction between coating and bearing steel as a substrate during proceeding of protective layers at high temperatures. To elements interaction study light microscopy, scanning electron microscopy equipped by energy dispersive microanalyses, glow discharge optical emission spectrometry and microhardness measurement methods were used. To the evaluation of layer thickness image analyses was used.
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The effect of the season on the thermal stability in the indoor environment
Němcová, Aneta ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
This work deals with the issue of shading coefficient of external blindsand its dependence on environmental phenomena. The aim of the thesis is to find an optimal solution for forming of inner environment according to the shading coefficient of external blinds shading element. The computer software of Teruna for creating a mathematic simulation of rooms in the assigned detached family house. The conclusion contains the recommendation of building alterations for the detached family house which I designed in my bachelor´s thesis.
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FATIGUE CHARACTERISTICS OF MODIFIED MAGNESIUM ALLOYS AFTER CORROSION DEGRADATION
Němcová, Aneta ; Očenášek, Vladivoj (referee) ; Hadzima, Branislav (referee) ; Pacal, Bohumil (advisor)
This doctoral thesis deals with the determination of the influence of plasma electrolytic oxidation (PEO) on fatigue behaviour of extruded AZ61 magnesium alloy in air and in the 3.5% NaCl solution. The coatings were formed in the silicate-phosphate electrolyte under pulsed current conditions at a frequency of 50 Hz. The influence of current density on coating formation was examined under current densities of 70, 130 and 200 mA cm-2 for different durations up to a maximum of 1800 s. 8 g dm-3 of KF were added to the electrolyte to study the influence of fluoride ions in plasma electrolytic oxidation. It is shown that fluoride ions inhibit localised oxidation in the initial stage of the process, associated with the secondary particles based on Al–Mn. The presence of fluoride also modified the sparking characteristics, decreased the rate of coating growth and changed the morphologies of the coatings. The influence of fluoride on the coating hardness, and the corrosion resistance of the alloy during exposure to salt spray, was negligible. Based on previous optimised PEO conditions, coatings formed under a current density of 130 mA cm-2 for 300 s in the electrolyte containing KF were chosen for fatigue testing. The high-cycle fatigue tests were carried out on cylindrical samples under a force controlled sinusoidal tension-tension cycle with asymmetry parameter R=0. The experimental data were fitted with Kohout & Věchet function. The fatigue limit of uncoated alloy in air for 107 cycles was determined at 145.4 MPa and the combination of PEO coating with chloride ions caused a reduction of ~55 %. Attention was paid to the fatigue crack initiation in different conditions of cyclic loading. The fracture surfaces underwent detailed fractography analysis including secondary crack observation on the gauge length. The contribution of Al–Mn particles were confirmed on the uncoated alloy in air and the presence of chloride ions were observed as another influential contributor to local corrosion attack. The cyclic loading caused spalling of the outer layer, and the multiple initiation was observed on PEO coated alloy, caused by cracks in the coating and stress transferring to the alloy.
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Design of air conditioning in the family house
Němcová, Aneta ; Jelínek, Ondřej (referee) ; Blasinski, Petr (advisor)
The subject of this dissertation is the design of an air conditioning system for a family house. The design contains the actual state, in which a central unit with variable air volume regulators and air supply adjustment is designed. The first version of optimisation offers a simple central ventilation, and in the second version a decentral ventilation for the object. These options were compared based on their purchasing price and additionally from the interior comfort feel point of view. In the next part a long-term measurement of an energy recovery ventilation was performer, and data was processed to evaluate and compare the efficiency with efficiency promised by producer.
|
|
|
Energy performance certificate of residential building
Němcová, Aneta ; Horká, Lucie (referee) ; Horák, Petr (advisor)
The bachelor thesis deals with the evaluation of the energy performance of the residential building in Letovice. The theoretical part is about thermal systems, especially the district heating. In the computational part, it compares the energy needs and flows of the baseline building with the newly designed state. The result is two passes of both states inserted into part C – the PENB project.
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The effect of the season on the thermal stability in the indoor environment
Němcová, Aneta ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
This work deals with the issue of shading coefficient of external blindsand its dependence on environmental phenomena. The aim of the thesis is to find an optimal solution for forming of inner environment according to the shading coefficient of external blinds shading element. The computer software of Teruna for creating a mathematic simulation of rooms in the assigned detached family house. The conclusion contains the recommendation of building alterations for the detached family house which I designed in my bachelor´s thesis.
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