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Impact Assessment of Selected Parameters of Residential Buildings on Their Energy Performance
Vendlová, Lucie ; Rubina, Aleš (referee) ; Kabele,, Karel (referee) ; Papež,, Karel (referee) ; Hirš, Jiří (advisor)
The work deals with the impact assessment of selected parameters of residential buildings on their energy performance. Within the application of the theory of statistics database of selected residential buildings is analyzed in terms of different features that characterize it. In particular, the thermal insulating properties and individual sub-items in the energy balance are analyzed. Then the measured rate dependence of selected parameters affecting energy performance is examined using correlation and regression analysis. The results are applied in the development of computational tools for evaluating energy flows in the building.
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Wind energy
Král, Ondřej ; Brázdil, Marian (referee) ; Kracík, Petr (advisor)
This bachelor’s thesis discuss wind energy sector. The first chapter focuses on basic construction types of wind power plants, their classification and description of the main parts. Basic physical principles by which electrical energy is produced, presents the next section, which deals with the lifetime of wind turbines, too. The final chapter describes the development of wind power in history, wind energy is here compared with other energy sources, and finally it is dedicated to matter of wind turbines’ energy payback.
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Energy Performance of sewerage networks
Žďára, Jan ; Hluštík, Petr (referee) ; Raclavský, Jaroslav (advisor)
First section of this master thesis is background research of energy demand of sewer systems. Intrudoctory chapter explains basic concepts. Second chapter is dealing with Czech and European legislation concerning energy consumption of water service. Third chapter describes energy demand of sewer systems. In this chapter there are described conventional gravity, vakuum and pressure sewer systems and components with major power consumption. Fourth chapter describes actual state of energy demand of WWTP and possible ways of improving power consumption of WWTP. Second section is a review of energy consumtion of vacuum systems of five different municipalities including one WWTP. Measured and evaluated outputs were used to create energy audit methodology for sewer systems.
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Energy efficient mountain chalet
Hartman, František ; Vlach, František (referee) ; Bečkovský, David (advisor)
This diploma thesis deals with project energy efficient mountain chalet. The building is located in the Krkonoše national park, near by highest Czech mountain named Sněžka. Object is located on plot number 899 in the cadastral Pec pod Sněžkou, on the site of the initial ,,Giant” chalet. The aim of this thesis is proposal of energy efficient mountain chalet in extreme climate conditions, such as in the mountain area, at the elevation 1378 m. Proposal of the chalet emphasis is on achieving maximum energy self-sufficiency. The building consists of two objects SO 01 and SO 02 interconnected by the roof. The total built-up area is 191.39 square meters. The accommodation capacity is 20 people.
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Energy performance of kindergarten
Mahovská, Adriana ; Vyhlídalová, Karolína (referee) ; Horák, Petr (advisor)
The bachelor’s thesis elaborates two energy performance certificates of kindergarten in the variant for the current status and the new state. The theoretical part deals with solar collectors. Computational part contains specification of building structures and power systems. It always includes a comparison of the default and the new state. The economic assessment is determined by the return on investment in revitalization. As part of the mandatory analysis of alternative sources, a proposal for a solar system for partial hot water heating will be established. The project part contains two processed EPCs (building energy performance certificate) for this building.
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Calculation of Energy Performance of Buildings
Hartman, František ; Maurerová, Lenka (referee) ; Hirš, Jiří (advisor)
This bachelor´s thesis in the first part deals with changes of energy assessment of the building by introducing decree 78/2013 and compares it with the previous decree 148/2007. In the next part are specified energy systems entering the calculations and individual computing procedures for determining the energy requirements for individual HVAC systems. In the last part is calculation of the energy performance of the building. As an evaluation mechanism was chosen, the energy performance certificate. There were dealt different variants of calculations in terms of data input. The results are shown in the comparative charts and diagrams.
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Hydrostatic bearings for wind energetics
Procházka, Michal ; Foltýn, Jan (referee) ; Michalec, Michal (advisor)
This bachelor thesis deals with the bearing of the main rotor shaft of a wind turbine using hydrostatic bearings. Wind turbines come in many designs and the thesis then determine the operating parameters and bearings used in horizontal axis turbines of different installed power outputs. Currently, repairs, as well as servicing of bearings, are very costly and affect the operation of the entire power plant. Hydrostatic bearings offer advantages that could reduce the failure rate of wind turbine bearings. The operating parameters of turbines of different outputs were used to calculate the selected hydrostatic bearings. The results shows that the use of this type of bearings is possible for turbines with different power outputs, but higher efficiency is estimated for larger turbines (for example 8 MW turbine). The energy consumption of bearing, required to drive the hydrostatic bearings, reaches 0,03 % of the total output, compared to 0,39 % for the smaller 55 kW turbine. The calculation has been simplified in the initial energy performance estimation and further steps could include bearing geometry optimization or extending the operating parameter range of the wind turbines.
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Energy performance of building
Horváth, Gábor ; Janík, Zdeněk (referee) ; Kalousek, Miloš (advisor)
The aim of the master´s project is to design a nearly-zero energy veterinary clinic in Ostrava. The building has two above-ground floors. On the first floor there is a reception, a waiting room and surgery rooms. On the second floor there is a laboratory, a physiotherapy and hydrotherapy rooms, stomatology office and two surgery rooms, a radiography and a CT. The project consists of three main parts. The first part presents the architectural and structural design of the building. The building has concrete foundations. The vertical load-bearing structures are designed from sand-lime blocks, and non-bearing structures are designed from plasterboards. The external walls are covered with thermal insulation and a ventilated facade. The horizontal load-bearing structure and the staircase are designed from reinforced concrete. The building has a pitched roof formed by truss girders. The second part includes the design of building services: lightning, rainwater management and ventilation, heating, cooling and photovoltaic systems. The last part deals with the thermal assessment of selected assembly details. The project is developed in software Allplan, DEKsoft, Building design, SketchUp, Lumion.
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Apartment building
Kolodzej, Ján ; Heřmanová, Jana (referee) ; Brukner, Bohuslav (advisor)
This diploma thesis deals with a project for apartment building. The building is situated in small town in municipality of Hodonín. This object has one undergound level with parking space, ground floor with two commercial units and two upper floors with apartments. Apartments are situated on second and third floor, there are twelve apartment units, six on each floor. The roof is designed as green grass roof. The main goal of this thesis is to desing a polyfunctional apartment building in passive standart by using of CLT panels. The building consists of objects SO 01 apartment building and SO 02 hard surfaces.
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Hydrogen vs. electricity - comparison of energy performance of EV powertrains
Šándor, Kristián ; Mišík, Ondrej (referee) ; Fišer, Jan (advisor)
The topic of emission reduction and the increase in the share of energy produced from renewable sources remains actual and highly discussed in 2021. It was the major reason why I chose to compose this bachelor’s thesis, in which I aim to critically evaluate and compare the energy performance of an electrical vehicle and a hydrogen vehicle. The theoretical part of the thesis outlines the aforementioned drivetrains as well as the plug-in hybrid drivetrain. The practical part of the thesis focuses on calculations of the energy performance of the drivetrains for the year 2021 with a rational estimate for 2050. The methods of electricity and hydrogen production are crucial for energy performance evaluation. Data shows that electric cars operated in countries with a high share of energy produced from renewable sources are the least energetically demanding. On the other hand, if the energy production depends predominantly on fossil fuels, it is more efficient to operate a hydrogen vehicle. Calculations show that when considering the indirect emissions during the operation as well as the energy performance, the plug-in hybrid vehicles are the least efficient. The difference in efficiency between electric and hydrogen vehicles varies depending on the mode of energy production of that specific country. The conclusion of this thesis also discusses advantages, disadvantages and technological challenges concerning the aforementioned drivetrains.
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