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Design of a PV plant for a family house
Kalousek, Stanislav ; Vaněk, Jiří (referee) ; Jandová, Kristýna (advisor)
This bachelor thesis deals with the design of a photovoltaic power plant in combination with a heat pump for a family house. The theoretical part of the thesis includes a detailed analysis and analysis of currently used photovoltaic and heat pump technologies with the use of possible government subsidy programs. Furthermore, the practical part describes the layout of the family house for which both systems are proposed. Based on the knowledge gained, the design of the heat pump and photovoltaic power plant is proposed, including a system for the storage of electrical energy or the sale of surplus to the distribution grid. In addition, a simulation of the operation of the PV power plant is performed in the professional design environment PV*Sol Premium, including a 3D model, module shading, economic and energy analysis of the PV power plant design. Finally, an evaluation of the combination of a PV plant with a heat pump and a comparison with a commercial design from a professional PV and HP installation company is made.
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Microbiome of smear ripened cheese and its changes in dependence on the stages of production
Jandová, Karolína ; Mikešová,, Martina (referee) ; Trachtová, Štěpánka (advisor)
The theoretical part describes soft smeared cheeses, then deals with the technology of manufacturing said cheese with importance on the development of microbiome and describes the most commonly wanted microorganisms and contaminants. Shortly also deals with legislation requirements on the microbial quality of these chesses. The experimental part studies the development of microbiome and contamination by fungi of soft smeared cheese. Firstly, samples were collected in manufacture from each step of manufacturing. In the first part, microbial and microscopical assessment was done. In the second part, DNA was isolated from samples by a commercial kit and phenol-chloroform extraction. The concentration and purity of isolates were determined by spectrophotometry. By qPCR of the DNA isolates the main microbiome and contamination by fungi were examined. As part of the microbial and microscopical assessment, the expected bacteria were determined, and several species of yeast were found, instead of the expected one. Mold contamination was also found. Using molecular diagnostic techniques, the presence of bacteria, yeasts, fungi and the genera Brevibacterium and Candida was proved.
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Design of a photovoltaic power plant for a family house in Opava region
Pekárek, Marek ; Jandová, Kristýna (referee) ; Vaněk, Jiří (advisor)
The bachelor thesis covers the design of a photovoltaic power plant with battery storage for a family house. In the theoretical part is mentioned principles of photovoltaic effect and the function of photovoltaic cells. The work deals with the description of the photovoltaic panels and entire systems of photovoltaic power plant used nowadays. Theses includes informations on legislative conditions and available subsidies related to the installation of photovoltaic power plants in the Czech Republic. In next part of the thesis, I focus on the design of a photovoltaic power plant for a selected family house with a measured annual energy consumption. The system design methodology includes calculation of the required power output of the plant, selection of the appropriate panel placement, component selection, and design of electrical wiring. The work also includes an economic analysis and a calculation of the return on investment, considering the available energy products from energy suppliers in the Czech Republic.
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Solar irrigation design for a tropical greenhouse
Straňák, Rastislav ; Vaněk, Jiří (referee) ; Jandová, Kristýna (advisor)
The aim of this master’s thesis is to create a solar irrigation system for a tropical greenhouse under the organization Lužánky – středisko volného času. The work initially focuses on examining the current state of the greenhouse as well as various possibilities for its automation in relation to generating electricity from renewable sources. The proposed device, consisting of an integrated circuit board, is powered by a solar panel and includes external peripherals such as artificial lighting and mist irrigation. The thesis also includes testing the functionality of individual electrical circuits, the complete device in the greenhouse, as well as its impact on climatic conditions.
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Changes in the composition of the company's fleet in relation to the EU's "green deal" objectives
Tobiášová, Eliška ; Jandová, Kristýna (referee) ; Bača, Petr (advisor)
The purpose of this master thesis is to examine the so-called Green Deal and the related directives and regulations that are intended to help achieve the objectives set out in the Green Deal, as well as to analyse the fleets of the Member States of the European Union and the company with which cooperation has been established as part of this work. The thesis describes the Green Deal and its objectives. The European Union directives and plans with the aim of reducing CO2 that are currently approved or are yet to come into force are also mentioned, while at the same time they are compared with the directives and targets in force in the EU Member States, including the Czech Republic. In the following chapters, a brief description of the cars by type of fuel is given in order to follow a detailed analysis of the fleets of Germany, Sweden, Spain, Slovakia, France, Poland and the Czech Republic. This analysis is carried out using graphs and official statistics available from government institutions. Furthermore, an analysis of the company's fleet is made, summarising in tables the parameters of the vehicles available to the company. The results of the fleet analysis are also summarised in graphs based on the year of vehicle manufacture, emissions, and fuel type. In addition, an analysis of hybrids and electric vehicles currently in the company's fleet is also provided. This analysis works with data provided by the company and examines the cost of driving these vehicles, consumption, and battery usage ratio. Finally, a suggestion is made for the replacement of the current vehicles with the aim of saving emissions.
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Study of the ecological impact of production, operation and disposal of various types of cars
Kutnar, Václav ; Jandová, Kristýna (referee) ; Jaššo, Kamil (advisor)
To reduce greenhouse gas emissions, countries have focused on (among other things) automobile transport. However, there are different car powertrains, and each produces a different amount of emissions from different parts of their lifecycles, which also vary from state to state. Knowing exact, comparable values is necessary for deciding how to reduce these emissions most efficiently and economically possible. Existing studies often focus on only one part of the life cycle and/or are not localized to a particular state. This study analyses the entire life cycle of a vehicle and its fuel or energy for a vehicle manufactured, operated, and recycled in the Czech Republic. It draws on existing studies, supplemented by data from state agencies, vehicle manufacturers, and our calculations. It was found that in the Czech Republic, compared to a vehicle with a petrol internal combustion engine (ICEVg), an electric vehicle (BEV) has 33% lower total GHG emissions, and a vehicle with hydrogen fuel cells (FCEV) 19% lower. However, an internal combustion engine vehicle has lower emissions from its production and as a result, its cumulative emissions are lower than an electric vehicle until 70,000 km driven and a hydrogen fuel cell vehicle until 111,000 km
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Measurement and creation of irradiance maps of irradiated surfaces
Šindelářová, Anna ; Jandová, Kristýna (referee) ; Křivík, Petr (advisor)
This diploma thesis deals with the measurement and creation of irradiance maps of irradiated surfaces. In the first part of the thesis, there are defined light and light radiation and its types and there are explained the basic concepts closely related to light radiation. Furthermore, this thesis also describes different types of radiation sources and their effect on irradiated surfaces. The theoretical part concludes with a chapter on radiation sensors, specifically pyranometers. In the second part of the thesis, the intensity of the radiation incident on the selected surface was measured by the selected radiation source, and then the radiation distribution was simulated using the Agilent VEE Pro 9.2 software environment. Subsequently, the measurement and its simulation were processed and evaluated.
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Critically endangered Large Heath butterfly in Šumava: situation, trends and threats
JANDOVÁ, Kateřina
The main goal of this work was to map the occurrence of the large heath (Coenonympha tullia) from the Nymphalidae family in the Bohemian Forest National Park. This species currently occurs in the Czech Republic only in the Bohemian Forest peatlands up to an altitude of 900 m above sea level and very rarely in the Třeboň region (Hanč et al., 2019). Monitoring took place in June 2023 in the Bohemian Forest peatlands in the Moldau floodplain. I visited in total 51 sites with a potential distribution of the species. The large heath (Coenonympha tullia) was found in 11 of them. I monitored also several potential predictors of the butterfly occurrence, including an information about the distribution of its host plants, cottonsedge (Eriophorum vaginatum) and common cottongrass (Eriophorum angustifolium). Subsequent statistical comparison of various indicators at the sites from 2023 with monitoring from 2021 (Fric and Walter, 2022) showed that indeed the Bohemian Forest peatlands are drying out. After comparing the number of large heath (Coenonympha tullia) individuals, it was found that the number of individuals in 2023 was higher than in 2021.
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Determination of climatic factor on the degradation of various solar cells types
Peroutka, Tomáš ; Jandová, Kristýna (referee) ; Vaněk, Jiří (advisor)
In this work are discussed photovoltaic cells. There are also discussed basic concepts of radiation source for solar cells. Also mentioned the issue of semiconductors and even the history and evolution of the solar cells. A large part deals with possibilities of photovoltaic cells degradation. In one chapter is an attempt to bring some types of photovoltaic cells and a description of the production of these modules.The practical part deals with photovoltaic modules degradation and its evaluation. Following part compares measured values with the values provided by producer of photovoltaic modules.
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Energy yields per one hectare of land in the South Moravian Region
Plášek, Tomáš ; Bayer, Robert (referee) ; Jandová, Kristýna (advisor)
This bachelor thesis compares methods of producing elektricity in biogas plant, in thermal power plants by burning biomass, in solar power plants and compares it with production of energy of fuel cells and the energy from biofuels, like biodiesel and bioethanol. It compares the energy yields of different energy production methods and evaluates their advantages and disadvantages. It compares the energy content of these fuels by model vehicle range.
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