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Water to water heat pump design
Jašek, František ; Formánek, Marian (referee) ; Hejčík, Jiří (advisor)
First part of my diploma thesis contains theoretical description of compressor based heat pumps, refrigeration cycle, main components of refrigeration cycle and auxiliary equipment. Second part contains the heat pump WATER-WATER desing. It will be used for heat recovery from cogeneration units in heating plants.
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Fotovoltaic systems for residential houses
Chadim, Jakub ; Jaroš, Michal (referee) ; Hejčík, Jiří (advisor)
Bachelor´s thesis describes dilemma usage of solar energy by photovoltaic. It explains fundamental terms pair with conversion solar radiation on electric current. Further it presents review today exploited photovoltaic‘s systems and focuses on using this technology in residential houses along with modelling proposal photovoltaic’s system in technical, legislative and economics site project.
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Heat storage in solar thermal systems
Sedmidubský, Petr ; Hejčík, Jiří (referee) ; Charvát, Pavel (advisor)
This bachelor´s thesis deals with heat storage in solar thermal systems. The first part of the thesis is devoted to the solar energy. The problems with its use are described in this part. The second part is devoted to solar thermal systems. Various types and designs of solar thermal systems are described in this part. The third part of thesis is devoted to the various types of solar thermal systems. The principle of their operation, advantages, disadvantages and the possibility of their practical use for each type is describe in this part.
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Heat exchangers for heating
Blažek, Miroslav ; Hejčík, Jiří (referee) ; Jaroš, Michal (advisor)
The Heat exchangers are important part in the energy transfer between two substances. Bachelor’s thesis deals with the problems of the option of the heat exchangers. It seperated into two parts. In the first theoretic part there are shown the basic criteria of this option. The next part deals with the most frequent types of usage of heating units or convectors.
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Heat pump performance data analysis
Šeda, Libor ; Krejčí, Vladimír (referee) ; Hejčík, Jiří (advisor)
V bakalářské práci jsou shrnuty dostupné metody a koeficienty užívané k testování výkonu a ekologické náročnosti tepelných čerpadel. Pro testování dle norem ISO jsou zde také vysvětleny vstupující faktory. V praktické části je vyhodnocen běh reálného tepelného čerpadla z hlediska výkonnostních parametrů a parametrů týkajících se běhu kompresoru, jako je počet pracovních hodin nebo počet odmrazení.
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Design solution for the control of existing buildings technologies
Neminář, Štěpán ; Drábek, Ivo (referee) ; Hejčík, Jiří (advisor)
This master´s thesis is dealing with designing wireless management system for existing buildings. In the first part there is description of topologies a communication protocols used for wireless automation. Further there are characterized some devices for lighting, heating, ventilation and cooling regulation. These are used for a model network of a building management, where is system OpenHAB also presented. In the next chapter is aprissed specific edifice and its typical operation where is also designed basic and extended solution for it. This part continues with computation of energy consumption in TRNSYS software, that are used to calculate economic return for both variants.
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Absorption chiller
Najbrtová, Zuzana ; Bouchal, Patrik (referee) ; Hejčík, Jiří (advisor)
The master thesis on the Absorption chiller is devoted to the dimensioning of the operating points of the absorption chiller cycle. The thesis is based on the required realistic parameter such as cooling capacity, temperature of the chilled fluid and temperature of the driving hot water. The proposed duty cycle is single stage with two heat recovery exchangers, one between weak and rich solution, and the other between liquid and gas refrigerant. The working fluids of this cycle is ammonia and water. The thesis is divided into theoretical and practical parts. The theoretical part summarizes the basic knowledge of absorption cooling, including an explanation of the principle of trigenera-tion in which the proposed unit is to operate. The practical part deals with the actual design and calculation of the operating points, parameters of the secondary working fluids and the performance of the devices themselves. The calculation is compared with the real absorption units and the compressor unit.
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Air filtration methods
Valenta, Jiří ; Pech, Ondřej (referee) ; Hejčík, Jiří (advisor)
achelor thesis provides an overview of the methods used in industrial air filtration. The work consists of the 5 main parts of dry and wet mechanical separators, electric precipitators, fabric filters and filter media.
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