|
|
Refrigeration system with passive evaporator
Carbol, Marek ; Mauder, Tomáš (referee) ; Hejčík, Jiří (advisor)
This thesis is concerned with the design of a heat pump that does not use a ventilator during operation. In the introductory chapter, the functioning and the basic components of this device and other types of heat pumps are described. Properties of some commonly used refrigerants and oils as well as their classifications are stated. Due to the absence of a ventilator, a special heat exchanger was designed to achieve the required heat power. The choice of components in this refrigeration system takes into consideration the efficiency and functionality of the device.
|
|
|
Heat pump water heater
Mazálek, Karel ; Charvát, Pavel (referee) ; Hejčík, Jiří (advisor)
This Master's thesis deals with reusing waste heat from the kitchen and .cold rooms of a restaurant, as a source of heat for heat pump water heater. The first part is about basic principles and theory which is needed to understand the function of heat pump and possibilities of reusing wasted heat. In the other parts, there are calculations and designs not only of a heat pump, but also coolers and ventilation unit needed for recycling of heat.
|
|
|
Production and storage of hydrogen
Krátký, Štěpán ; Lízal, František (referee) ; Hejčík, Jiří (advisor)
The goal of this bachelor’s thesis is to make an overview of current technologies used to produce and store hydrogen. First part deals with production technologies. Hydrogen production is divided into three categories: production of hydrogen from fossil fuels, from water and from BIO sources. Second part is dedicated to storage technologies and contains the most known methods of hydrogen storage.
|
|
|
Space heating of a one-story home
Kazda, Jan ; Hejčík, Jiří (referee) ; Charvát, Pavel (advisor)
This bachelor thesis deals with the calculation of the heat loss in a single- storey family house. The calculation is done in detail for every room. After calculation there is a suggestion of a heating system and source of heat. Next part of the thesis presents a real technology of the heating in a family house. Prices of the real and ideal systems are also compared.
|
|
|
Heat pump system for waste heat utilization
Toman, Filip ; Hejčík, Jiří (referee) ; Bobák, Petr (advisor)
The aim of this thesis is determination of the configurations and parameters of the system for heat recovery from waste water from washing machines with a heat pump. The first part of the thesis deals with the principle and construction of heat pumps and the use of heat from waste water. The second part of the thesis deals with the construction of the system for preheating of clear water which flows to washing machines. The main section of the second part of the thesis is the design of the heat pump with evaluation of the proposed solution.
|
|
| |
|
|
Economy of ventilation units
Kratochvila, Lukáš ; Pech, Ondřej (referee) ; Hejčík, Jiří (advisor)
This bachelor’s thesis discuss methods of comparing air handling units from the economy of operating stage aspect. Introductory chapters have research character and they are about ventilation and air handling units. In further chapters, there are described and demonstrated 3 methods for comparing units. These methods are compared in the conclusion.
|
|
|
Ice maker with direct evaporation
Loibl, Jan ; Hejčík, Jiří (referee) ; Pospíšil, Jiří (advisor)
The theoretical part of the diploma thesis deals with introduction to the issue of refrigeration systems with thermal energy storage. Possibilities of thermal energy storage with phase change are introduced. The thermodynamic principle of functioning of the particular refrigeration system type is explained here as well as its coefficient of performance and fundamental components. In addition, several examples of ice-making systems are discussed. In the practical part the design of a particular refrigeration system is calculated. The main part of the design is the cold evaporator with direct evaporation and the possibility of ice production and its usage for thermal energy storage. The calculation of the overall two-phase heat transfer is carried out.
|
|
|
Water chiller for ceiling cooling system
Havlíček, Jan ; Chovancová, Michaela (referee) ; Hejčík, Jiří (advisor)
The topic of this diploma thesis is to design water chiller for ceiling cooling system. The thesis is divided into four main parts. The first part deals with the theoretical description of emitting cooling systems. The following part focuses on the theory of refrigerating systems and describes especially the thermal cycle and refrigerants which are used in cooling systems. In the third chapter refrigerating equipment are described. Compressor, heat exchangers and expansion valves belong to the main parts of refrigerating systems. The final chapter is devoted to the draft and selection of components of the refrigerating system.
|
|
|
Family house energy requirements audit
Němec, Miloš ; Hejčík, Jiří (referee) ; Fišer, Jan (advisor)
The bachelor’s thesis deals with a comparison of several modifications of the terraced house, which should reduce the final energy requirements. For this purpose National calculating tool is applied, which complies with Czech government regulation no. 148/2007 Coll. In conclusion, individual modifications are evaluated accordely to energy savings and simple return on investments.
|
guest ::
