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Energy evaluation of apartment building's attic space
Sluka, Marek ; Dvořáková, Hana (referee) ; Rubina, Aleš (advisor)
The bachelor thesis deals with energy evaluation of apartment building’s attic space at Křenová Street in Brno. The results will be compared with energy consumption values, measured during the last years. The main task is to suggest a more energy efficient solution to the evaluated space. Refrigerants for compression cooling system will be described in the theoretical part of the thesis and, as a result, a refrigerant for the optimized solution will be specified.
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Heat pumps
Kubik, Martin ; Fortelný, Zdeněk (referee) ; Chroboczek, Libor (advisor)
The Bachelor thesis contains a brief introduction to heat pumps problems and analyses a principle of their operation. In this thesis there is further mentioned partition and characteristics of compressors, heat exchangers and refrigerants. In the thesis there are described heat pump types, which are: air–water, water–water and ground–water, including advantages and disadvantages and conditions of realization. The last part of the thesis deals with calculation of investment in the case of using heat pump for hot service water heating and its analysis.
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Energy evaluation of systems VRF
Gašpár, Juraj ; Hanyk, Kamil (referee) ; Rubina, Aleš (advisor)
This master thesis deals with VRF systems, which are used for extensive commercial and office buildings, or for buildings where there are multiple zones with different required parameters. The aim of the thesis is to explain the functions of the system and their evaluation and inclusion into energy classes according to the new legislation. The practical part deals with an application of the VRF system and its variants in the building of bank branch. The comparison of initials costs and resultant costs to operate the system. The experiment focuses on comparison of the measured values of VRF system and their comparison with data from the manufacturer.
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Heat transfer analysis of phase-change process in tubular exchanger
Fečer, Tomáš ; Bašta,, Jiří (referee) ; Kabele,, Karel (referee) ; Plášek, Josef (advisor)
The system HVAC is frequently based on cyclic phase change of boiling fluid. This phase change of boiling fluid (liquid-gas or gas-liquid) is coupled with boiling heat transfer by nucleate boiling, convective boiling and pre/post dryout effect. The nucleate boiling is depended on superheat of wall (i.e. heat flux) and presence of active nucleation sites. The two-phase convection boiling with dependence on mass flux and vapour quality is performed in liquid film between superheated wall and vapour core. The pre/post dryout effect is significant, when the liquid film is consumed and superheated wall is exposed directly to vapour core. This boiling heat transfer by nucleate boiling, convective boiling and pre/post dryout effect is simplified for engineering design on boiling heat transfer coefficient. Therefore, the dissertation thesis is aimed at experimental analysis of phase-change process in advanced engineering design.
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Draft cooling system for food
Doležal, Jan ; Vlček, Petr (referee) ; Formánek, Marian (advisor)
The bachelor thesis deals with the cooling systems of food premises. The theoretical part focuses on the issue and various possibilities of direct cooling. The result of the calculation is design of optimal cooling system for object to poultry processing.
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Gas heat pumps based on stroke engine
Bedřich, Miroslav ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The aim of this Diploma thesis is a description of gas heat pump (GHP) technology and the possibility of their usage in real life. Also units from the major manufactures of GHP units in the Czech Republic and abroad are evaluated from technical and economical point of view. The thesis as well includes a part where is decided if it is better to further develop GHP units with higher or lower performance. In the last part of thesis are cooling circuits designed for both lower and higher performance, than performance of existing GHP unit Polo 100. As a result, the units with higher performance are more perspective. Therefore heat plate exchangers, which serve as a condenser and an evaporator, are designed for unit with higher performance.
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The used principles of industrial cooling
Machala, Jiří ; Sekanina, Bohumil (referee) ; Kavička, František (advisor)
This thesis summarizes the main cooling methods used in industrial cooling systems. It also discusses the fluids used in cooling, their influence on environment; ozone layer and climate change. The thesis closely describes the properties of ammonia and out of the many cooling methods on the market, it mostly concentrates on ammonia cooling systems. The thesis also discusses heat pumps, vortex tubes, and thermoelectric cooling.
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Automotive air Conditioning
Bezděk, Matěj ; Pernický, Marek (referee) ; Hejčík, Jiří (advisor)
The topic of the bachelor’s thesis Car air conditioning is a review of current car air conditioning systems. The development of the systems from inception to the present days is briefly described. Further more function and structure of the systems are described. The bachelor’s thesis pays attention to the structure and function of particular components. The progress of the coolant is also commented because that is an inseparable part of car air conditioning systems. The bachelor’s thesis also comments the impact of using car air conditioner on the total fuel consumption.
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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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eating of the veterinary clinic
Němečková, Šárka ; Blasinski, Petr (referee) ; Počinková, Marcela (advisor)
The aim of this bachelor thesis is a processing of a project regarding heating system and warm water production for the veterinary clinic. The building has two overground floors and flat roof. A source of the heat for the building is an air-water heat pump. Heating surfaces are panel radiators. There is natural ventilation in the building mostly.
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