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Design of Cooling and ventilation system in family house
Bíza, Michal ; Charvát, Pavel (referee) ; Pech, Ondřej (advisor)
The diploma thesis is focused on the design of ventilation and cooling for the family house. The first part of the thesis deals with possibilities of ventilation and cooling, air ducts and their components and selected ventilation units. The next part deals with the analysis of air-conditioning routes, their dimensions and pressure losses. Then the heat gain is determined, and cooling is proposed. The last part deals with the comparison of financial costs for purchase of all components for ventilation and cooling, assembly, installation and operating costs. The enclosed drawings and item lists are at the end of the thesis.
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Pressure losses in heating systems
Švanda, Martin ; Horká, Lucie (referee) ; Počinková, Marcela (advisor)
This diploma thesis deals with pressure losses in heating systems. The diploma thesis is divided into three sections. The first part is theoretical and deals with the occurrence of pressure losses. It discusses the properties of the fluid that affect pressure losses. It also deals with hydrodynamic phenomena, flow distribution, pressure loss distribution and its calculations. The aim of the second part, which is practical, was to create a heating project for a selected object. The object is a two-floor kindergarten building located in Velké Němčice. For this project, two heating variants were created. For the first variant, radiators and heating benches were designed and for the second variant, underfloor heating was installed in the building. The goal was to use a source which will gain heat mainly from renewable sources, so the air / water heat pump was chosen as the source of heat production. The project ends with a technical report. The third part of the thesis is dedicated to an experiment which purpose was to find out how the pressure losses of the connecting pieces are reacting to the change with the change of the heating water conditions (flow, temperature). Alongside, two pipes were created which differed in the type of connecting pieces so it allowed to compare how their pressure losses differ. Both pipes were connected by radial pressing, but the fittings differed in the quality of the brass, and therefore in the construction. Also, part of the experimental section of the diploma thesis is a description of the course of radial pressing of fittings from the Herz company.
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Cleaning of ventilation systems and potential energy savings
Lapáček, Milan ; Rubina, Aleš (referee) ; Máša, Vítězslav (advisor)
The main aim of this thesis is to explore fouling of air ducts and its influence on energy consumption of HVAC systems. The first part focuses on typical parts that create the IAQ in buildings and on evaluating energy consumption of air transportation. The following section deals with the theories of fluid flow, flow regimes and pressure losses that are created as a side effect. The thesis outlines possible methods of assessing the impact of pollution with an emphasis on pressure losses and their influence on the fan power consumption. The actual experimental measurement, conducted in a selected industrial plant, is focused on an influence of cleanness of textile diffuser on HVAC device power consumption. For the further research of this process, measuring equipment with suitable measurement method is designed and constructed.
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Heat exchanger design
Vašíček, Jan ; Baláš, Marek (referee) ; Špiláček, Michal (advisor)
This bachelor thesis deals with the design of a cooling water – water heat exchanger. The content of the work is the basic sorting and description of the heat exchanger. Next it includes calculation and design of geometric dimensions, calculation of pressure losses in the tubeside and shellside and calculation of the actual output of the heat exchanger. This work also contains the drawing documentation of the designed heat exchanger.
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Optimization of EGR system and water injection for gasoline engine
Kertész, Tibor ; Svída, David (referee) ; Bazala, Jiří (advisor)
Naturally aspirated petrol engine, pressure losses, EGR, low-pressure EGR, water injection, power increasing, BSFC, GT-Power, thermodynamic model, engine knock
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Steam Grate Biomass Boiler
Suchánková, Lenka ; Křemínský, Pavel (referee) ; Lisý, Martin (advisor)
The master's thesis describes the design of the steam boiler, which burns biomass with heat output of 6 MW. The required parameters of the steam are a temperature of 300 °C and a pressure of 2,5 MPa. The thesis is gradually devoted to stoichiometric calculations through heat losses and boiler efficiency, to the design of the combustion chambre, heat exchangers and pressure losses. Part of the thesis is drawing documentation of the boiler.
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Physical phenomena in air transport
Bělehrádek, Lukáš ; Uher, Pavel (referee) ; Rubinová, Olga (advisor)
The aim of this thesis is to design an air conditioning system of a flat unit in two variants of piping. The piping system of the first floor is installed into the floor in one variant, in the other it is in the ceiling. Data received from measurements within the experiment have been used for the design. The result of the measurement are minor loss coefficient implemented for bending pipes and pressure losses caused by rubbing. These values are used for dimensioning piping variants. Both types of piping are described in the theoretical part and the method of how the experiment had been processed.
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Design of ventilation and cooling system in family house
Bareš, Josef ; Charvát, Pavel (referee) ; Pech, Ondřej (advisor)
The diploma thesis is focused on a ventilation and cooling design of a family house. Author’s idea was to make summary of theoretical information and project documentation for realization (installation) of the ventilation and cooling. Introduction of the house disposition, theoretical research of a current cooling and ventilation options in residential buildings are parts of this thesis. Next it contains thermal load calculation, two designs of a cooling and three designs of a forced ventilation, dimensioning of the pipelines and financial cost comparison of a purchase, assembly, working and service of a designed systems.
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Thermal-hydraulic calculation of heat exchanger
Zemach, Vít ; Toman, Filip (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals with thermal-hydraulic calculation of heat exchanger. The first part describes the basic types of heat exchangers considering their construction and utilization. In the second part of the thesis, a complete thermal calculation of the designed heat exchanger is presented. This exchanger is shell and tube heat exchanger with straight tubes. The last part of the thesis is hydraulic calculation of pressure losses. All calculations are made in the EES program.
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