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Energy efficient building systems
Červený, Miloš ; Horká, Lucie (referee) ; Počinková, Marcela (advisor)
The first part of the thesis deals with the issue of indoor climate in school buildings. The second part deals with the design of the heating system in the extension of the primary school, including the design of the source and the reconstruction of the source for the existing building in a variant solution. The last part of the thesis is devoted to experimental measurement of indoor air quality in elementary school.
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Effect of an exhaust opening location on air quality in an apartment
Charvát, Tomáš ; Forman, Matěj (referee) ; Krejčí, Vladimír (advisor)
This thesis deals with the influence of the location of exhaust outlets on the air quality. The study examines the performance of the hybrid ventilation system installed in an experimental house. The central point of this work is a numerical model of a bedroom with heat and carbon dioxide sources. The temperature, speed and concentration fields have been solved for, from which further quantities of thermal comfort PMV, PPD and DR were evaluated. Finally, the impact of changes in the quality of the microclimate using these quantities and in the energy efficiency ventilation is assessed.
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Ventilation of near zero energy buildings
Fojtík, Pavel ; Horká, Lucie (referee) ; Hirš, Jiří (advisor)
Diploma thesis is focus on ventilation systems in Zero energy building and indoor air quality. Whole thesis has three part. First is about theory, where you can find law regulations and standards connected wit nZEB, factors influence IAQ and introduced ventilations systems. Second part is focus on particles transport in buildings like a nZEB and in heat recovery units. Last part of the thesis shows own design of the nZEB for Nový Lískovec.
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Effective management of building technologies with a focus on measuring humidity and CO2 concentration
Bučko, Ondrej ; Bátora, Branislav (referee) ; Janík, Daniel (advisor)
The diploma thesis deals with automated measurement of humidity and CO2 concentration inside buildings. Results of this measurement form the input parameters for the effective management of technologies reducing the energy performance of buildings. In the introduction, the issue of indoor air quality of buildings and indicators characterizing this quality are approached. The technical part of the thesis consists of making a measuring device which contains two prototype sensors provided by Teco Inc. with online access to measured data. The measurement of relative humidity, CO2 concentration and temperature in the interior of the building with the made device is compared with commercially available devices for measuring selected parameters. For unambiguous interpretation of online data, the virtual machine with an online database is configured for the created measuring device. The possibilities of using the prepared measuring device to achieve a reduction in the energy performance of buildings are discussed in the final part.
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Demand controlled ventilation in buildings
Černík, Václav ; Kolbábek, Antonín (referee) ; Charvát, Pavel (advisor)
This bachelor’s thesis deals with different methods of building’s ventilation control, especially with the focus on ventilation controlled by pollutant concentration. In the first part of the thesis, some concepts regarding ventilation and some pollutant’s description are given. In the second part, the most used pollutant detectors are mentioned. Next, various ventilation control strategies are explained, along with their advantages and disadvantages. In the last part, a real-life example of ventilation control is given.
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Indoor Monitoring System For Well-being
Kočka, Jakub ; Arm, Jakub
The work address the indoor air quality monitoringenabling to monitor the well-being and comfort of occupants.A monitoring system is able to measure room temperature,humidity, barometric pressure, CO2, luminosity, and dust pollutionusing chip sensors. The measurement devices are connectedwirelessly via ZigBee 3.0 technology enabling mesh networktopology and the measured data is collected into a database.The data will be then processed and presented using a cloudapplication enabling advanced control and alarm management,when a value exceeds the health limits. The measurement systemcomprises of measurement devices and a gateway. The measurementdevice is designed as a sandwich architecture comprisingsensor and communication module. The created sensor moduleis interfaced with Adafruit Feather interface in order to useany available Adafruit SoC kit as the communication module.The conducted results also suggest that ESP32-H2, which isnow in pre-production phase, operates as ZigBee 3.0 SoC inan embedded device.
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Research of Systems for Providing the Quality of the Environment in the Car Cabin
Šíp, Jan ; Kavička, František (referee) ; Volavý, Jaroslav (referee) ; Lízal, František (advisor)
Optimal conditions of indoor environmental quality, especially thermal comfort and indoor air quality, are important because they lead to the active safety of passengers. Long-term exposure to inconvenient temperatures may cause thermal stress and negatively affects the driver’s cognitive functions. These include important abilities of drivers, such as concentration, vigilance, speed of decision-making and others. The inappropriate temperature in the cabin is one of the most dangerous factors causing car crashes. Air indoor quality is negatively affected by exhaust gases or particles from tire wear, which enter the car cabin during ventilation. This can be prevented by using an air recirculation system which does not supply outside air, but it is a closed circuit. This mode, however, causes high CO2 concentration in the cabin which can lead to excessive fatigue. This thesis deals with the influence of different ventilation systems on indoor environmental quality, i. e. thermal comfort and indoor air quality. A partial factor of thermal comfort is the flow field which was investigated downstream of a benchmark automotive vent. CFD was applied to determine the flow field downstream of a vent. The results were validated by experimental data acquired by Constant Temperature Anemometry. CFD has been also used for the evaluation of the thermal comfort of three novel ventilation systems (mixing, ceiling and floor ventilation). The results were validated by experimental data acquired by thermal manikin and climate chamber. Indoor air quality has been evaluated based on the Age of Air. The analytical empirical equation by Rajaratnam can be successfully used also to determine the throw of the jet, which is favorable, especially in light of the fact that both computational methods were not very accurate in velocity decay predictions. The Large Eddy Simulation and Reynolds-averaged Navier–Stokes method are suitable for evaluating the flow field downstream of the automotive vent. The diagrams of comfort zones were evaluated for all regimes based on equivalent temperatures. The best performance in terms of the highest level of human comfort was achieved by the ceiling ventilation in the summer conditions and by the floor ventilation in the winter conditions. From the point of view of the Age of Air, the ceiling air ventilation system is the most suitable for the winter conditions. In the summer conditions the Age of Air values for individual air ventilation concepts are very similar for both interior types.
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Effective management of building technologies with a focus on measuring humidity and CO2 concentration
Bučko, Ondrej ; Bátora, Branislav (referee) ; Janík, Daniel (advisor)
The diploma thesis deals with automated measurement of humidity and CO2 concentration inside buildings. Results of this measurement form the input parameters for the effective management of technologies reducing the energy performance of buildings. In the introduction, the issue of indoor air quality of buildings and indicators characterizing this quality are approached. The technical part of the thesis consists of making a measuring device which contains two prototype sensors provided by Teco Inc. with online access to measured data. The measurement of relative humidity, CO2 concentration and temperature in the interior of the building with the made device is compared with commercially available devices for measuring selected parameters. For unambiguous interpretation of online data, the virtual machine with an online database is configured for the created measuring device. The possibilities of using the prepared measuring device to achieve a reduction in the energy performance of buildings are discussed in the final part.
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