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Energy performance of air handling units for swimming pool halls
Batelka, Václav ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
The thesis is focused on determining the energy flows and the creation of an internal microclimate swimming pool halls. It describes the problems of design, the potential risks associated with the use of pools and thermodynamic processes heat and mass transfer. For this purpose was developed simulation program, which examines the behavior of heat and humidity in the room depending on external factors. The room can be simulated for any time period and geographic location. The outputs of the simulation are heat and mass balance, which will be covered air condition units. Three variants were designed and optimized solutions comparing claims on their operations. The experimental part is focused on the evaporation of the water. Measurement examines dependence of the speed of evaporation of water at different boundary conditions. Was investigated temperature dependence of water, temperature and relative humidity and air velocity above the water surface.
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Opportunities for 3D printing in the process industry
Haltmar, Jakub ; Jegla, Zdeněk (referee) ; Babička Fialová, Dominika (advisor)
This bachelor thesis deals with the possibilities of using additive technologies in the process industry, especially in the field of heat exchangers (heat sinks), membrane distillation and structured packing. In the first part, the thesis provides an overview of the materials and additive technologies used in these process units. The next part is devoted to specific examples of the use of 3D printing in the process applications and their comparison with conventional manufacturing technologies in the world. Furthermore, an overview of supported projects according to the Research, Development and Innovation Information System projects and the market situation in the Czech Republic is outlined. Recommendations for the development of additive manufacturing in the process industry are proposed in the discussion. In the addressed area, process improvements (efficiency, performance or completely new applications) are most often achieved due to the ability of additive manufacturing to produce complex geometries increasing the functional area while maintaining built-up dimensions and materials specific to the process industry.
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Energy performance of air handling units for swimming pool halls
Batelka, Václav ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
The thesis is focused on determining the energy flows and the creation of an internal microclimate swimming pool halls. It describes the problems of design, the potential risks associated with the use of pools and thermodynamic processes heat and mass transfer. For this purpose was developed simulation program, which examines the behavior of heat and humidity in the room depending on external factors. The room can be simulated for any time period and geographic location. The outputs of the simulation are heat and mass balance, which will be covered air condition units. Three variants were designed and optimized solutions comparing claims on their operations. The experimental part is focused on the evaporation of the water. Measurement examines dependence of the speed of evaporation of water at different boundary conditions. Was investigated temperature dependence of water, temperature and relative humidity and air velocity above the water surface.
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ELECTROCHEMICAL DETECTOR WITH ELECTRODES ARRAY AND ROTATING DISK
SAJDLOVÁ, Zuzana
The thesis deals with the testing and optimization of hydrodynamic conditions of the electrochemical detector, which consists of a flow cell containing the electrochemical sensor with an array of electrodes. The flow cell includes a rotating disc-shaped component, which allows radial flow of analytes along the sensor electrodes. This principle imitates the rotating disk electrode, with the difference that here the electrodes are immobile. Hydrodynamic phenomena in this case are similar to RDE. Therefore, the theoretical part of my work deals with hydrodynamics and mass transfer for the well-described case of rotating disk electrode. It was found that in the current set-up under certain conditions, an analyte flowed back from the output cell channel to the sensor, even at the laminar flow. This causes a nonlinear response of the electrodes and their low reproducibility. The solution is to reduce the distance between the rotation component and the electrodes surface and reduce flow speed of analyzed liquid towards the sensor. A novel type of sensor with annular electrodes was designed and tested. It showed four times higher conversion rate of the analyte compared with the originally used AC9 electrochemical sensor having electrodes in the form of full circles lying on a circumference of a common circle. Based on calculations, conversion of the analyte on the plane electrode can be increased up to 100% when using this annular sensor, adjusting flow cell and reducing of the input flow rate. The detector was connected to the liquid chromatograph and its function was tested on two substances - ascorbic acid and dopamine. For the current detector these parameters were set: dynamic range, linearity, noise, detection limit, time constant and the temperature range at which the detector can be operated.
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