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Air recirculation balance of the vehicle's cooling package
Macejka, Kamil ; Čavoj, Ondřej (referee) ; Vančura, Jan (advisor)
The focus of this thesis is to create an effective tool for quick analyses of hot air recirculation at the cooling package, wich is a significant factor that influences its effectivity, to evaluate this influence and to propose viable solutions for its mitigation. The theoretical part of the thesis is devoted to the description of the problem, review of existing scientific studies and introducing the mechanisms responsible for the studied phenomenon. The practical part contains an analysis of flow and thermal effects, whose outputs are used for developing an computational model with a graphical user interface. This model is further used for comparison of effects of various input parameters and based on its results the measures targeted on reduction of recirculation are designed, which are then evaluated using CFD methods.
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Ventilation of a multifunctional building
Košťál, Erik ; Blasinski, Petr (referee) ; Uher, Pavel (advisor)
The bachelors thesis addresses the design of an HVAC system for a multifunctional building, aiming to ensure an ideal indoor microclimate. The multi-story building comprises a complex of residential units complemented by commercial spaces, characterized by a green design. The theoretical part covers the topic of building cooling, from its history to ecological considerations. The computational section includes the actual design of the HVAC units. The third part contains project documentation, a technical report and equipment specifications.
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The energy demand of an indoor ski slope
Mozola, Ondrej ; Linda, Jakub (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the issue of energy requirements for operation of indoor ski slopes. The first part is dedicated to research of snow making, cooling and construction methods of ski halls along with the examples of specific projects. In the second part, the aim was to design a ski hall with specific geometry and insulation and then define energy losses of such building. Subsequently, all related energy flows were calculated, which led to the determination of the required cooling capacity. Based on this, the cooling cycle was calculated and the overall electricity demand for the operation of the ski hall during the year was set. In the third part, three options for covering electricity needs are evaluated and at the same time they are compared in terms of financial costs during the year.
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Structural analysis of part of electrical machine
Fodor, Viktor ; Hájek, Vítězslav (referee) ; Janda, Marcel (advisor)
This thesis discusses the optical diagnostics of electrical motor parts using a 3D scanner. It describes the construction of electrical induction motors, their heat losses, cooling and refrigeration systems that may be used by such motors. It approaches the possibilities of heat recording and briefly explains the 3D scanner’s principal. It also introduces the simulation program ANSYS which uses the finite element method. This thesis shows the post processing of the digitalized object and the simulations and compares the simulation and measurement results. The final part is devoted to the analysis of the obtained results.
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Modern technologies for air conditioning and cooling
Ganczner, Dominik ; Tuhovčák, Ján (referee) ; Lízal, František (advisor)
This thesis provides an overview of modern air conditioning and cooling technologies. Topics of this thesis include different thermodynamic cooling cycles, refrigerants, main components used in air conditioning and cooling units, and a selection of today’s advanced technologies in the field. Furthermore, a selection of discussed technologies are compared to give an idea of their theoretical effects on efficiency.
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The energy demand of an indoor ski slope
Mozola, Ondrej ; Linda, Jakub (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the issue of energy requirements for operation of indoor ski slopes. The first part is dedicated to research of snow making, cooling and construction methods of ski halls along with the examples of specific projects. In the second part, the aim was to design a ski hall with specific geometry and insulation and then define energy losses of such building. Subsequently, all related energy flows were calculated, which led to the determination of the required cooling capacity. Based on this, the cooling cycle was calculated and the overall electricity demand for the operation of the ski hall during the year was set. In the third part, three options for covering electricity needs are evaluated and at the same time they are compared in terms of financial costs during the year.
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Structural analysis of part of electrical machine
Fodor, Viktor ; Hájek, Vítězslav (referee) ; Janda, Marcel (advisor)
This thesis discusses the optical diagnostics of electrical motor parts using a 3D scanner. It describes the construction of electrical induction motors, their heat losses, cooling and refrigeration systems that may be used by such motors. It approaches the possibilities of heat recording and briefly explains the 3D scanner’s principal. It also introduces the simulation program ANSYS which uses the finite element method. This thesis shows the post processing of the digitalized object and the simulations and compares the simulation and measurement results. The final part is devoted to the analysis of the obtained results.
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