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Thermal analysis of servomotor
Přibyl, Daniel ; Duroň, Jiří (referee) ; Klíma, Petr (advisor)
This thesis deals with the design of the thermal model of servomotor in program Motor-CAD and using it for analyze of servomotor. In the beginning is a short familiarization about its parts, especially important for the thermal model. Further are described principles of heat exchange. There is a chapter, which is dedicated to the program support of the Motor-CAD. Thermal model and electromagnetic model inputs are tuned according to the measured data. Then a way of active cooling is designed and based of it the model in program is edited. Using the model is found the points of load of the motor for maximum allowable temperature with water cooling. In the conclusion is a valorization of benefit of water cooling for the servomotor.
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Water cooling intensity prediction for given thickness of oxide layer
Haluza, Vít ; Hrabovský, Jozef (referee) ; Pohanka, Michal (advisor)
This diploma thesis is dealing with the impact of oxide scales on heat conduction. One of the main tools that were used are numerical simulations. Heat conduction is modelled by solving partial differential equations. Regression models and artificial neural networks are used for the prediction of the influence of oxides on cooling intensity. Determination of the conditions when the cooling was intensified and comparison of individual methods of prediction are the main results of the thesis.
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Design of MR clutch water cooling
Musil, Marek ; Strecker, Zbyněk (referee) ; Roupec, Jakub (advisor)
This paper describes the design and manufacture of water refrigeration for magneto clutch. MR clutch cooling problem was solved by designing of several variants of which was finally chosen the best. Model of water cooling was developed and subsequently made. The cooling is consolidated on a stator of MR clutch. Cooling completely surrounds the body of an MR clutch and thus achieves a high heat transfer between the cooling system and cooled. The proposal was developed with a view to good foldability, so its use is not complicated.
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Condenser
Juráš, Filip ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
The Master´s thesis is dealing with water-cooled condensers and is splitted into three main parts. The first section provides general knowledge about condensers and heat exchangers, including the basic information of hydrophobic surfaces. These surfaces were used during verifying the impact of hydrophobicity on the heat exchange in water steam. The second section describes an experimental testing. It shows the difference between hydrophobic and nonhydrophobic surfaces and their impact on the heat exchange. The third and the last part of this thesis is design and calculation of water-cooled condenser. The design of the condenser is supported by drawings placed in attachement.
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Business Plan
Kloc, Arne ; Navrátil, Jaroslav (referee) ; Rompotl, Jaroslav (advisor)
The diploma thesis is focused on creation of a business plan for establishing a new company. Company makes a new computer sets with water cooling system and own design. The analysis of internal and external environment of the company and particular bisuness plan, are based on theoretical part resources.
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Thermal model of solid rotor high-speed induction motor with water cooling
Súkeník, Jakub ; Vítek, Ondřej (referee) ; Toman, Marek (advisor)
This paper deals with thermal calculations of high-speed induction machine with a solid rotor with a copper coating and water cooling. The first part presents the basic equations and mechanisms of heat transfer, and also describes the method of heat network. In~the~next section, thermal resistances for individual parts of the machine and water cooling are derived. The third part describes the distribution of nodes in the heat network of~the induction machine. The last part contains the results of the heat network for~the~high-speed induction machine with the solid rotor with the copper coating and water cooling. Functionality of the created heat network was verified using Ansys software.
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Mpembův jev
Doležel, Daniel ; Prinz, František (referee) ; Mauder, Tomáš (advisor)
This thesis focuses on so far not cleared up anomaly of water called the Mpemba effect. This term is used for observation of hot water freezing faster than cold water under the same cir-cumstances. By researching dominantly English written scientific publications from last few decades, a complete overview of the whole problem was compiled, which should introduce the nonsense seeming effect, its possible explanations and possible utilization to the reader. Even though several good theories on explaining the Mpemba effect exist, the members of scientific community still have not found an agreement on any of them. Therefore, the search for explanation continues. So far there is no room for enthusiastic or disappointed conclusions as there is no bulletproof theory in sight which would also bring light on possible exploitation of the effect. On the contrary, it seems like the scientists do not seem to converge on a single conclusion, but new theories are popping up introducing new domains of the research.
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