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Modeling of the distribution of the temperature field with a change in the coefficient of thermal conductivity of the new electrical insulation system of the turbogenerators
| Citace: |
TOMÁŠKOVÁ, T. Modeling of the distribution of the temperature field with a change in the coefficient of thermal conductivity of the new electrical insulation system of the turbogenerators. Singapore, 2024.International Conference on Materials Science, Engineering and Technology.
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| Druh: | PŘEDNÁŠKA, POSTER |
| Jazyk publikace: | eng |
| Anglický název: | Modeling of the distribution of the temperature field with a change in the coefficient of thermal conductivity of the new electrical insulation system of the turbogenerators |
| Rok vydání: | 2024 |
| Místo konání: | Singapore |
| Autoři: | Ing. Tetjana Tomášková Ph.D. |
| Abstrakt EN: | Electric power plays a significant role in the rise of the economic potential and development of every country in the world. The growing global demand for electricity generation and the industrial use of turbogenerators in electricity generation have led to their irreplaceable role at present. Another global increase in electricity consumption could occur due to the commitment to decarbonize economies. Therefore, any attempt to improve the quality of turbogenerators was of considerable value. Currently, in the field of turbogenerator production, there is interest in machines with smaller outputs, max. 300 MVA, but, unlike the previous types, with relatively simple air cooling. In order to be able to produce these turbogenerators, very efficient cooling systems with the lowest possible heat losses and the highest possible efficiency are required. Especially with regard to ensuring operational reliability and preventing component damage, it is then necessary to know a detailed description of the temperature increase system and perfect prediction of critical points. Machine size, transport methods and price also play a role. The low purchase price and low operating costs are the reason for this trend. In addition, it can also promote the sustainable development of the economy and society. In the beginning of the article, the possibilities of influencing the heat balance of turbogenerators with the help of fillers with a higher coefficient of thermal conductivity are described. The main part of the article deals with the modelling of the distribution of the thermal field (°C) of the stator of turbogenerators for values of thermal conductivity coefficients from 0.2 (W?m?1 ?K?1 ) to 0.6 (W?m?1 ?K?1 ) see Fig. 1. By modelling the distribution of the temperature field with a change in the coefficient of thermal conductivity, the assumption that microfillers can affect the thermal properties of the material was verified. By adding fillers with a higher thermal conductivity than the base material, losses are dissipated better. At the end of the article, the economic benefit of the new electrical insulation system with a higher value of the thermal conductivity coefficient is summarized and the steps of a future experiment are described, where the possibility of influencing the removal of waste heat of turbogenerators by increasing the thermal conductivity of the electrical insulation system by means of aluminum oxide, which has a higher value of the thermal conductivity coefficient. |
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