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when we design immersing evaporative cooling turbo generator, How to control the temperature rise of stator bars in an appropriate situation is one of the most important parts in the unit designing. In this paper, the heat flowing paths of stator components are analyzed in the immerging stator structure. Based on the heat transfer theories, Numerical simulation model is built for the stator temperature...
Evaporative cooling technique is successfully applied for large turbo generator following the air-cooled, hydrogen-cooled and water-cooled techniques. Compared with the three techniques, evaporative cooling technique absorbs the heat of thermal parts of generator by vaporization latent heat of coolant, which is sharply more efficient than the specific heat cooling approaches. The temperature rise...
The calculation of large hydrogenerator's magnetic and thermal fields is very complicated due to the complexity of their construction, different properties of their materials and nonlinearity of core B-H curve. Finite Element analysis tools are relatively convenient for solving these problems. In this paper, Ansys software is adopted in analysis of the Three Gorges' 840MVA evaporative cooling hydrogenerator...
In order to make Three Gorgespsila evaporative cooling hydrogenerators have the best thermal performance, optimal design for the evaporative cooling system of stator bar has been made, and the thermal characteristic of the stator was analyzed by 3D FEM coupled analysis tool in this paper. The results provide the design basis for the industrial unit and show the evaporative cooling generator has lower...
Firstly, this paper introduces two kinds of traditional cooling methods for hydrogenerators. Secondly, it shows the development and the status quo of evaporative cooling technology. Thirdly, it proves that the evaporative cooling technology will temporize the development of Green Power in 21st century from two aspects of reliability and environmental protection. Finally, the developing foreground...
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