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The Power density of ECRIS magnet coil is larger than 3000kW/m3, and evaporative cooling technology is an ideal method to achieve the cooling requirement. The two phase flow of evaporative cooling system affects the cooling efficiency of coil. This paper introduces the self-driven evaporative cooling system of magnet, and analyses the pie structure of magnet coil and two phase flow channel in the...
As a widely used clean and renewable energy, the wind power has attracted the attention of all nations in the world. The application of evaporative cooling technology in the cooling method of large wind power generator is a new attempt in the discovery of wind power energy. This paper mainly discusses the air cooling condenser with frequency converted axial fan which is adopted in the natural 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 solve the cooling problem of the large electrical machine under special situation, the staff of IEECAS brought forward new coolant and cooling structure for spraying evaporative cooling system based on experiences of evaporative cooling electrical machine for many years. The article discusses detailed the key problems include systems structure, theory calculation and experiment. By the...
In some particular circumstances, the air-cooling condenser must be adopted as the secondary cooler in the evaporative cooling system of large electrical equipments. For the cooling medium in the air-cooling condenser is the air and the distribution of temperature is uneven along the cooling tube, so it's necessary to do deep research on it. Experiments are carried out to study the heat transfer characteristics...
Close-loop self-circulating (CLSC) evaporative cooling technology is a newly developed cooling technique in the evolution of large electrical machines and other large electrical equipments. As the driving power of the coolant in the circulating loop of the self-circulating evaporative cooling system is very small, each part of the resistance must be studied thoroughly to minimize them. This paper...
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...
In order to make sure that the evaporative cooling method has the same cooling effect with the inner water cooling, in this paper, we compared this two cooling modes through analysis method and numerical calculation method respectively. The results show the evaporative cooling has almost the same cooling effect with the inner water cooling method. At the same time, the evaporative cooling system has...
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