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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...
The evaporative coolant hasn't the trait of making hollow conductor blocked in the evaporative cooling system of the hydrogenerator. If the processing quality is not ensured, the hollow conductor will be partly blocked thus it is important to calculate the temperature distribution of the stator bar on flow blocked. In our works, the finite difference method was adopted and some conclusions were followed.
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...
The condenser is the key component in the evaporative cooling hydro generator. The design of the condenser will directly affect the performance of the whole evaporative cooling system as well as the temperature distribution of the stator bar. So, this paper introduced the method of the arrangement of condensers and the design of the capacity of each single condenser. Especially, under unsymmetrical...
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...
This paper presents a kind of simulation software for computing the characteristics of flowing and heat transfer in the stator bars' evaporative cooling system of large hydrogenerators. A model experiment using the real stator bar of Three Gorges' hydrogenerator was introduced also. Under experimental conditions, temperature distributions and utmost thermal load are calculated using the simulation...
This paper presents a kind of simulation software for computing the characteristics of flowing and heat transfer in the stator bars' evaporative cooling system of large hydrogenerators. A model experiment using the real stator bar of Three Gorges' hydrogenerator was introduced also. Under experimental conditions, temperature distributions and utmost thermal load are calculated using the simulation...
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