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Converter valve cooling device as the heat exchanger, is known as the converter valve's blood circulation system, Inefficiency of the equipment will not only lead to the component overheating damage, but also serious DC system outage. Therefore, reliable HVDC valve cooling system is essential for the HVDC transmission system. In this article, analysis on the two-phase flow heat transfer characteristics...
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...
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...
As a new generator cooling technology, the evaporative cooling technology has been researched on various aspects to a certain extent, such as the two-phase flow pressure drop, temperature distribution and etc. But there has no research reported on the two-phase flow instability in the parallel hollow conductors in the evaporative cooling system. The occurrence of two-phase flow instability phenomena...
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...
A heat transfer calculation approach of spraying evaporative cooling is presented according to its characters using in large electrical machine. Based on the parameters of coolant, fluid and surface structure the calculation approach is confirmed, and gain the relationship between convective heat transfer coefficient and heat flux. Experiment model of spraying evaporative cooling electrical machine...
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