通过变压器新旧风冷却器性能的对比，对老式风冷却系统改造的设计方案、改造效果进行了探讨。
By contrast of the new forced-air cooler in transformers to the old one, the design and effect of improvement of the old forced-air cooling system are discussed.
干冷式冷却系统是一种通过采用自然通风原理达到冷却效果的冷却系统。
A dry cooling system is one which effectuates cooling according to the principles of natural air circulation.
最后提出多孔陶瓷间接蒸发冷却器与直接蒸发冷却器复合的二级蒸发冷却系统，其冷却效果更逼近露点。
Finally, the effect of the two-stage evaporative cooling system was present, which are both made of porous ceramic material will be more possible to access to the dew point.
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