With the increasing awareness of energy and water saving, waste heat recovery has become an important way of energy and water saving, and is becoming popular in oil fields and other places.
随着节能节水意识的普遍深入，余热回收成为节能节水的一条重要途径，热电联供是回收余热的一种重要方法，在油田和地方也逐渐普及开来。
Thus, the cooling tower is the most important even the only way of industrial water saving.
因此，冷却塔是工业节水最重要乃至唯一的途径。
The article analyses the principle, ways of saving water, water-saving amount, evaluation and way of saving water profit, and the internal relation among water-saving goal.
本文分析了节水规划应遵循的原则、节水途径、节水量、节水效益的评价内容与方法，以及与节水目标间的内在联系。
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