Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves.
阐述了循环水泵变频调速的节能原理，提出离心 水泵相似定律的适用性和等效率曲线概念。
Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves.
阐述了循环水泵变频调速的节能原理，提出离心 水泵相似定律的适用性和等效率曲线概念。
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