EHD2010L;
EHD2010L現貨;
EHD2010L供應。
風機、水泵設備通常是以流量為控制對象的。傳統的流量控制方法是閥門/擋板控制法,即通過關小和開大閥門/擋板的開度來調節流量。閥門控制法的實質是通過改變管網阻力大小來改變流量。因此,這種控制方式當所需流量減少時,壓力反而會增加,故軸功率的降低有限,此時,過剩的風機、水泵功率將導致壓力增加而白白浪費掉了。
風機、水泵節電器可在保持閥門/擋板開度不變的前提下,通過改變風機、水泵的轉速來調節流量,其實質是通過減少流體動力來節電。
由流體力學理論可知,流量與轉速的一次方成正比,壓力與轉速的平方成正比,軸功率與轉速的三次方成正比。
因此,采用風機、水泵節電器這種控制方式時,當所需流量減少時,軸功率將顯著降低。例如,當流量下降到80%,轉速也下降到80%時,軸功率將下降為額定功率的51%。這種控制方式可從根本上消除風機、水泵設備由于選型或負荷變化普遍存在的“大馬拉小車”的動力浪費現象,消除了擋板節流阻力,使風機、水泵始終運行在工作狀態。
風機、水泵節電器的平均節電率為30%-60%,具有投資回收期短,受益期長等特點,是現代風機、水泵控制之理想設備。
18. 國以民為本,民以食為天。(西晉陳壽三國志)
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