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在供水行業(yè)中，電能是在企業(yè)成本管理中*有挖掘潛力的一項(xiàng)，茂名市河?xùn)|水廠多年來(lái)始終把節(jié)能降耗工作放在位，并把耗電大戶供水泵房作為重點(diǎn)來(lái)抓，根據(jù)我廠的工藝流程，工程技術(shù)人員不段的采用新技術(shù)進(jìn)行積極的探索。在所有的供水泵房系統(tǒng)操作中，管網(wǎng)壓力是由水泵通過(guò)電動(dòng)機(jī)的拖動(dòng)產(chǎn)生的。
廈門岳航計(jì)算機(jī)工程有限公司
聯(lián)系人：李素云
企業(yè)QQ：2851195446，2851195466
手機(jī)：18965423501
座機(jī)：0592-5165501
根據(jù)流量Q與流量阻力h按阻力定律變化，
即：h=R×Q2(1)
水泵的功率N與水泵的揚(yáng)程和流量成正比，
即：N=H×Q×r/102(千瓦)(2)
式中：r-水的重度(公斤/立方米)H-水泵的揚(yáng)程(米)
Q-水泵的流量(立方米/時(shí))
從(2)水泵的H—Q曲線與(1)管網(wǎng)的阻力曲線相交，得出特性曲線圖2可見(jiàn)，若水泵額定轉(zhuǎn)速為n1，當(dāng)出口閥門全開(kāi)時(shí)，管道阻力為R1，這時(shí)的流量為Q1、揚(yáng)程為H1，水泵的工作在K1點(diǎn)效率，此時(shí)水泵功率N是Q1和H1的乘積與矩形H1-K1-Q1-O的面積成正比，如：當(dāng)關(guān)小了
水泵出口閥門的開(kāi)度，而當(dāng)流量減少為Q2時(shí)(如效率50%)，系統(tǒng)由原來(lái)的
工況點(diǎn)K1變到新的工況點(diǎn)K2，這時(shí)管道的阻力增加為R2，揚(yáng)程H1升高到H2，原矩形面積變?yōu)榫匦蜨2-K2-Q2-O面積，兩個(gè)矩形的面積相差不大，說(shuō)明通過(guò)調(diào)整閥門開(kāi)度來(lái)改變流量，水泵的功耗變化不大。換句話說(shuō)，通過(guò)開(kāi)關(guān)閥門進(jìn)行節(jié)流調(diào)節(jié)，并不能使功耗有效地減少。
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