摘要
针对流量调节方式中以节能为目的的变频调节,说明了其在分支管路流量控制领域中应用的局限性。首先,针对分支管路模型,通过分支管路阀门开度对分支管路流量控制性能的影响分析,论证了变频调节节能优势的减弱。其次,将离心泵的变频调速调节与节流调节进行比较,分析并证明了变频调节存在当流量较低时阀后压力过低,满足不了后续工艺要求的缺点。鉴于变频调节优点的减弱和依旧明显的缺点,最终得出结论:变频调节在分支管路流量控制的应用中存在一定局限性。
Aiming at the variable-frequency control ( VFC ) for the energy-saving among flow rate control methods, the VFC’s limitaion in controlling branch pipe flow was discussed , in which, having the impact of branch pipe valve ’ s opening on branch pipe flow control analyzed and the weakness of the energy -saving ad-vantage of variable-frequency control discussed;having centrifugal pump VFC compared with throttling regula-tion in the branch line model shows that the VFC encountering lower downstream pressure while the flow gets lower can ’ t meet requirements of the subsequent process , in this way , VFC has limitaion in branch pipe flow control.
出处
《化工自动化及仪表》
CAS
2014年第7期749-753,共5页
Control and Instruments in Chemical Industry
关键词
分支管路
流量调节
变频调节
节流调节
离心泵
brandch pipe,flow regulation,variable-frequency control,throttling regulation,centrifugal pump
