基于扬程自适应的机泵高效节能控制

A High Efficient Self-Adaptive Head-Based Control for Energy Saving of a Pump

针对静扬程时变的机泵取水高能耗问题,在综合分析机泵性能的基础上,给出了随工况动态变化的扬程自适应律(SAH),机泵运行工况与其静扬程及效率的关系图;并提出了系统约束条件下基于SAH律的调速节能控制法。通过SAH控制法可准确推算出当前工况高效运行点、匹配静扬程变化,使机泵工况点保持在满足相似工况的效率极大值曲线上,实现最大程度提高机泵运行效率节能降耗的目的。实验结果表明,相同的转速变化下,与按照额定转速最高效率点设计静扬程(DHHE)的调速控制法比较,SAH控制法节电效果更好;且当不同工况点流量满足一定的不等式关系时,取每千吨水节电幅度随转速降低而增加。

Aiming at the problem of high energy consumption of intake pump with time-dependent static head, the law of self-adaptive head （SAH） varied by the variation of operating condition is presented, which based on the integrated analysis of the pump＇s performance. The relation ship between the pump＇s operational condition and its efficiency and static head is also proposed. To achieve the lowest energy consumption performance, the variable-speed control method under the constrained condition is presented, which based on the law of SAH. Operation points of maximum efficiency could be deduced exactly by SAH control method, matching variation of static head to keep operation points on the curve of maximum efficiency which is consistent with the affinity laws. The object of energy saving could be achieved by SAH control method that improves the efficiency of pump in the maximal degree. The experimental result indicates that when the same variation of speed is considered, SAH control method is better than the conventional variable-speed control method which based on the law of design head according highest efficiency of nominal speed （DHHE） in the aspect of electricity saving effect, and the electricity saved of the pump per thousand ton water by the SAH control method increases with less pump speed when the flux of different conditions meets a inequality.