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| A High Efficient Self-Adaptive Head-Based Control for Energy Saving of a Pump |
| He Zhongjie1, Peng Jianzhou2, Wang Xionghai1 |
| 1. Zhejiang University Hangzhou 310027 China 2. Hangzhou Electric Engineering Co. Ltd. Hangzhou 310027 China |
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Abstract 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.
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Received: 21 February 2008
Published: 18 February 2014
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2009, Vol. 24 
