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| Application of frequency conversion project in drainage pumping stations and discussion of energy-conserving mechanism |
| YUAN Yun, YU Sai-feng, LIN Lei, ZHANG Li-min |
| Ningbo Municipal Sewage Treatment Co., Ltd., Ningbo, Zhejiang 315040, China |
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Abstract An overview of frequency converter and frequency conversion technique of pumps is given.The application of frequency-conversion technique in water-supplying and drainage pumping stations,and energy-conserving mechanism of frequency conversion in drainage pumping stations are discussed.The application of frequency-conversion project over sewage pumps in three drainage pumping stations in Ningbo is studied.The three pumping stations are all sewage ones and the lift of the pumps has an excessive amount.From the data on unit draining energy consumption it demonstrates that electricity saving rate of frequencyconversion projects reaches 25%~35% during non-flood season.Annual electricity saving rate exceeds 20%,showing a fine application future of frequency-conversion project.
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Received: 08 August 2013
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