The maximum operating efficiency of a centrifugal pump is different when it is parallel operated with different pumps. To study the reduction in the maximum operating efficiency of pumps in parallel operation compared with their rated efficiency, 28 pairs of pumps with the same rated head and different rated flows were tested orthogonally in parallel operation. A determination of the pumps operating flow and head was done to calculate the maximum operating efficiency in different combinations. The results showed that the maximum operating efficiency of a pump in parallel operation was higher than 85% of rated efficiency when the flow ratio of two pumps was within 1.6. When the flow ratio was increased to 2.0, the maximum operating efficiency of the pump will sharply decline to 70% of rated efficiency or less. Therefore, the operating efficiency a pump can keep is 70% or more under the condition that the flow ratio between the pumps is less than 2.
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June 2010
Technical Briefs
The Relationship Between the Maximum Efficiency and the Flow of Centrifugal Pumps in Parallel Operation
Yi Wen,
Yi Wen
College of Environmental Science and Engineering,
e-mail: wenyiwenyi@126.com
South China University of Technology
, Guangzhou Higher Education Mega Centre, Panyu District, Guangzhou, Guangdong 510006, P. R. China
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Xiaochu Zhang,
e-mail: zhangxiaochu@126.com
Xiaochu Zhang
Guangdong Pearl River Commercial and Logistics Investment Co., Ltd.
, Pearl River Investment Building 421, East Zhujiang Road, Zhujiang New Town, Guangzhou, Guangdong 510623, P. R. China
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Pu Wang
Pu Wang
Faculty of Urban Construction and Environment Engineering,
e-mail: wpu2120@126.com
Chongqing University
, Chongqing 400045, P. R. China
Search for other works by this author on:
Yi Wen
College of Environmental Science and Engineering,
South China University of Technology
, Guangzhou Higher Education Mega Centre, Panyu District, Guangzhou, Guangdong 510006, P. R. Chinae-mail: wenyiwenyi@126.com
Xiaochu Zhang
Guangdong Pearl River Commercial and Logistics Investment Co., Ltd.
, Pearl River Investment Building 421, East Zhujiang Road, Zhujiang New Town, Guangzhou, Guangdong 510623, P. R. Chinae-mail: zhangxiaochu@126.com
Pu Wang
Faculty of Urban Construction and Environment Engineering,
Chongqing University
, Chongqing 400045, P. R. Chinae-mail: wpu2120@126.com
J. Pressure Vessel Technol. Jun 2010, 132(3): 034501 (2 pages)
Published Online: April 21, 2010
Article history
Received:
December 24, 2007
Revised:
January 13, 2010
Online:
April 21, 2010
Published:
April 21, 2010
Citation
Wen, Y., Zhang, X., and Wang, P. (April 21, 2010). "The Relationship Between the Maximum Efficiency and the Flow of Centrifugal Pumps in Parallel Operation." ASME. J. Pressure Vessel Technol. June 2010; 132(3): 034501. https://doi.org/10.1115/1.4001141
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