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Increasing energy efficiency in water collection systems by submersible PMSM well pumps
Citation Link: https://doi.org/10.15480/882.2353
Publikationstyp
Journal Article
Date Issued
2018-09-22
Sprache
English
TORE-DOI
TORE-URI
Journal
Volume
10
Issue
10
Start Page
Art.-Nr. 1310
Citation
Water (Switzerland) 10 (10): 1310- (2018-09-22)
Publisher DOI
Scopus ID
Publisher
MDPI
Water collection based on groundwater abstraction has a high energy consumption that depends primarily on the operation and performance of submersible well pumps. The fact of the matter is that these machines still work with a global energy efficiency of less than 50%, and further investigations of the energy aspects in well pumps are needed. The present study introduces measures to increase the global efficiency of submersible well pumps linked to electrical energy savings. Common submersible pumps with asynchronous motors (ASMs) were compared with innovative permanent magnet synchronous motor (PMSM) technology in real well fields in Berlin and Hamburg waterworks. This study confirms that PMSM pumps showed a 6.8%-points higher global efficiency compared to ASM pumps at optimal working points. The investigation of the impact of well field operation on local pump efficiency offers an additional increase in the global efficiency. In this context, the influence of variable speed control on the global efficiency and the energy consumption was analyzed. Global efficiencies of over 70%, and potential energy savings of up to 20%, were determined for the speed-controlled PMSM pump. This offers water suppliers new incentives to optimize their water collection systems for less energy consumption.
Subjects
electrical submersible pumps
permanent magnet synchronous motor
variable-speed operation
optimizing working points
energy efficiency
water collection
DDC Class
620: Ingenieurwissenschaften
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water-10-01310.pdf
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