Identification of optimum working conditions in hydroelectric power plants for cavitation

Turbine faults in hydroelectric power plants not only reduce the operation time of the plant, but also cause a serious loss of income. One of the most important turbine faults is the turbine wheel wear caused by the cavitation and accordingly the other machine equipment faults which cause excessive...

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Bibliographic Details
Published in:Engineering failure analysis 2019-02, Vol.96, p.168-174
Main Authors: Kahraman, Gökhan, Yücel, Halit Lütfi, Taşgin, Yahya
Format: Article
Language:English
Subjects:
Cavitation
Hydroelectric power plant
Turbine wheel
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Summary:Turbine faults in hydroelectric power plants not only reduce the operation time of the plant, but also cause a serious loss of income. One of the most important turbine faults is the turbine wheel wear caused by the cavitation and accordingly the other machine equipment faults which cause excessive vibration. In this study, cavitation intensity that the turbines have been exposed in operating conditions has been investigated. As a result of the calculations, optimum working conditions of the units have been determined with graphs obtained in various operating conditions. The obtained data can be easily applied to all hydroelectric power plants exposed to cavitation, and safe operating conditions can be determined. •In hydropower plants, the severity of the cavitation event was investigated according to the net drop and downstream level.•In an 8-turbine hydraulic plant, it has been determined how many meters down the turbine should be operated to avoid the harmful effects of cavitation.
ISSN:1350-6307
1873-1961
DOI:10.1016/j.engfailanal.2018.09.037