Rotary kinetic fluid motors or pumps – Method of operation
Patent
1998-04-21
2000-11-28
Ryznic, John E.
Rotary kinetic fluid motors or pumps
Method of operation
415 13, 415116, F01D 1700, F04D 3100
Patent
active
061526843
ABSTRACT:
A process for operating a hydraulic machine, especially a hydro-turbine, includes the step of detecting an actual machine state during operation of the machine by ascertaining operating data. The ascertained operating data includes flow through the turbine (if present), effective and reactive power fed into the electric mains, guide vane opening, pressure before the machine and at the suction pipe exit, headwater level, and tailwater level. The method further includes the step of processing at least one state characteristic values of a first cavitation characteristic value (indicative of cavitation intensity), a second cavitation characteristic value (indicative of an abrupt rise in cavitation manifestations), vibration characteristic values, suction pipe pressure, sand concentration, air pressure, water temperature, and generator temperature (for example winding temperature). The method also includes the step of altering an operating point of the machine based on the at least one processed characteristic value to reduce cavitation and/or quiet running.
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Experience With An Acoustic Cavitation Monitor For Water Turbines article from ImechE 1992 (5 pgs.).
Technische Universitat Wien--8. Internationales Seminar Wasserkraftanlagen; Nov. 1994 (13 pgs.).
Ferme Jean-Marc
Klein Joachim
Kopf Eberhard
Ryznic John E.
Voith Hydro, Inc.
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