Turbine Efficiency Measurements by the Pressure-Time and the Current-Meter Method at Paugan

by Pierre A. Lamy, Hydro-Quebec, Canada,

Document Type: Proceeding Paper

Part of: Waterpower '89


Paugan generating station was built in the 1920s. Although the generators were converted from 25 Hz to 60 Hz in the mid 1950s, the original runners were in place until recently when a runner replacement program was initiated and newly-designed runners were gradually installed to increase overall output and optimize turbine efficiency. Initial flow and efficiency measurements were performed on unit No. 4, which was chosen to quantify the overall gain achieved. This unit was tested both before and after runner replacement using the pressure-time method for turbine flow measurement. Flow and efficiency measurements were eventually done on unit No. 3 also equipped with a new runner. Turbine flow was measured this time by the current-meter method. Neither unit presented physical conditions particularly favorable for either pressure-time or current-meter flow measurements. Study results are discussed.

Subject Headings: Power plants | Turbines | Pressure measurement | Hydro power | Pressurized flow | Field tests | Flow measurement | Flow duration | Canada

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