Pressure-Time Flow Measurements Under Adverse Conditions

by Gerald A. Schohl, Tennessee Valley Authority, Norris, United States,



Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract:

Theoretical analyses suggest that the pressure-time method is capable of accurately determining flow rate in the short, varying cross section, 'semi-scroll' penstocks found in relatively low head main river hydro plants. The accuracy achieved should depend primarily on the accuracy to which the pipe factor is determined (the integrated length divided by cross-sectional area of a control volume defined for a pressure-time measurement) and the accuracy to which small pressure differences can be measured.



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