A GENERAL APPROACH USING THE THERMODYNAMIC EFFICIENCY METHOD FOR ABSOLUTE FLOW MEASUREMENT

Johannes Lanzersdorfer, L. Götsch

Abstract

Manufacturers of large-scale hydraulic machines face high liquidated damages if they can not meet performance guarantees due to contractual stipulations. Accurate determination of efficiency, power and flow is therefore of major interest. For plants exceeding heads of 100 m, the thermodynamic method represents the standard method. We present a mathematical refinement that uses additional power measurements to yield an analytical solution of the flow. Under favourable conditions, the measurement uncertainty is lower compared to that of other absolute flow measuring methods. With higher heads an even lower uncertainty can be expected.

Keywords

absolute flow measurement, thermodynamic, hydraulic

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IMEKO-TC9-2013-043.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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