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Winter-Kennedy method in hydraulic discharge measurement: Problems and Challenges
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-5833-6736
Institut de recherche d’Hydro-Québec.
Norwegian University of Science and Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-7599-0895
2016 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Winter Kennedy (WK) method is a popular way to measure the relative discharge and thus efficiency in Swedish hydropower plants. This is largely motivated by the numerous low head turbines and low cost of the method. WK is an index testing method that provides relative values of hydraulic efficiency by measuring differential pressures in one or two pairs of pressure taps in radial planes of the spiral casing. The method is described in the IEC41 standard. Despite several limitations, it is generally used to verify the increment in efficiency for refurbishment projects and sometimes for the continuous flow rate monitoring. Uncertainties in the results reaching up to 5% have been reported in different researches. Those are often attributed to a change in flow conditions after the refurbishment or in the course of time. However, a proper error analysis has not been performed yet. This paper includes a review of the available literature related to the topic to understand its problems and possible ways to investigate its limitations systematically.

Place, publisher, year, edition, pages
2016. article id 12
National Category
Energy Engineering Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-65053OAI: oai:DiVA.org:ltu-65053DiVA, id: diva2:1131434
Conference
11th International conference on hydraulic efficiency measurement (IGHEM2016), Linz, Austria, 24-26 August, 2016
Available from: 2017-08-14 Created: 2017-08-14 Last updated: 2017-11-29Bibliographically approved

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fulltext(906 kB)38 downloads
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Baidar, BinayaCervantes, Michel

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CiteExportLink to record
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