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Examples of Benefits from Efficiency Evaluation Using Comparative Tests
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Hydropower)
2014 (English)In: 10th International Conference on Hydraulic Efficiency Measurements 2014-09-16 - 19, Itajubá, Brazil, 2014Conference paper (Refereed)
Abstract [en]

Traditionally, most field efficiency measurements are made to verify guarantees for a new project, which have led to that this issue is well covered by standardization guidelines. There are however several other situations where information from field efficiency measurements contributes with value. Depending on issue and site characteristics, there are several feasible options, that are not described in current standards of primary methods.

A comparative test is here defined as a test where efficiency is evaluated at the same flow conditions but with modified or changed turbine or water conduits. At an efficiency evaluation of a comparative test, many systematic uncertainties will cancel, and the overall evaluation of uncertainty will be at a very useful level. 

This paper presents experiences of the hydropower producer Vattenfall, from several efficiency tests, where different types of comparative tests settings have been used.

Place, publisher, year, edition, pages
National Category
Water Engineering Energy Engineering
Research subject
Engineering Science with specialization in Science of Electricity
URN: urn:nbn:se:uu:diva-233779OAI: oai:DiVA.org:uu-233779DiVA: diva2:754287
10th International Conference on Hydraulic Efficiency Measurements 2014-09-16 -- 19, Itajubá, Brazil
Available from: 2014-10-10 Created: 2014-10-10 Last updated: 2014-10-17Bibliographically approved

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Dahlback_Norrlund_IGHEM2014(1035 kB)73 downloads
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