Uncertainties for pressure-time efficiency measurements
In connection with the pressure-time project at the Norwegian University of Science and Technology and Luleå University of Technology, a number of tests with the pressure-time method have been performed at the Waterpower Laboratory in Trondheim, Norway. The aim is to lower the uncertainty and improv...
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Luleå tekniska universitet, Strömningslära och experimentell mekanik
2010
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ftluleatu:oai:DiVA.org:ltu-27801 2023-05-15T17:09:11+02:00 Uncertainties for pressure-time efficiency measurements Ramdal, Jørgen Jonsson, Pontus Dahlhaug, Ole Gunnar Nielsen, Torbjørn Cervantes, Michel 2010 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-27801 eng eng Luleå tekniska universitet, Strömningslära och experimentell mekanik Norwegian University of Science and Technology (NTNU), Trondheim The 8th International Conference on Hydraulic Efficiency Measurement http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-27801 Local 159df440-f221-11df-8b36-000ea68e967b info:eu-repo/semantics/openAccess Fluid Mechanics and Acoustics Strömningsmekanik och akustik Conference paper info:eu-repo/semantics/conferenceObject text 2010 ftluleatu 2022-10-25T20:51:26Z In connection with the pressure-time project at the Norwegian University of Science and Technology and Luleå University of Technology, a number of tests with the pressure-time method have been performed at the Waterpower Laboratory in Trondheim, Norway. The aim is to lower the uncertainty and improve usability of the method. Also a field test at the Anundsjoe power plant in Sweden has been performed. The pressure-time measurement is affected by random uncertainty. To minimize the effect of the random behavior it is found that a correct integration end limit in the integration of the differential pressure is essential. An analysis using 100 different end points for integration show a possible random error as large as 0.6%. A filtration method for finding an appropriate end point is developed and presented. In laboratory, the random behavior of the method can be described since many tests can be performed. During field measurements, this may not be feasible. However, the random uncertainty can be included if the efficiency curve can be described by polynomial regression curves. This method is presented with the Anundsjoe Power Plant measurements. Godkänd; 2010; 20101117 (ponjon) Conference Object Luleå Luleå Luleå Luleå University of Technology Publications (DiVA) Norway |
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Open Polar |
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Luleå University of Technology Publications (DiVA) |
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ftluleatu |
language |
English |
topic |
Fluid Mechanics and Acoustics Strömningsmekanik och akustik |
spellingShingle |
Fluid Mechanics and Acoustics Strömningsmekanik och akustik Ramdal, Jørgen Jonsson, Pontus Dahlhaug, Ole Gunnar Nielsen, Torbjørn Cervantes, Michel Uncertainties for pressure-time efficiency measurements |
topic_facet |
Fluid Mechanics and Acoustics Strömningsmekanik och akustik |
description |
In connection with the pressure-time project at the Norwegian University of Science and Technology and Luleå University of Technology, a number of tests with the pressure-time method have been performed at the Waterpower Laboratory in Trondheim, Norway. The aim is to lower the uncertainty and improve usability of the method. Also a field test at the Anundsjoe power plant in Sweden has been performed. The pressure-time measurement is affected by random uncertainty. To minimize the effect of the random behavior it is found that a correct integration end limit in the integration of the differential pressure is essential. An analysis using 100 different end points for integration show a possible random error as large as 0.6%. A filtration method for finding an appropriate end point is developed and presented. In laboratory, the random behavior of the method can be described since many tests can be performed. During field measurements, this may not be feasible. However, the random uncertainty can be included if the efficiency curve can be described by polynomial regression curves. This method is presented with the Anundsjoe Power Plant measurements. Godkänd; 2010; 20101117 (ponjon) |
format |
Conference Object |
author |
Ramdal, Jørgen Jonsson, Pontus Dahlhaug, Ole Gunnar Nielsen, Torbjørn Cervantes, Michel |
author_facet |
Ramdal, Jørgen Jonsson, Pontus Dahlhaug, Ole Gunnar Nielsen, Torbjørn Cervantes, Michel |
author_sort |
Ramdal, Jørgen |
title |
Uncertainties for pressure-time efficiency measurements |
title_short |
Uncertainties for pressure-time efficiency measurements |
title_full |
Uncertainties for pressure-time efficiency measurements |
title_fullStr |
Uncertainties for pressure-time efficiency measurements |
title_full_unstemmed |
Uncertainties for pressure-time efficiency measurements |
title_sort |
uncertainties for pressure-time efficiency measurements |
publisher |
Luleå tekniska universitet, Strömningslära och experimentell mekanik |
publishDate |
2010 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-27801 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_relation |
The 8th International Conference on Hydraulic Efficiency Measurement http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-27801 Local 159df440-f221-11df-8b36-000ea68e967b |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766065154011693056 |