Anemometer calibration

RNE-LA-VALLÉE
PARIS
GRENOBLE
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SOPHIA-ANTIPOLIS
µSE (Eiffel type) wind tunnel
at CSTB Nantes (France)
> ASSESSMENT
Anemometer
calibration
The CSTB offers
reliable, accurate
wind speed
measurement.
Wind speed measurement is essential to characterize
the wind energy-generating potential of a given
location in different weather conditions, and equally
essential for infrastructure safety. On construction
worksites for example, accurate wind speed
measurement is essential before erecting tower
cranes to avoid any risk of collapse. In other
sensitive locations, such as alongside high-speed
rail tracks and high-rise buildings, wind strength
is measured over a limited time window (using
a field measurement campaign) or continuously
(using a Meteo-France weather station) to monitor
and prevent strong wind such as storms.
in climatology, and on a range of advanced facilities,
including on-site sensors and the dedicated µSE
wind tunnel in Nantes.
Calibrations are carried out in the CSTB µSE
wind tunnel in Nantes in accordance with IEC
61400-12-1:2005/Annex F and the MEASNET
procedure. They are accredited by the French
accreditation body COFRAC as NF EN ISO/CEI
17025 compliant (see www.cofrac.fr, no.2-1930).
Wind measurement must be accurate and reliable.
Any variation in estimated wind levels can have
a very significant effect on the safety of people
and property, or on wind farm operating revenue.
CSTB support
The CSTB is a member of MEASNET, is COFRACaccredited, and offers industry professionals a range
of services to ensure successful outcomes for projects
involving wind resource, and projects where the
effects of wind are an issue. These services focus
on accurate and reliable anemometer calibration.
CSTB experts are able to rely on their expertise
Onsite measurement campaign mast with propeller anemometer
The CSTB is a member of MEASNET (MEASuring NETwork), the international network
for harmonized and recognized measurements in wind energy. It is one of nine MEASNET
laboratories that guarantee the quality of the anemometer calibration service they provide,
and are committed to uniform interpretation of standards and regulations in order to
ensure high quality calibration. Round robin tests are conducted to validate the robustness
of the procedures used.
Flow direction
Pitot
tube
Anemometer
The µSE open test section wind tunnel
The µSE wind tunnel provides laboratory conditions
under which to study the behavior of an anemometer
at full scale by reproducing its actual conditions
of use. It can generate wind speeds of up to 30 meters
per second.
Technical specifications
> Wind tunnel cross section: 0.79 m x 0.79 m (0.624 m2)
> x , y and z axis flows are uniform to within 0.2%
> Turbulence intensity is less than 2%
> Repeatability and reproducibility of µSE
measurements checked by reference anemometer
> A nemometer types calibrated: propeller and cup
> O utput types tested: voltage, current and frequency
> R eference wind speed measured with Pitot tubes
and pressure sensors
>M
EASNET (4-16 m/s) calibration and/or COFRAC
calibration (4-20 m/s)
> S onic anemometer performance assessment
(accreditation in progress).
References
- IEC 61400-12-1:2005 “Wind turbines – Part 12-1: Power
performance measurements of electricity producing wind
turbines, Annex F : Cup anemometer calibration procedure”
- MEASNET Measurement Procedure: “Cup anemometer
calibration procedure”, v2 2009
- ISO/IEC 17025:2005 “Exigences générales concernant la
compétence des laboratoires d’étalonnages et d’essais”
- ISO/CEI GUIDE 98-3:2008, “Incertitude de mesure - Partie 3 :
guide pour l’expression de l’incertitude de mesure” (GUM : 1995)
- NF ISO 5725-1 et 2:1994 “Exactitude (justesse et fidélité) des
NANTES OFFICE
C A P E ( C l i m a t o l o g i e - A é r o d y n a m i qrésultats
u e - Peto méthodes
l l u t i o n de
- mesure”
Épuration)
Anemometers being calibrated in the µSE wind tunnel
- Coquilla R. V., Obermeier J. , 2007, “Calibration procedure and
uncertainty in wind power anemometers“, Wind engineering ,
31, no. 5, 303-316
- Dahlberg J. Å., 2006, “An investigation of wind tunnel blockage
effects on cup anemometer calibrations“, Technical Report
FOI R-2006—SE (Swedish Defense Research Agency FOI)
- Eecen P.J., de Noord M., 2005, “Uncertainties in cup
anemometer calibrations” by ECN 05-066
- Sabre M., Jéhu A., Flori JP., Tétard Y., Brébion H., 2011,
“Qualification of the µSE CSTB-CAPE wind tunnel for
anemometer calibration“, EWEA 2011, Brussels, Belgium
11, RUE HENRI PICHERIT | BP 82341 | 44323 NANTES CEDEX 3
TEL. +33 (0)2 40 37 20 00 | FAX +33 (0)2 40 37 20 60 | www.cstb.fr/nantes/en/
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CAPE (Climatologie - Aérodynamique - Pollution - Épuration)
11, RUE HENRI PICHERIT | BP 82341 | 44323 NANTES CEDEX 3
TEL. +33 (0)2 40 37 20 00 | FAX +33 (0)2 40 37 20 60 | www.cstb.fr/nantes/en/
Contacts
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NANTES OFFICE
CAPE (Climatologie - Aérodynamique - Pollution - Épuration)
11, RUE HENRI PICHERIT | BP 82341 | 44323 NANTES CEDEX 3
TEL. +33 (0)2 40 37 20 00 | FAX +33 (0)2 40 37 20 60 | www.cstb.fr/nantes/en/
CENTRE SCIENTIFIQUE ET TECHNIQUE DU BÂTIMENT - SCIENTIFIC AND TECHNICAL CENTER FOR BUILDING
CENTRE SCIENTIFIQUE ET TECHNIQUE DU BÂTIMENT - SCIENTIFIC AND TECHNICAL CENTER FOR BUILDING
MARNE-LA-VALLÉE
MARNE-LA-VALLÉE
PARIS
PARIS
GRENOBLE
GRENOBLE
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SOPHIA-ANTIPOLIS
SOPHIA-ANTIPOLIS
| May 2015 | Design: Anaïs Peyre | Photo Credit: CSTB | Printed on eco-certified paper by Desbouis Gresil Imprimeur | 300 copies
CSTB Nantes
facilities: the µSE
wind tunnel