Page 120 - Fluid Power Engineering

Sample Parameter ∗ Validation Criteria
Wind speed: horizontal
Max gust vs. average Max gust ≤2.5 m/s avg.
∗
40 m/25 m average ≤2.0 m/s
†
40 m/25 m daily max ≤5 m/s

40 m/10 m average ≤4 m/s

40 m/10 m daily max ≤7.5 m/s

Wind speed: redundant (Optional)
Average ≤0.5 m/s

Maximum ≤2.0 m/s

Wind direction
40 m/25 m average ≤20 ◦
All monitoring levels except where noted.
∗
† = Difference.
‡
In this sample, anemometer heights are 40, 25, and 10 m.
Source: Wind Resource Assessment Handbook: Fundamentals for Conducting a
Successful Monitoring Program, April 1997, created by AWS Scientific, Inc. on behalf
of the National Renewable Energy Laboratory, http://www.nrel.gov/wind/
pdfs/22223.pdf.
TABLE 6-5 Illustration of Relational Test Criteria for the Measured Quantities ‡

Sample Parameter ∗ Validation Criteria
Wind speed average (All sensor types)
1 h change <5.0 m/s

Temperature average
1 h change ≤5 C
◦
Barometric pressure average (Optional)
3 h change ≤1kPa

Δ Temperature (Optional)
3 h change Changes sign twice

∗ All monitoring levels except where noted.
Source: Wind Resource Assessment Handbook: Fundamentals for Conducting a
Successful Monitoring Program, April 1997, created by AWS Scientific, Inc. on
behalf of the National Renewable Energy Laboratory, http://www.nrel.
gov/wind/pdfs/22223.pdf.
TABLE 6-6 Illustration of Trend Test Criteria for the Measured Quantities

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