Wind Resource Grids

Wind Resource Grids

The Wind Resource Grids (WRG) provided by UL through Windnavigator give users the ability to do everything from siting met towers to designing preliminary layouts to obtaining preliminary estimates of the wind energy generated for small to multi-turbine wind projects. This data set will help you make informed decisions in the earliest stages of development.

Standard WRG (200 meter) deliverable

  • Format: WRG
  • Resolution: 200 m
  • Fixed 25 km x 25 km area
  • Choose your hub height (10 m to 140 m)
  • File includes elevation, roughness, wind speed distribution (Weibull A, k and sector-wise probability), and power density
  • Binary file (WRB)*

 

Improve project outcomes with the 50 m WRG data, which utilizes ERA5 reanalysis data

The 50 m WRG data sets are generated by Sitewind version 4, UL’s proprietary wind flow modeling system. This latest version of Sitewind utilizes Weather Research and Forecasting (WRF) numerical prediction modeling and incorporates ERA5 reanalysis data.

Our technical team has performed a validation effort comparing the use of ERA-Interim and ERA5 in UL’s WRGs. The results of this validation show that on average ERA5 performs better at most sites. If you are interested in reading more about this you can view the full validation presentation.

 

High-resolution WRG (50 m) deliverable

  • Format: WRF model WRG
  • Resolution: 50 m
  • Fixed 50 km x 50 km area up to 100 km x 100 km
  • Choose your hub height (10 m to 140 m)
  • File includes elevation, roughness, wind speed distribution (Weibull A, k and sector-wise probability), and power density
  • Binary file (WRB)*

*The binary file is designed to address the lack of precision in ACSII WAsP wind resource grids and the limitations of using Weibull A, k and sector-wise probability. The binary file is currently included with every Basic WRG purchase and contains the same point data as Basic WRGs plus inflow angle by direction. A WRB file is more precise than a WRG because it uses single precision floating point numbers to give precision to at least 6 decimal places.  The ASCII WRG format is only precise to 2 or 3 decimal places. This can result in rounding of wind speeds to as much as 0.3% or more.

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