Difference between revisions of "Wind Power"

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=DTI on-shore wind speed database=
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Fluke commentary tends to focus on issues at the national rather than international level. If I lived in - say - Morocco, I would be considerably more excited about the potential of solar PV. But ''for the UK,'' wind power
  
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Previously the DTI published a database of average on-shore wind speeds at 10, 25 and 45 metres above ground level (AGL) for every square kilometre across the UK. Despite the obvious usefulness of this data, the project was discontinued and the website archived, some of the links are now broken and there is no guarantee this archived material will be retained. At the time the DT website was live, the data files were freely available - and as a public service Fluke is making these files available now:
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== On-shore wind generation ==
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Although now ubiquitous across the country, a cursory examination of the [https://en.wikipedia.org/wiki/List_of_onshore_wind_farms_in_the_United_Kingdom List of onshore wind farms] on Wikipedia reveal on-shore wind farms in the UK were/are:
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* Relatively small developments (single figures to a few dozen wind-turbines)
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* Relatively low capacity (many <10MW; most <100MW)
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* Construction dates in 1990's or 2000's
  
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* [http://windgod.fluke.org.uk/database-only.zip Original DTI ASC files]
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==DTI on-shore wind speed database==
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* [http://windgod.fluke.org.uk/database-and-program.zip Original DTI ASC files plus DTI software]
 
  
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Although the data files have a *.asc extension they are '''NOT''' [http://resources.esri.com/help/9.3/arcgisengine/java/GP_ToolRef/spatial_analyst_tools/esri_ascii_raster_format.htm ESRI compliant] rather they are simply readable plain text 'ascii' files. Fluke carried out some original work to convert the data files from the proprietary DTI format to ESRI-compliant ASC files which '''should''' be suitable for GIS software (they have been successfully tested with Autodesk AutoCAD Map 3D 2019)
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This data set is now moved to [[On-shore wind database]]
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* [http://windgod.fluke.org.uk/ESRISpeed10.asc 10 metres above ground level wind speed]
 
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* [http://windgod.fluke.org.uk/ESRISpeed25.asc 25 metres above ground level wind speed]
 
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* [http://windgod.fluke.org.uk/ESRISpeed45.asc 45 metres above ground level wind speed]
 
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For readers without GIS software interested in viewing the data, Fluke has produced a three page pdf showing a map of the UK colour-coded according to wind speed
 
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Index: Page 1 = 10m AGL; Page 2 = 25m AGL; Page 3 = 45m AGL
 
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Key: 1-3 m/s = dark grey; 3-6 m/s dull red; 6-7 m/s red; 7+ m/s yellow
 
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* [[Media:UK_onshore_windmap.pdf|UK average windspeed map]]
 
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* [[Media:ARCHIVED_CONTENT_Windspeed_Database_-_DTI.pdf |Archive copy of the DTI webpage. Includes references]]
 
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The original DTI website included a calculator to display the wind speed at three elevations for any OS grid reference; Fluke may replicate this here at a later date
 
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==Code for conversion DTI ASC to ESRI ASC==
 
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Readers interested in verifying the conversion are welcome to experiment with the following Microsoft Excel VBA code:
 
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    Sub convert()
 
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    Dim r As Range, i As Long, j As Long, s As String, t As String, x As Long
 
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    Dim TextFile As Integer
 
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    Dim FilePath As String
 
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    Set fs = CreateObject("Scripting.FileSystemObject")
 
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    Set a = fs.CreateTextFile("C:\path\to\required\folder\output.txt", True, False)
 
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    a.WriteLine "ncols 700"
 
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    a.WriteLine "nrows 1300"
 
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    a.WriteLine "xllcorner 0"
 
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    a.WriteLine "yllcorner 0"
 
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    a.WriteLine "cellsize 1"
 
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    a.WriteLine "nodata_value -9999"
 
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    Set r = Range("a1") 'original DTI ASC file copied into column A
 
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    For i = 2 To 9095 Step 7
 
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        t = ""
 
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        For j = 0 To 6
 
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            s = r(i + j, 1)
 
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            x = InStr(1, s, ";")
 
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            s = Mid(s, x + 2, 9999)
 
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            s = Replace(s, ";", " ")
 
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            t = t + s
 
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            If j < 6 Then t = t + " "
 
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        Next j
 
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        t = Replace(t, "  ", " ")
 
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        a.WriteLine t
 
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    Next i
 
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    'Save & Close Text File
 
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    a.Close
 
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    End Sub
 

Latest revision as of 12:14, 24 September 2021

Fluke commentary tends to focus on issues at the national rather than international level. If I lived in - say - Morocco, I would be considerably more excited about the potential of solar PV. But for the UK, wind power

On-shore wind generation

Although now ubiquitous across the country, a cursory examination of the List of onshore wind farms on Wikipedia reveal on-shore wind farms in the UK were/are:

  • Relatively small developments (single figures to a few dozen wind-turbines)
  • Relatively low capacity (many <10MW; most <100MW)
  • Construction dates in 1990's or 2000's

DTI on-shore wind speed database

This data set is now moved to On-shore wind database

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