Delta / Zeeland trial - results update April 2009
The April update from the Delta / Zeeland trial has arrived, with the March data.
Zeeland%20small%20wind%20turbine%20testfield%20%28end%20Mar%202009%29.pdf
The energy consumption figures have been updated and some quite drastic downwards revisions have occurred. This is odd and I do not know why it has happened but it does not affect the trends.
The mystery of the zero power output from the Windwalker has been somewhat clarified with the note "the Windwalker was installed in January 2008 but has not operated".
The trend remains that the Ampair, Skystream, and Fortis are the good performing economic turbines with the Zephyr AirDolphin working well but being expensive.
The Ropatec 3kW seems to have gained a dramatic improvement and is now outperforming the Ropatec 6kW which is most odd. As an aside the planning permission request for a 6kW Ropatec at our local Tesco supermarket has just been withdrawn.
The Turby has now been repaired.
Sander Mertens of Ingenious has done some analysis of the site layout in the figure above (supplied by Fortis, courtesy Sander Mertens) in which the red line is the row of turbines which runs from NW to SE. It has been confirmed that in the spreadsheet the turbines are listed from NW to SE, so the 6kW Ropatec is at the North and the Windwalker is at the South. Since the wind direction is generally from the SW it might be thought that this slightly favours the most southerly turbines. However because of the housing estates to the SW and a belt of trees to the NE it turns out that the most northerly three turbines are the best located. Sanders has indicated the areas of wind obstruction in orange dots on the image.
Sander Mertens is speaking at the forthcoming International Small Wind Conference organised by the BWEA and BRE which is on 22, 23 April 2009 in Watford, London. It will be interesting to hear more about this trial.
Zeeland%20small%20wind%20turbine%20testfield%20%28end%20Mar%202009%29.pdf
The energy consumption figures have been updated and some quite drastic downwards revisions have occurred. This is odd and I do not know why it has happened but it does not affect the trends.
The mystery of the zero power output from the Windwalker has been somewhat clarified with the note "the Windwalker was installed in January 2008 but has not operated".
The trend remains that the Ampair, Skystream, and Fortis are the good performing economic turbines with the Zephyr AirDolphin working well but being expensive.
The Ropatec 3kW seems to have gained a dramatic improvement and is now outperforming the Ropatec 6kW which is most odd. As an aside the planning permission request for a 6kW Ropatec at our local Tesco supermarket has just been withdrawn.
The Turby has now been repaired.
Sander Mertens of Ingenious has done some analysis of the site layout in the figure above (supplied by Fortis, courtesy Sander Mertens) in which the red line is the row of turbines which runs from NW to SE. It has been confirmed that in the spreadsheet the turbines are listed from NW to SE, so the 6kW Ropatec is at the North and the Windwalker is at the South. Since the wind direction is generally from the SW it might be thought that this slightly favours the most southerly turbines. However because of the housing estates to the SW and a belt of trees to the NE it turns out that the most northerly three turbines are the best located. Sanders has indicated the areas of wind obstruction in orange dots on the image.
Sander Mertens is speaking at the forthcoming International Small Wind Conference organised by the BWEA and BRE which is on 22, 23 April 2009 in Watford, London. It will be interesting to hear more about this trial.
Labels: Delta wind trial; Zeeland windtest; urban microwind; Ampair; Zephyr; Renewable Devices Swift;, IEC 61400-2 small wind turbines edition 3 (CDV)
posted by David Sharman at 2:21 pm
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