The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small...
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Transcript of The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small...
![Page 1: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/1.jpg)
The Proven 15 kW turbine; designed for reliability and
performance
EWEC Athens 2006, CW32. Small wind turbine systems.
Proven Energy Ltd., Johnnie Andringawww.provenenergy.com
![Page 2: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/2.jpg)
Next 15 minutes
• Products & company• Turbine design & safety• 15 kW blade development
– Blade material– Moulds and process– Blade tests
• Further Development• Turbine performance• Status
![Page 3: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/3.jpg)
Products
• First turbine Rannoch Moor, now, 17 years later still up & running
• 2.5 and 6 kW• Transition from off-
grid to on-grid• Household and
professional customers
![Page 4: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/4.jpg)
Company
• Based in Scotland; high winds and many remote islands• Export to over 30 countries• 2005; 150 turbines, growing over 50% year on year
![Page 5: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/5.jpg)
Turbine design
• Simplicity: reliability• Direct drive• PM generator, no
rotating coil• Brake disk• Downwind, passive yaw• Low rpm; tip speed < 65
m/s; low noise
![Page 6: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/6.jpg)
Safety mechanism
• Passive pitch: elastic hinge with prestressed springs• Blades cone downwind
![Page 7: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/7.jpg)
15 kW development
• Same concepts as smaller turbines
• Basic numbers:– 9.5 m diameter– 95 …160 rpm– rated 11 m/s– Blade: twintex; 15 kg each
• Development started 3 years ago
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Blade development
• 2.5 kW; full PolyPropylene as blade material– Tough and non-sticky
• 6 kW; wood epoxy– Manufacturing of larger shapes– Vulnerable (impact)
• 15 kW started with glass-epoxy
• ended with twintex (Glass with PP matrix)– As above and ‘recyclable’; melt PP from glass– However; ‘NEW’ material and process
![Page 9: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/9.jpg)
Moulds
• Elevated temperature; expensive moulds
![Page 10: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/10.jpg)
Process• Filling of mould• Blade has a rib• Vacuum forming in
oven
![Page 11: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/11.jpg)
Blade testing
• Hinged blade; low bending moments (IEC)
• Static tensile & bending test
• Same design, same mould– Improvements in
production– Over 3-fold increase in
critical strength– More consistent quality
![Page 12: The Proven 15 kW turbine; designed for reliability and performance EWEC Athens 2006, CW32. Small wind turbine systems. Proven Energy Ltd., Johnnie Andringa.](https://reader034.fdocuments.us/reader034/viewer/2022051517/56649f225503460f94c3adaf/html5/thumbnails/12.jpg)
Further development
• Hub, Generator, Controller, Automatic brake• Covers are designed; styling of turbine
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Turbine Performance
• Theoretical / experimental analysis of springs• Optimise power curve and safety mechanism
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Status• PERFORMANCE was
achieved early• Establishing RELIABILITY
took longer, – especially with new production
process – Now entering final 6 months
live cycle test– Full scale production starts
2007• IEC 61400/2 standard and
procedures helpful