Comments on: Upwind Study: 20 MW Wind Turbines are on the Horizon http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/ Clean Tech News & Views: Solar Energy News. Wind Energy News. EV News. & More. Tue, 30 Dec 2014 18:14:00 +0000 hourly 1 http://wordpress.org/?v=4.0.1 By: BasM http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-212806 Tue, 04 Mar 2014 08:09:00 +0000 http://cleantechnica.com/?p=32770#comment-212806 The (energy of the) wind is taken away by the rotor upwind, so the contribution of the downwind rotor will be small (my rough estimation ~50%)

]]> By: Robbie Brady http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-204365 Fri, 17 Jan 2014 14:44:00 +0000 http://cleantechnica.com/?p=32770#comment-204365 So badly written- was this an 11 year-old’s homework?

]]> By: Eltorovive http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-108960 Sat, 10 Dec 2011 18:25:00 +0000 http://cleantechnica.com/?p=32770#comment-108960 That’s what I thought too but there is a US company that makes 2-bladed, downwind turbines. Less stress with two blades and a simple wind directed nacelle plus easy to install.
There is also is a floating version like this the Norwegians are already testing.
So again, double up the turbines onto one nacelle base with contra-rotating blades to cancel torque. Maybe the downwind side of the nacelle is stretched away from the tower and the upwind turbine gets the usual 3 blades.
That would look cool…

]]> By: Elliott Heimel http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-108956 Sat, 10 Dec 2011 15:54:00 +0000 http://cleantechnica.com/?p=32770#comment-108956 I wouldn’t be surprised if these gigantic Wind Turbines incorporate the Japanese “WindLens” Turbine Designs with the Inward Curving Ring around the Perimeter of the Turbine Blades to Increase the Focus of Airflow Speed through the Blade Zone by 2 to 3 Times. As a Bonus covering the outer blades with a Lens Shroud reduces the dreaded noise pollution.. http://energyreviewsinfo.com — Thanks for allowing me to review your Article and make a comment.

]]> By: Anonymous http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-108899 Fri, 09 Dec 2011 18:42:00 +0000 http://cleantechnica.com/?p=32770#comment-108899 There’s a problem with a prop behind the tower. The blades travel through a wind shadow caused by the tower and put strain on the system. That blade goes quickly from being fully loaded with wind, to no wind, and back to heavy wind. Lots of system stress on blades and bearings.

Some of the early turbine designs used aft-positioned blades and it wasn’t a good idea.

]]> By: Eltorovive http://cleantechnica.com/2011/12/09/upwind-study-20-mw-wind-turbines-are-on-the-horizon/#comment-108889 Fri, 09 Dec 2011 17:00:00 +0000 http://cleantechnica.com/?p=32770#comment-108889 Why not install a turbine upwind AND downwind on the same nacelle? This would make a 7mw almost into a 14mw wind turbine.
Foundations (pile driven or floating) are a huge cost offshore. Take advantage and double the turbine power on one base.

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