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Study suggests arrays of closely-spaced counter-rotating vertical-axis wind turbines could enhance power density of wind farms by up to an order of magnitude

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Dabiri suggests using optimized arrays of smaller vertical-axis wind turbines to increase the power density and reduce the cost, and visual, acoustic, radar and environmental impacts, of wind farms using giant horizontal-axis turbines. constraint limits the amount of power that can be extracted from a given wind farm footprint.

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GE using Large Eddy Simulation on Sandia’s Red Mesa to lay groundwork for quieter wind turbine blades with better power yield

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Transition of flow to turbulence on a wind-turbine airfoil; isosurfaces of vorticity from a Large Eddy Simulation (LES). In a 2011 survey of techniques to reduce wind turbine blade noise, Sandia researcher Matthew Barone noted that: There are two primary classes of noise sources on a wind turbine. Click to enlarge.

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Cascadia Capital forecasts flurry of MA and commercialization in clean tech in 2011; US Congress to discard Cap and Trade

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energy sector will spur a flurry of M&A and investment activity in 2011 as renewable energy. Sustainable Industries Predictions for 2011 include: Cap and Trade Discarded by Congress in National Energy Policy. energy will be ready for commercialization in 2011, with companies like Plasco Energy. technologies mature.

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GE Energy Acquires ScanWind for Offshore Wind Sector Expansion

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ScanWind is a developer of advanced drive train and control wind turbine technologies aimed at offshore deployment. First offshore prototypes were to be installed in 2011. The ScanWind turbine technology will join GE’s family of wind turbines that includes the GE 1.5-megawatt The GE wind portfolio also includes the 2.5

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MIT study: half of US deaths related to air pollution are linked to out-of-state emissions

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In general, the researchers find that when air pollution is generated in one state, half of that pollution is lofted into the air and carried by winds across state boundaries, to affect the health quality of out-of-state residents and increase their risk of early death. Early-death source–receptor matrices for 2011. and/or ozone.

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Xcel Terms First Phase of Sodium-Sulfur Battery Wind Energy Storage Test Project Successful

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Xcel Energy has released the preliminary results from its wind-to-battery (W2B) storage project in Minnesota, and termed the technology successful. In October 2008, Xcel began testing a one-megawatt sodium-sulfur (NaS) battery ( earlier post ) to demonstrate its ability to store wind energy and move it to the electricity grid when needed.

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AMSC Power Electronics Support Nearly 10% of Global Wind-Generated Electricity

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American Superconductor Corporation ( AMSC ), a global power technologies company, announced in conjunction with Global Wind Day 2010 on 15 June that it has achieved a significant milestone by supporting the production of more than 15,000 megawatts (MW) of wind power worldwide with its proprietary power electronic solutions.

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