Category Archives: Wind

Wind EROI range and payback time (also solar, NG, geothermal, hydro, coal)

[Clearly Energy Returned on Invested (EROI) research needs to have common standards because results vary by orders of magnitude. Taking the “average” is not going to produce the best guess because outliers skew the average up  substantially.  The EROI of … Continue reading

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900 Tons of material to build just 1 windmill

You ought to watch “MidAmerican Energy Company – From the Ground Up: Building our energy future, one turbine at a time“. The pictures from the video below are also powerful since they capture how low the EROI of wind power … Continue reading

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Dozens of Reasons Why Wind power Will Not Outlast Fossil Fuels

SCALE.  Too many windmills need to be built to replace oil. Worldwide, 32,850 wind turbines with 70 to 100 meter blades generating 1.65 MW built every year for the next 50 years, or 1,642,000 total would be needed to replace … Continue reading

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Material and other limits to scaling wind up to 24 GW by 2050

[Before you read this, check out the enormous amount of material and fossil energy required to build just one windmill.  ] Davidsson, S., Grandell, L., Wachtmeister, H., Höök, M. October 2014. Growth curves and sustained commissioning modelling of renewable energy: … Continue reading

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Offshore wind: Short-lived, Risky, Expensive, too big to go overland so new harbor manufacturing and vessels needed

[There are 2 documents about offshore wind power summarized below. Alice Friedemann, www.energyskeptic.com] Notes from:  U.S. Offshore Wind Manufacturing and Supply Chain Development. Prepared for the U.S. Department of Energy by Navigant Consulting. February 22, 2013, 191 pages. [My comment: … Continue reading

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Critique of LCA & EROI Wind research

[This paper criticizes  LCA and EROI wind studies] Notes from 22 page: Davidsson, S., Höök, M., Wall, G. 2012. A review of life cycle assessments on wind energy systems. The International Journal of Life Cycle Assessment.         … Continue reading

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Wind and Solar diurnal and seasonal variations require energy storage

Excerpts from 14 page: Mulder, F. M. 2014. Implications of diurnal and seasonal variations in renewable energy generation for large scale energy storage. Journal of Renewable and Sustainable Energy.  Large scale implementation of solar and wind powered renewable electricity generation … Continue reading

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Eastern Wind Integration & Transmission study 2011 National Renewable Energy Laboratory

Excerpts from the 242 page Eastern Wind Integration & Transmission study, 2011, EnerNex corporation for National Renewable Energy Laboratory. Key Findings Building transmission capacity takes much longer than installing wind plants. It is already starting to limit wind growth in … Continue reading

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Can wind power be scaled up to 24 TW by 2050?

[Below are excerpts from this 22 page paper. Alice Friedemann] Davidsson, S., et al. (2014) Growth curves and sustained commissioning modelling of renewable energy: Investigating resource constraints for wind energy. Energy Policy. Although the wind itself is a type of … Continue reading

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Building a national super grid in America

Building a national super grid in America by Alice Friedemann   June 3, 2015 A national supergrid is seen as essential for integrating renewable power into the electric grid. It is not clear if penetration of renewables beyond 33 or 50% … Continue reading

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