Category Archives: Wind

Wind turbines hit limits to growth before 50% wind power penetration

Material requirements of 50% wind power in the USA hit limits to growth Also see Davidsson, S., et al. 2014. Growth curves and sustained commissioning modelling of renewable energy Investigating resource constraints for wind energy. Energy Policy. Wind turbines can’t … Continue reading

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Wind’s dirty secret: it goes on vacation in the summer

  Figure 1. Summer wind across the USA is nearly all sluggish Class 3 (light blue), Class 2 (orange) or class 1 (blank) (NREL). Someday wind and solar will need to contribute over 50% of power due to declining fossil … Continue reading

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Wind power capacity value — effective load carrying capability (ELCC)

NREL. 2008. Determining the Capacity Value of Wind: An Updated Survey of Methods and Implementation. National Renewable Energy Laboratory. Electric systems must have sufficient reserves so that resources are adequate to meet customer demand. Because electricity demand cannot be known … Continue reading

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Is there enough renewable energy to replace fossil fuel electricity generation?

NREL. July 2012. U.S. Renewable Energy Technical Potentials: A GIS-Based Analysis. National Renewable Energy Laboratory. This document is a thought experiment that uses GIS mapping to estimate how much renewable power could possibly be generated in each state regardless of … Continue reading

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Distributed Generation is destabilizing the Electric Grid

Electricity distribution is designed to flow one way from a centralized system to customers. But Distributed Generation (DG) from solar  PV and wind violates this. Impacts caused by high penetration levels of intermittent renewable DG can be complex and severe … Continue reading

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Robert Wilson: Can You Make a Wind Turbine Without Fossil Fuels?

Can You Make a Wind Turbine Without Fossil Fuels? February 25, 2014 by Robert Wilson @ theenergycollective.com Reworded Excerpts: The current feasibility of 100% renewable energy is easily tested by asking a simple question. Can you build a wind turbine … Continue reading

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Wind power will not save us

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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The Oiliness of Everything: Invisible Oil and Energy Payback Time.

The Oiliness of Everything: Invisible Oil and Energy Payback Time. By Alice Friedemann, August 23, 2014. Just as fish swim in water, we swim in oil.  You can’t understand the predicament we’re in until you can see the oil that … Continue reading

Posted in Alternative Energy, An Overview, Antecedents, EROEI Energy Returned on Energy Invested, Wind | 7 Comments

Science : No single or combination of alternative energy resources can replace fossil fuels

Experts question new energy sources. Oct 31, 2002. AP. (APOnline) — None of the known alternate energy sources are technically ready to take the place of fossil fuels experts say in a new study: Martin Hoffert, et al 2002 Advanced … Continue reading

Posted in Alternative Energy, Fusion, Nuclear Power, Solar, Wind | 1 Comment

Wind & Solar need thousands of tons of steel, aluminum, cement, concrete, copper but produce little energy

Summary of Sergio Pacca and Darpa Horvath 2002 Greenhouse Gas Emissions from Building and Operating  Electric Power Plants in the Upper Colorado River Basin ENVIRONMENTAL SCIENCE & TECHNOLOGY / VOL. 36, NO. 14 pp. 3194-3200 As you can see, Wind … Continue reading

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