Category Archives: Solar

Solar Thermal ESOI (Energy Stored on Invested)

Posted on January 20, 2015 by

Barton, N. April 17, 2013. ESOI for solar thermal. http://sunoba.blogspot.com/2013/04/esoi-for-solar-thermal.html Published information is available to evaluate the ESOI score for the most common solar thermal storage technology – a molten 60-40 mixture of sodium and potassium nitrates, commonly known as … Continue reading →

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Solar Photovoltaics (PV) limited by raw materials

Posted on January 13, 2015 by

This paper (excerpts below) shows that there are limits to growth — there simply aren’t enough minerals in the world that can be produced physically and/or at a reasonable cost for the most popular kinds of PV being made now. … Continue reading →

Posted in Alternative Energy Resources, Photovoltaic Solar | Leave a comment

Distributed Generation is destabilizing the Electric Grid

Posted on January 10, 2015 by

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 →

Posted in Electric Grid, Photovoltaic Solar, Wind | Leave a comment

Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar Photovoltaics

Posted on December 17, 2014 by

Book review of “Spain’s Photovoltaic Revolution. The Energy Return on Investment”, by Pedro Prieto and Charles A.S. Hall. 2013.  Reviewed by Alice Friedemann, www.energyskeptic.com Olmedilla, Spain 60MW Solar Photovoltaic Power Plant. Source: SolarNovus Large Solar Installations around the world. Finally, … Continue reading →

Posted in Alternative Energy, Debt, Electric Grid, Energy, EROEI Energy Returned on Energy Invested, Photovoltaic Solar, Solar | Tagged , , , , | 5 Comments

Ivanpah Biggest solar power plant ever – $2.2 billion for only 100 MW

Posted on October 19, 2014 by

The $2.2 billion dollar Ivanpah Solar power plant generates 100 MW of power when you take the 25% capacity into account (not 400 MW).  That’s enough power for 25,000 to 50,000 homes (not 140,000 as claimed).  There are 116,700,000 households … Continue reading →

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Renewable incentives destabilize, harm electric grid

Posted on October 11, 2014 by

Wald, Matthew L.   7 Oct 2014. How Grid Efficiency Went South. New York times. Summary: 1) society would be better off if homeowners faced their rooftop solar panels westward, the peak time more energy is needed, but they won’t because … Continue reading →

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

Posted on March 3, 2014 by

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

Posted on March 1, 2014 by

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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The “Solar Revolution” is financial, not from new breakthroughs

Posted on December 3, 2013 by

Jeff Himmelman makes the case that the “solar revolution” is caused by new financial instruments and strategies in the New York Times August 9, 2012 article “Here Comes the Sell”: The innovation that has pushed Sungevity and the rest of … Continue reading →

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Photovoltaic solar has many problems

Posted on July 25, 2013 by

Although sunlight is renewable, photovoltaic panels aren’t. PV isn’t ready yet. NREL (National Renewable Energy Lab) lists the technical barriers below in: PV Roadmap. U.S. Dept of Energy National Center for Photovoltaics. Lack of widespread availability of low-cost feedstock and … Continue reading →

Posted in Photovoltaic Solar | Comments Off