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Category Archives: EROEI Energy Returned on Energy Invested
Why aren’t net energy and Energy Returned on Invested the basis of U.S. energy policy?
[ David Murphy doesn’t answer this question, but does give the history of EROI and more importantly, what this means for oil production and society. If we are going to spend money on fossil alternatives, wouldn’t it make sense to … Continue reading
Posted in EROEI Energy Returned on Energy Invested, U.S. Congress Energy Policy
Tagged energy policy, EROEI, EROI, net energy
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Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 1
Book review by Alice Friedemann at energyskeptic of “Spain’s Photovoltaic Revolution. The Energy Return on Investment”, by Pedro Prieto and Charles A.S. Hall. 2013. Springer. Conclusion: the EROI of solar photovoltaic is only 2.45, very low despite Spain’s ideal sunny … Continue reading
A review of life cycle assessments on wind energy systems by Simon Davidsson 2012
[below is a very short excerpt of this 22 page paper, I was interested in how much recycling can contribute to a high EROI but there are many other important points made in this paper] Davidsson, S., Höök, M., Wall, … Continue reading
Posted in Wind EROI
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Implications of declining EROI on oil production 2013 by David J. Murphy
[ To “see” declining EROI and the end of cheap energy, check out these photos of The Tallest structure ever moved by Mankind, a Norwegian natural gas offshore platform ] Murphy, David J. December 2, 2013. The implications of the … Continue reading
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
Posted in EROEI Energy Returned on Energy Invested, Wind
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Mined Oil sands EROI 5, in-situ 2.9, or 1 if refinement, transportation, & environmental costs included
Nuwer, R. Feb 19, 2013. Oil Sands Mining Uses Up Almost as Much Energy as It Produces. InsideClimate News. EROI SURFACE MINED oil sands (20% of reserves) EROI 5 according to J. David Hughes research released Tuesday. EROI 5.5 to … Continue reading
Posted in EROEI Energy Returned on Energy Invested, Tar Sands (Oil Sands)
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EROI negative for Coal-to-Liquids (CTL) at Shenuha Direct Coal Liquefaction plant
Kong, Z. et al. 23 January 2015. EROI Analysis for Direct Coal Liquefaction without and with CCS: The Case of the Shenhua DCL Project in China. Energies 8(2): 786-807. Many nations see coal-to-liquids (CTL) as a way to avoid … Continue reading
Posted in Coal to Liquids (CTL), EROEI Energy Returned on Energy Invested
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Large agribusiness gets corporate welfare via illegal ethanol subsidies
What more proof is needed that the Energy Returned on Energy Invested of ethanol is negative? They’re losing money and getting corporate welfare to keep the scam going, meanwhile destroying prime topsoil, poisoning the land with pesticides, and eutrophying the … Continue reading
Posted in Biofuels, EROEI Energy Returned on Energy Invested
Tagged agribusiness, biodiesel, EROEI, ethanol, illegal, subsidies
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Energy return on investment, peak oil, and the end of economic growth
David J. Murphy and Charles A. S. Hall. 2011. Energy return on investment, peak oil, and the end of economic growth in “Ecological Economics Reviews.” Robert Costanza, Karin Limburg & Ida Kubiszewski, Eds. Annals of the New York Academy of … Continue reading
Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, EROEI remaining oil too low, How Much Left, Peak Oil, Scientists
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Charles Hall on EROEI
[ For a full understanding of EROI, which Hall invented in 1973 as a way of evaluating which energy resources could best replace fossil fuels, see Hall’s latest book: Hall, Charles A.S. 2017. Energy Return on Investment: A Unifying Principle … Continue reading
Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, EROEI remaining oil too low
Tagged EROEI, EROI, Hall
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