Category Archives: EROEI Energy Returned on Energy Invested

Energy return of ultra-deepwater Gulf of Mexico oil and gas

Moerschbaecher, M., John W. Day Jr. October 21, 2011. Ultra-Deepwater Gulf of Mexico Oil and Gas: Energy Return on Financial Investment and a Preliminary Assessment of Energy Return on Energy. Sustainability 2011, 3, 2009-2026 [Excerpts from this 18 page paper … Continue reading

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Tar sand EROI 2013 Poisson and Hall

Alexandre Poisson, Charles A. S. Hall. 2013. Time Series EROI for Canadian Oil and Gas. Energies 2013, 6, 5940-5959 [ This is an extract from this 20-page paper. Tar sands are the hope offered by techno-optimists that a great deal … Continue reading

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How much net energy return is needed to prevent collapse?

[ Charles Hall, one of the founders of EROI methodology, initially thought an EROI of 3 was enough to run modern civilization, which is like investing $1 and getting $3 back. But after decades of research, Hall concluded an EROI … Continue reading

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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

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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

Posted in Alternative Energy, Alternative Energy Resources, Charles A. S. Hall, Debt, Electric Grid, Energy, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar, Solar EROI | Tagged , , , , , , , , | 26 Comments

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

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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

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Peak Oil in the Congressional record: Overview

Peak Oil in the Congressional record: Overview by Alice Friedemann, energyskeptic.com June 11, 2015 Even the most ardent techno-optimists and economists admit there are limited supplies of fossil fuels, but they insist we don’t need to worry for a long … 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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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

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