Category Archives: EROEI Energy Returned on Energy Invested

Murphy & Hall 2011 Adjusting the economy to the new energy realities of the second half of the age of oil

Posted on March 18, 2017 by

[ Below are excerpts from this 5 page paper, slightly rearranged, go here to see all of the text, figures, and tables.   Alice Friedemann   www.energyskeptic.com  author of “When Trucks Stop Running: Energy and the Future of Transportation, 2015, Springer] Murphy, … Continue reading →

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, How Much Left | Tagged , , | 2 Comments

EROI explained and defended by Charles Hall, Pedro Prieto, and others

Posted on February 21, 2017 by

[ If you found this post interesting, the following posts are even better (more detailed and in-depth): Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 1 Tilting at Windmills, Spain’s disastrous attempt to replace … Continue reading →

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Pedro Prieto | Tagged , , , | 3 Comments

Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2

Posted on January 26, 2017 by

[ Pedro Prieto presented an update on June 20, 2017 at the International Society for Biophysical Economics “Spain’s Solar Revolution Revisited: six years later” here: Pedro-Prieto_ISBPE_2017-Spains-solar-revolution-revisited.pdf.   See the pdf for more information Losses in book overestimated and revised Before / … Continue reading →

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EROI of Canadian Natural Gas. A peak was reached despite enormous investment

Posted on January 7, 2017 by

[ Although I’ve extracted much of this paper, it is not complete—there are missing equations, figures, tables, and text– so see the paper for details (it is available online).  I’ve rearranged the order of the paper.  The conclusion is just … Continue reading →

Posted in EROEI Energy Returned on Energy Invested, Natural Gas, Peak Natural Gas | Tagged , | 4 Comments

Are biofuels a sustainable and viable energy strategy?

Posted on November 9, 2016 by

Preface. In 2000, Melanie Kenderine at the U.S. Department of energy stated that: “This nation has abundant biomass resources (grasses, trees, agricultural wastes) that have the potential to provide power, fuels, chemicals and other bio-based products” (136). That’s a good … Continue reading →

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California oil EROI dropped from 6.5 to 3.5 by 2005

Posted on May 30, 2016 by

Brandt, A. R. October 12, 2011. Oil Depletion and the Energy Efficiency of Oil Production: The Case of California. Sustainability 2011, 3, 1833-1854 [ Brandt estimates the energy return on investment (EROI) dropped from ~6.5 in 1955 to ~3.5 fifty … Continue reading →

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Hall and Lambert: EROI of different fuels and the implications for society

Posted on May 27, 2016 by

[ Excerpts from the Hall, Lambert, and Balogh EROI paper. You may want to read the original paper here since I’ve left out charts, figures, and text.  In my opinion, EROI is important because it is  due diligence – society ought to … Continue reading →

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

Posted on May 24, 2016 by

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 →

Posted in EROEI Energy Returned on Energy Invested, Threats to oil supply | Tagged , , , , , | 1 Comment

Tar sand EROI 2013 Poisson and Hall

Posted on May 21, 2016 by

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 →

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Tar Sands (Oil Sands) | Tagged , , , | 1 Comment

How much net energy return required to prevent collapse?

Posted on May 15, 2016 by

Preface. 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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