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Tag Archives: EROEI
No, we’re not going to make ethanol out of CO2 and stop global warming
Preface. In the article below Robert Rapier debunks the research paper proposing to convert CO2 into ethanol. The researchers were honest and said “that the process is unlikely to be economically viable.” But the press spun it into a major … Continue reading
Posted in Biofuels, Biomass EROI, Critical Thinking, Far Out, Other Experts
Tagged critical thinking, EROEI, ethanol
2 Comments
Minerals: Natural gas from Ugo Bardi’s “Extracted”
Preface. This is just a small sampling of what Bardi thinks might happen post fossil fuels, mostly shortened and reworded. Here are 7 other posts from this great book: Mining: Waste, Pollution, Destruction Ugo Bardi predictions of the future Minerals … Continue reading
Posted in EROEI Energy Returned on Energy Invested, Oil & Gas Fracked
Tagged EROEI, EROI, fracked gas, shale gas, shale oil, tight gas, tight oil
1 Comment
Why studies come up with different Energy Returned on Invest (EROI) results: can it be fixed?
[ There are many issues with biofuels beyond their trivial to negative energy return on investment (EROI). In Peak Soil I point out that current industrial farming techniques are destroying topsoil about 15 times faster than pre-fossil fuel economies — … Continue reading
Posted in Biofuels, Biomass EROI, Charles A. S. Hall
Tagged biomass, EROEI, EROI, ethanol
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EROI explained and defended by Charles Hall, Pedro Prieto, and others
[ 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 Charles Hall, EROEI, EROI, Pedro Prieto
3 Comments
Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2
Preface. Below is a book review of Charles Hall’s 2017 book, “Energy Return on Investment: A Unifying Principle for Biology, Economics, and Sustainability“, that he wrote to discover why solar advocate EROI results are so much higher than what was … Continue reading
Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar EROI
Tagged capacity credit, EROEI, EROI, solar PV
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Are biofuels a sustainable and viable energy strategy?
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
Posted in Biofuels, EROEI Energy Returned on Energy Invested
Tagged biofuel, EROEI, EROI, net energy, subsidies
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California oil EROI dropped from 6.5 to 3.5 by 2005
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
Posted in EROEI Energy Returned on Energy Invested
Tagged california, EROEI, EROI, net energy, oil
1 Comment
Hall and Lambert: EROI of different fuels and the implications for society
[ 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
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
Posted in EROEI Energy Returned on Energy Invested, Threats to oil supply
Tagged deepwater, EROEI, EROFI, EROI, natural gas, oil
1 Comment
How much net energy return required to prevent collapse?
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
Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Net Energy Cliff
Tagged energy return on investement, EROEI, EROI, net energy cliff
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