Category Archives: Charles A. S. Hall

Charles Hall is the originator of the concept of EROI. As a tenured professor not funded by any special interests, he is one of the most respected, cited, and unbiased scientists writing on EROI.

“The concept of EROI was introduced by US fisheries ecologist Charles Hall, who noted that the energy a predator gained from eating prey had to exceed the energy expended in catching it. In 1981, Hall applied this net energy analysis to our own power generation activities, charting the decline of the EROI of US oil as ever more drilling was required to yield a given quantity, and suggesting the possibility that oil may one day take more energy to extract than it yields. Hall and others have since estimated the EROI for various power sources, a difficult analysis that requires identification of all energy inputs to power production.

EROI is a fundamental thermodynamic metric on power generation. Net energy analysis affords high-level insights that may not be evident from looking at factors such as energy costs, technological development, efficiency and fuel reserves, and sets real bounds on future energy pathways. It is unfortunately largely absent from energy and climate policy development.”
I found this description of Hall at an excellent article about energy storage and EROI by John Morgan that I highly recommend reading: http://climatechangefork.blog.brooklyn.edu/2014/11/04/guest-blog-john-morgan-the-catch-22-of-energy-storage-and-eroi/

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

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

[ In Charles Hall’s latest 2017 book, “Energy Return on Investment: A Unifying Principle for Biology, Economics, and Sustainability“, he says that he has embarked on a project to discover why solar advocate EROI results are so much higher than … 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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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. This book is the best EROI study that has ever been done. It is based … 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

Charles A. S. Hall Conventional oil peak was 2005

The global production of conventional oil began to decline in 2005, and has followed a path over the last 11 years very close to our scenarios assuming low estimates of extractable ultimate resource (1.9 Gbbl) John L. Hallock Jr., Wei … Continue reading

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Charles A. S. Hall “EROI of different fuels and the implications for society”

Charles A.S. Hall, Jessica G. Lambert, Stephen B. Balogh. 2014. EROI of different fuels and the implications for society. Energy Policy 64: 141-152. Highlights: For nations examined, the EROI for oil and gas has declined during recent decades. Lower EROI … Continue reading

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John W Day Jr, Charles Hall, et al: Ecology in Times of Scarcity

Day, J. W. Jr., Hall, C.A., Yanez-Arancibia , A., Pimentel, D., Marti, C. I., and Mitsch, W. J. 2009. Ecology in Times of Scarcity. BioScience. 59:4, 321-331. Abstract In an energy-scarce future, ecosystem services will become more important in supporting … Continue reading

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Energy price increases and the 2008 financial crash: a practice run for what’s to come?

Hall, C.A.S., Groat, A. 2010. Losing Faith in Economics. Energy price increases and the 2008 financial crash: a practice run for what’s to come? The Corporate Examiner. 37: No. 4-5: 19-26. The summer of 2008 saw the third year in … Continue reading

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Charles Hall “Peak oil, declining EROI and the probability of degrowth”

Charles A. S. Hall . March 2010. Peak oil, declining EROI and the probability of degrowth. Second Conference on Economic Degrowth for Ecological Sustainability and Social Equity March 26-29th 2010, Barcelona Peak oil is not some fuzzy academic concern but … Continue reading

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