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30 Aug 08
Tarmo ToikkanenEnergy return-on Energy Input - how efficient are we in producing energy?
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Net energy is more important from a relative basis than absolute. A 3:1 EROI doesn't tell us much unless we know how that compares to what an organism/society has been built on/used to. A 2:1 EROI would have made stone age villagers incredibly rich. A 5:1 EROI may not be enough to power our society.
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Energy reserves are not as important as energy flow rates.
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Adding high EROI wind capacity while net energy of oil dwindles does not solve the problem, unless the energy mix changes from liquid fuels to electricity
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Rather than pursuing the highest and most promising energy technologies, it might be prudent to pursue ones that are certain, and meet the net energy decline half-way by reducing energy footprints.
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Since evolution has favored organisms that have the highest energy output energy input ratios, it will be a cognitive challenge for us (as organisms) to willingly reduce the numerator.
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Our collective task will be to improve our net (total cost) energy from renewables while changing the infrastructure of society to best match what our long term sustainable energy gain can be.
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25 Aug 08
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30 Oct 07
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17 Mar 07
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