FRASE NOMINAL EJERCITACION
Frase Nominal (FN) EJERCITACION Energy Return and Rate of Return Posted by Sharon Astyk on December 23, 2009 I was just laboring over a post designed to explain the relationship between energy returned over energy invested and the importance of the *rate* of that return for our expectations about future resources, when I found out that Dr. Tom Konrad had already done this – yay! I think this is a useful and clear way of articulating the problems of future renewables. While I don’t agree with all Konrad’s conclusions as they are expressed (more on that in a second), I think he makes the relationship between EROEI and Rate of Return very clear and does so in a remarkably useful way. He writes: The general trend is clear: the energy of the future will have lower EROI than the energy of the past. Low carbon fuels such as natural gas, nuclear, photovoltaics, wind, and biofuels have low EROI compared to high-carbon fuels such as coal and (formerly) ...