Renewable Transition 2: EROEI Uncertainty (2) - #energy #renewables

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	Renewable Transition 2: EROEI Uncertainty (2) - #energy #renewables

JICWyllie

8-18-2009 8:37 AM

36 views

tags:

1-construction, 1-feasability, 1-transition, 2-failure, 3-forecast, 4-intl

JICWyllie says:

The only way out is for people to use radically less energy which will happen irregardless. The only question is whether the infrastructure of civilisation, such as global transport and electricity grids, will be needed.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/43d11e4b-899f-4f51-b536-9e354f79487d/CF0CA3C8-0388-4023-A95C-5D84E338CDA8/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.theoildrum.com/node/5588" href="http://www.theoildrum.com/node/5588" style="font-size: 11px;">www.theoildrum.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.theoildrum.com/node/5588"><P><A rel="nofollow" href="http://www.eoearth.org/article/Net_energy_analysis#Energy_Input-Output_Analysis">Input-output</A> studies (which tend to be "more comprehensive," including more attenuated inputs, but certainly still only the “front” of the long-tail) averaged only 50% the EROEI figure of the <A rel="nofollow" href="http://www.eoearth.org/article/Net_energy_analysis#Process_Analysis">process-analysis</A> EROEI figures for similar technologies under roughly similar conditions.  If inclusion of a small portion of this long-tail can reduce EROEI by as much as 50%, it is at least possible--I would argue likely--that inclusion of the full "long tail" will make “systemic” EROEI as much as an order of magnitude lower than “conventional” EROEI measures.  </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.theoildrum.com/node/5588">The more pertinent question here may be "what artificial boundary to draw when considering questions that affect human society as a whole?"  I argue that, ultimately, we must draw the boundary at our planet, a system that, at least on human-relevant time scales, tends to operate in relative stasis given the continuous input of solar energy.  </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.theoildrum.com/node/5588">As a result, EROEI of civilization must balance out to roughly 1:1 </blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/CF0CA3C8-0388-4023-A95C-5D84E338CDA8/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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