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Sustainability 2011, 3(12), 2339-2357; doi:10.3390/su3122339
Article

Deriving an Improved Dynamic EROI to Provide Better Information for Energy Planners

1,*  and 2
Received: 10 January 2011 / Revised: 4 August 2011 / Accepted: 1 September 2011 / Published: 8 December 2011
(This article belongs to the Special Issue New Studies in EROI (Energy Return on Investment))
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Abstract

The two most frequently quantified metrics of net energy analysis–the energy return on (energy) investment and the energy payback period–do not capture the growth rate potential of an energy supply infrastructure. This is because the analysis underlying these metrics is essentially static–all energy inputs and outputs are treated the same, regardless of where they occur in the life cycle of the infrastructure. We develop a dynamic energy analysis framework to model the growth potential of alternative electricity supply infrastructures. An additional figure of merit, the infrastructure doubling time, is introduced. This metric highlights the critical importance of the time phasing of the initial energy investment for emplacing a given infrastructure, as opposed to the ongoing O&M energy expenditures, for the infrastructure’s growth potential. The doubling time metric also captures the influence of capacity factor, licensing and construction time lags.
Keywords: doubling time; dynamic EROI; sustainability; net energy doubling time; dynamic EROI; sustainability; net energy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kessides, I.N.; Wade, D.C. Deriving an Improved Dynamic EROI to Provide Better Information for Energy Planners. Sustainability 2011, 3, 2339-2357.

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