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System Energy Assessment (SEA), Defining a Standard Measure of EROI for Energy Businesses as Whole Systems
Open AccessArticle

A Dynamic Function for Energy Return on Investment

Advanced Energy and Material Systems (AEMS) Lab, Department of Mechanical Engineering, University of Canterbury, Christchurch 8041, New Zealand
Electrical and Computer Engineering, University of Canterbury, Christchurch 8041, New Zealand
Author to whom correspondence should be addressed.
Sustainability 2011, 3(10), 1972-1985;
Received: 1 November 2010 / Revised: 1 January 2011 / Accepted: 1 February 2011 / Published: 17 October 2011
(This article belongs to the Special Issue New Studies in EROI (Energy Return on Investment))
Most estimates of energy-return-on-investment (EROI) are “static”. They determine the amount of energy produced by a particular energy technology at a particular location at a particular time. Some “dynamic” estimates are also made that track the changes in EROI of a particular resource over time. Such approaches are “bottom-up”. This paper presents a conceptual framework for a “top-down” dynamic function for the EROI of an energy resource. This function is constructed from fundamental theoretical considerations of energy technology development and resource depletion. Some empirical evidence is given as corroboration of the shape of the function components. View Full-Text
Keywords: EROI; net energy; energy-return-on-investment EROI; net energy; energy-return-on-investment
MDPI and ACS Style

Dale, M.; Krumdieck, S.; Bodger, P. A Dynamic Function for Energy Return on Investment. Sustainability 2011, 3, 1972-1985.

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