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Energy Systems and Technologies for the Coming Century ...

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AIRFINE®(Reference)MEROS®Ca(OH)2MEROS® NaHCO355% SO2 separationMEROS® NaHCO390% SO2 separation-1,0E-10 -8,0E-11 -6,0E-11 -4,0E-11 -2,0E-11 0,0E+00 2,0E-11Normalized impact results acc. to CML 2001, Dec. 07 (EU25+3)ADP EP POCP GWP APFigure 7: Profile of normalized indicator results <strong>for</strong> selected impact categories accordingto CML 2001, Dec. 2007 (spatial normalization to European area (EU25+3))For presentation <strong>and</strong> illustrative purposes <strong>the</strong> normalized indicator results are aggregatedacross <strong>the</strong> five selected impact categories by equally weighting in order to derive a singleenvironmental score. In figure 8 <strong>the</strong> result <strong>for</strong> such an aggregation is used to place <strong>the</strong>different product systems on <strong>the</strong> y-axis. Additionally to <strong>the</strong> environmental benefitin<strong>for</strong>mation customer benefits of <strong>the</strong> product system is reflected by <strong>the</strong> total cost ofownership on <strong>the</strong> x-axis.Environmental Benefit2,01,00,0NaHCO 3 with90% SO 2 separationMEROS ®(Ca(OH) 2AIRFINE ® MEROS ®MEROS ®NaHCO 3 with55% SO 2 separation-1,0-1,0 0,0 1,0Customer BenefitFigure 8: Eco-Care-Matrix representation of aggregated single scores based on fivedifferent selected environmental impact categories(aggregated with similar weighting of normalized indicator results)The Eco-Care-Matrix in figure 8 delivers decision supporting in<strong>for</strong>mation about <strong>the</strong>different dedusting product systems at a glance but it may hide <strong>the</strong> full extent <strong>and</strong>ramifications of <strong>the</strong> underlying life cycle impact assessment results because of <strong>the</strong>aggregation of several impact categories. Trade-off effects between <strong>the</strong> impact categoryindicator results as illustrated in figure 6 are not visible anymore in this aggregated view.This could cause incorrect decision-making <strong>and</strong> also “green washing” criticism bystakeholders. In order to provide <strong>the</strong> appropriate extent of in<strong>for</strong>mation it is recommendedaccording to ISO st<strong>and</strong>ard 14044:2006 to make data <strong>and</strong> indicator results or normalizedindicator results reached prior to weighting available.Risø International <strong>Energy</strong> Conference 2011 Proceedings Page 194

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