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8-IE-7-Feb-08-web

8-IE-7-Feb-08-web - Goal and scope definition Inventory...

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Industrial Ecology – Winter 2008 – Session 8 – February 7 Goal and scope definition Inventory analysis Impact Impact assessment assessment Interpretation
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Industrial Ecology – Winter 2008 – Session 8 – February 7 Mandatory elements Selection of impact categories, category indicators and characterization models Classification: Assignment of LCI results to impact categories Characterization: Calculation of category indicator results Category indicator results (LCIA profile) Category indicator results (LCIA profile) Optional elements: Normalization Grouping Weighting Data quality analysis Elements of LCIA according to ISO 14044 Elements of LCIA according to ISO 14044
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Industrial Ecology – Winter 2008 – Session 8 – February 7 LCI results LCI results assigned to Impact category Category indicator results Category endpoint(s) Impact category Example: Acidification Proton release (H + aq) Cd, CO 2 , NO X , SO 2 , etc. (kg/functional unit) NO X , SO 2 , etc. (kg/functional unit) In general: - Forest - Vegetation - etc. Characterization model Source: ISO14044 Impact Assessment Impact Assessment Classification and characterization Classification and characterization
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Industrial Ecology – Winter 2008 – Session 8 – February 7 Impact category Climate change LCI results Emissions of greenhouse gases to the air (in kg) Characterization model the model developed by the IPCC defining the global warming potential of different gases Category indicator Infrared radiative forcing (W/m 2 ) Characterization factor Global warming potential for a 100-year time horizon (GWP 100 ) for each GHG emission to the air (in kg CO 2 equivalents/kg emission) Unit of indicator result kg (CO 2 eq) Substance GWP (in kg CO equivalents/kg emission) Source: (Guinée et al., 2002) Impact Assessment Impact Assessment Classification and characterization – Example 1 Classification and characterization – Example 1
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Industrial Ecology – Winter 2008 – Session 8 – February 7 Impact category Stratospheric ozone depletion LCI results Emissions of ozone depleting gases to the air (in kg) Characterization model The model developed by WMO, defining the ozone depletion potential of different gases Category indicator Stratospheric ozone breakdown Characterization factor Ozone depletion potential in the steady state (ODP ) for each emission (in kg CFC-11 equivalents/kg emission) Unit of indicator result kg (CFC-11 eq) Substance ODP (in kg CFC-11 equivalents/kg emission ) Source: (Guinée et al., 2002) Impact Assessment Impact Assessment Classification and characterization – Example 2 Classification and characterization – Example 2
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Industrial Ecology – Winter 2008 – Session 8 – February 7 Impact category Acidification LCI results Emissions of acidifying substances to the air (in kg)
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