Hotspots analysis in LCA supported by novel visualisations...Presentation overview 1. Introduction:...
Transcript of Hotspots analysis in LCA supported by novel visualisations...Presentation overview 1. Introduction:...
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Hotspots analysis in LCAsupported by novel visualisationsAndreas Ciroth, Franziska Eisfeldt, Franziska Möller, Cirstina Rodríguez
GreenDelta GmbH
September 2017, LCM2017
software / data / know-how
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Presentation overview
1. Introduction: Interpretation and visualization in LCA,
and hotspot analysis
2. Examples from one software and one case study
3. Discussion and outlook
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C. Rodríguez et al., Regionalised LCIA implementation in LCA software for decision-making analysis in LCM, Bordeaux, LCM2015
Interpretation, visualisation, hot spot analysis
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Interpretation: Basically, everything in LCA is about interpretation..
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..and while facts and numbers are of course important outcomes and one input for interpretation, visualization is important
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Hot spots, literally: Regions or areas of high concern
Children‘s Environmental Health Initiative: Hot Spot Analysis, https://www.cdc.gov/dhdsp/maps/GISX/training/module3/files/3_hotspot_analysis_module.PDF
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Hot spots, more broadly: Abstract areas or points of high concern
In statistics, hot-spot identification is a well-known problem with several possible techniques to be applied (typically, cluster analyses and similar),
In LCA and Sustainability Analyses, more simple approaches are used, and “hot spots” are typically points that contribute most
“The life cycle phase or phases with highest impact receive the highest value, whereas a stage with a low relevance is assigned a low value.The hot spots are determined by multiplying the value of the category and the value of the phase”
H. Rohn, M. Lukas, K. Bienge, J. Ansorge, C. Liedtke: The Hot Spot Analysis: Utilization as Customized Management Tool towards Sustainable Value Chains of Companies in the Food Sector, Agris, Vol IV Number 4, 2014
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Hot spots, UNEP-SETAC, Hotspots Analysis flagship project 2017
UN Environment 2017: Hotspots Analysis: An overarching methodological framework and guidance for product and sector level application, p. 10
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Hot spots, UNEP-SETAC, Hotspots Analysis flagship project 2017
Focus on the procedure rather than on hot spot detection (so far)
UN Environment 2017: Hotspots Analysis: An overarching methodological framework and guidance for product and sector level application, p. 10
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C. Rodríguez et al., Regionalised LCIA implementation in LCA software for decision-making analysis in LCM, Bordeaux, LCM2015
Case study: Cotton T-shirt
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Cultivation cotton/ Cotton fibre
production (US)
Ship transport US -> BG
Textile production & T-Shirt
production (BG)
Ship & lorry transport BG -> GER
Sale of T-Shirt (GER)
Life cycle of a conventional cotton T-shirt
Use of T-Shirt (GER)
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Production chain conventional cotton T-shirt
Cotton fibre productionT-shirt
production
Sale & Use of T-shirt
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Life cycle for T-shirt, in softwaremodel graph, in openLCA
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Comparing impactsbar chart, all ReCiPe midp. categories
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1st idea: Contribution treefor detecting hot spots
• Turn the looped network of processes and flows into a tree
• Cut-off loops and turn them into branches
• Processes may appear several times
• Calculate the impact contribution for the elements in the tree
• Order by highest contribution
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1st idea: Contribution treefor detecting hot spots
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1st idea: Contribution treefor detecting hot spots
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1st idea: Contribution treefor detecting hot spots
Social results
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Contribution treeimpacts in a tree view
Environmental results
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Contribution tree, continued
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2nd idea: A life cycle model combines(typically) processes of various quality
• How stable is the information about the most contributing elements, the hot spots?
• Hot spot and weak quality -> rather improve the quality?
• Hot spot and good quality -> take action?
• Would it be possible to show the data quality together with LCA results?
• Better for the interpretation (and in the end decision support)
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LCIA results of T-shirt over its life cycleLCI incl. data quality
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Data quality indicators: e.g., ecoinvent
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LCIA results of T-shirt over its life cyclemidpoint results incl. data quality
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LCIA results of T-shirt over its life cyclemidpoint results by process and flow
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LCIA results of T-shirt over its life cycleTop 5 process contrib. incl. data quality
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LCIA results of T-shirt over its life cycleTop 5 process contrib. incl. data quality
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Idea: Localisation of „impact causes“map view
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Idea: Displaying impacts in a network in a more compressed waysun burst
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Displaying impactssun burst
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C. Rodríguez et al., Regionalised LCIA implementation in LCA software for decision-making analysis in LCM, Bordeaux, LCM2015
Summary, Outlook and discussion
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Summary
• I have shown a way to visualize contributions in LCA case studies and product systems using an ordered “contribution tree” view
• This view is useful for detecting hot spots
• Adding the data quality of processes in the product system to the results is useful for interpretation since it helps to understand how reliable the information is
• Maps, and sun burst charts, are further useful for understanding the product results
• All these elements are available in openLCA 1.6
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Outlook & discussion: However..
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Outlook & discussion: However..
• There are several DQ systems proposed (ecoinvent, ecoinvent modified, PEF, ..)
• Existing DQ systems change
• This has an effect on the DQ results obviously
• But in the end is probably comparable to LCIA methods
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Outlook & discussion
Overall, we are probably just at a starting point in LCA visualisation & hot spot analysis:
• Systematic hot spot analysis?
• Display of large results so that users (of various background, also non-LCA) understand, tiered approaches
• Information for the modeler (unused flows, ..) and for the “end user”
• Smart combination of various dimensions
• Learning from other disciplines (biogenetics, e.g.)
We invite tool developers and users to discuss and exchange, and potentially collaborate, on LCA visualisation.
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C. Rodríguez et al., Regionalised LCIA implementation in LCA software for decision-making analysis in LCM, Bordeaux, LCM2015
Merci!Contact: Dr. Andreas Ciroth
GreenDelta GmbHMüllerstrasse 135, 13349 Berlin, [email protected]