Economic assessment of ligh0ng systems annual energy 126 kw/h 14 kw/h Years Service System running cost (£) Halogen System running cost (£) LED 3 96 60 10 250 72 25 481 91 (Swedish Energy Agency -‐ LCC tool)
green economy demands complexity! • 7 materials • Manufacturing energy 42MJ (per 20M lumen-‐hours) • Use energy 60W • 30+ materials (17 materials in LED chip) • Manufacturing energy 343 MJ (per 20M lumen-‐hours) • Use energy 12.5W (DOE 2012, DEFRA 2009)
purchasing a supply chain Image : www.sourcemap.com
how will you design to reduce & recirculate resources? will collec3on rates deliver viable streams? what processing technologies are emerging? what guides or tools inform/assist decision making? is a shid to service based business models realis3c? complexity = ques3ons
take/make/use/break/disposethe linear (sweep it under the rug) system is broken
why have you made it un-‐repairable? upgradable? Glued in baGeries Pentalobe screws Soldered in RAM Image source: www.iﬁxit.com is obsolescence part of your business model?
problem: the things we procure arent green enough; the greenest things buy into systems! poten3al: need for partnerships across value chain – (waste management to design) GPP needs to ask ques3ons which reverberate through value chain
Philip Harﬁeld (Senior Project Oﬃcer) Ecodesign Centre firstname.lastname@example.org
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