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Zero Carbon Isn’t Really Zero: Why Embodied Carbon in Materials Can’t Be Ignored

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A Design Intelligence webinar provided by Arup consultants focusing on environmentally sustainable building design. The webinar is based on a web article authored by Frances Yang and Engin Ayaz.
http://www.di.net/articles/archive/zero_carbon/

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Zero Carbon Isn’t Really Zero: Why Embodied Carbon in Materials Can’t Be Ignored

  1. 1. Zero Carbon Isn’t Really Zero[ Why Embodied Carbon in Materials Can’t Be Ignored ]<br />Total Embodied vs. Operational Carbon for 60 year building lifecycle<br />2: Efficiency<br />3: Clean Power<br />1: Baseline<br />4a: Refurb<br />4b: Rebuild<br />Webinar: Tuesday, Nov 10 2009, 1pm ET / 10am PT<br />
  2. 2. Presenters<br />
  3. 3. AttendeePollfor the Design Intelligence/ Arup conference about “Embodied Carbon in Buildings.”Based on actual attendance dataLocations and professions are approximatedData: Stephanie WhittakerGraphics: Engin Ayaz<br />London<br />Hawaii<br />LOCATIONS<br />Sydney, Aus<br />PROFESSIONS<br />SUMMARY<br />80 people registered<br />57 people attended<br />17Arup people registered<br />10 Arup people attended<br />architect / designer<br />researcher<br />contractor<br />unknown<br />facilities manager<br />engineer<br />
  4. 4. Background of Arup<br />10,000 Staff in 92 Offices<br />global | integrated | employee-owned | multidisciplinary<br />
  5. 5. Principal Fields of Activity in the US<br />Structural Engineering<br />Mechanical Engineering<br />Electrical Engineering<br />Plumbing Engineering<br />Fire Engineering + Life Safety<br />Sustainability<br />Civil Engineering<br />Façade Engineering<br />Energy<br />Infrastructure Planning<br />Transportation Planning<br />Traffic Engineering<br />Communications / IT Consulting<br />Acoustics / Vibration Consulting<br />Audiovisual Consulting<br />Master Planning<br />Security / Risk Assessment<br />Building Energy Assessment<br />Computational Fluid Dynamics<br />Environmental Consulting<br />
  6. 6. Agenda<br />
  7. 7. ARUP SUSTAINABLE BUILDINGS <br />DESIGN FRAMEWORK<br />On every project we aim to help our clients imagine how their buildings might be:<br />© Arup<br />© Arup<br />© Arup<br />© Arup<br />© Arup<br />© Arup<br />
  8. 8. A closer look at life-cycle thinking<br />Renovation, Demolition, Recycling & Reuse<br />Operations & Maintenance<br />Extraction<br />Design & Construction<br />Manufacturing & Transport<br />OPERATIONAL<br /> EMBODIED<br />
  9. 9. Definitions<br />f (Material Energy, Lifespan, Refurbishment)<br />Building Embodied Energy<br />=<br />f (Material Energy, Lifespan, Refurbishment + Energy Source + Chemical Processes + Transport Fuel Type)<br />=<br />Building Embodied CO2<br />http://www.astwood-herefordshire.co.uk/gallery/gallery_images/timber%20trees%20.jpg<br />http://concreteloop.com/wp-content/uploads/2008/10/gasoline1.jpg<br />http://en.wikipedia.org/wiki/File:06_Contes_cimenterie.jpg<br />
  10. 10. Global Statistics<br />
  11. 11. Zero Energy / Carbon Definition<br />Boundary for <br />Environmental Footprinting<br />Water<br /> increasing<br />comprehensiveness<br />Waste<br />increasing complexity<br />Transport (People & Logistics)<br />Embodied in materials<br />throughout lifecycle<br />Operational Electricity & Gas Consumption<br />Impacts<br />© Arup<br />Energy<br />CO2<br />CO2e<br />(All GHGs)<br />Other <br />Environmental<br />
  12. 12. Zero Energy / Carbon Definition<br />Boundary for <br />Environmental Footprinting<br />Water<br />Waste<br />Transport (People & Logistics)<br />Our <br />Study<br />Embodied in materials<br />throughout lifecycle<br />Operational Electricity & Gas Consumption<br />Impacts<br />© Arup<br />Energy<br />CO2<br />CO2e<br />(All GHGs)<br />Other <br />Environmental<br />
  13. 13. Zero Energy / Carbon Definition<br />Boundary for <br />Environmental Footprinting<br />Water<br />Waste<br />Transport (People & Logistics)<br />Emb<br />Embodied in materials<br />throughout lifecycle<br />Op<br />Operational Electricity & Gas Consumption<br />Impacts<br />© Arup<br />Energy<br />CO2<br />CO2e<br />(All GHGs)<br />Other <br />Environmental<br />
  14. 14. Past Studies<br />Embodied energy is 2-22% of 50 yr life-cycle energy demand<br />Embodied energy is 4-9% of 50 yr life-cycle energy<br />Embodied energy is 9-12% of 60 yr life-cycle energy demand <br />Embodied carbon is 13-18% of 66 yr life-cycle carbon emissions<br />Embodied carbon is 37-43% of 60 yr life-cycle carbon emissions<br />Up to 80% of the life-cycle carbon emissions is embodied carbon<br />
  15. 15. Case Study<br />Color Legend: Embodied vs. Operational<br />Line chart:<br />To compare whole-life carbon emissions trends across 60 year lifecycle<br />for baseline<br />© Arup<br />Doughnut chart: <br />To compare the aggregated carbon emissions at the end of 60 years<br />2: Efficiency<br />3: Clean Power<br />1: Baseline<br />4a: Refurb<br />4b: Rebuild<br />
  16. 16. The tool behind it<br />“EVOCE: Embodied vs Operational Carbon Emissions” Tool, developed by Arup<br />
  17. 17. Case 1: Baseline <br />for baseline<br /> Typical mid-rise office bldg, 60 year lifespan, ASHRAE 2004 baseline<br />
  18. 18. Case 2: Energy Efficiency<br />for baseline<br />Source: CPUC Energy Efficiency Plan<br /> Max LEED EA points – 50% energy reduction <br />Source: ASHRAE<br />
  19. 19. Case 3: Clean Power<br />for baseline<br /> 30% more renewables (on-site, grid, offsets) <br />Source: Pew<br />
  20. 20. Case 4a: Refurbish<br />for baseline<br /> Replacement of mechanical systems, façades, and finishes at 30th year <br />
  21. 21. Case 4b: Rebuild<br />for baseline<br /> Demolition and rebuild at 30th year <br />
  22. 22. Our Conclusion<br />2: Efficiency<br />3: Clean Power<br />1: Baseline<br />4a: Refurb<br />4b: Rebuild<br />Embodied carbon is 11-50% of 60 yr life-cycle emissions<br />
  23. 23. Wider Context<br />High-performance<br />design<br />Design for<br />Deconstruction<br />Future flexibility<br />© Arup<br />Infrastructure<br />Site<br />
  24. 24. Proposed Overall Approach<br />Load reduction, efficiency, renewables<br />Long-lasting, weatherproof, disaster-resilient systems; Adaptable, flexible space<br />Make use of existing building; Reduce total built area<br />Reclaimed and recycled content; Rapidly renewable and local/regional materials<br />Built-in source separation, chutes; Favor take-back schemes<br />Outreach to occupants; Purchasing policies & waste contracts<br />© Arup<br />
  25. 25. Thanks…<br />Questions?<br />DI Subscription<br />

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