Zahra Hosseini Raymond Cole. School of Architecture + Landscape Architecture University of British Columbia

Transcription

1 Zahra Hosseini Raymond Cole School of Architecture + Landscape Architecture University of British Columbia

2 Current Situation

3 Material Flow?

4 C&D Waste Rates Worldwide Raw Material Consumption Metro Vancouver Waste!"#$ %"#$ &'()*+,-.'($/(0,)*+1$ 2*34+$ (Roodman and Lenssen, 1995)

5 Current Green Building Strategies Building reuse Material reuse Recycled content Recyclable Local Certified wood Rapidly renewable Low-emitting Durable materials Reuse Deconstruction Recycle Embodied carbon footprint Local Responsible industry Eliminate red list Assessment criteria: Fossil fuel depletion Water use Global warming potential Ozon depletion Acidification Toxic releases

6 Positive Design

7 Less bad is not good enough! Previous damages should be healed

8 Net-Positive Design Giving more than requiring Energy Flows Water Flows Material Flows

9 Can we apply the notion of net-positive to construction material flows? Energy Flows Water Flows Material Flows

10 Net-Positive Material Use - Achievability? - Definition criteria? Photo by Jeff Kubina - Definition boundaries? anagennao.org

11 Net-Zero/Positive Energy Buildings

12 Current Definitions Net-Zero Energy Buildings Energy demand = Renewable-energy supply Net-Positive Energy Buildings Energy demand < Renewable-energy supply Yearly Renewable Energy Supply Yearly Energy Demand

13 Net-Zero/Positive Energy Buildings Definitions Criteria Metrics Boundaries Baseline Timeframe Site Energy Source Energy Supply Building footprint Reduced energy demand Monthly/Seasonal Yearly Cost Emissions Building site Off-site resources Generated energy = Consumed energy Building Operating Time Building Life Cycle Exergy Off-site supply Excess Off-grid On-grid

14 Net-Zero/Positive Energy Net-Zero/Positive Energy Buildings Buildings Metrics Boundaries Baseline Timeframe Site Energy Source Energy Supply Building footprint Reduced energy demand Monthly/Seasonal Yearly Cost Emissions Building site Off-site resources Generated energy = Consumed energy Building Operating Time Building Life Cycle Exergy Off-site supply Excess Off-grid On-grid

15 Net-Zero/Positive Energy Net-Zero/Positive Energy Buildings Buildings Metrics Boundaries Baseline Timeframe Site Energy Source Energy Supply Building footprint Reduced energy demand Monthly/Seasonal Yearly Cost Emissions Building site Off-site resources Generated energy = Consumed energy Building Operating Time Building Life Cycle Exergy Off-site supply Excess Off-grid On-grid

16 Net-Zero/Positive Energy Net-Zero/Positive Energy Buildings Buildings Metrics Boundaries Baseline Timeframe Site Energy Source Energy Supply Building footprint Reduced energy demand Monthly/Seasonal Yearly Cost Emissions Building site Off-site resources Generated energy = Consumed energy Building Operating Time Building Life Cycle Exergy Off-site supply Excess Off-grid On-grid

17 Net-Zero/Positive Energy Net-Zero/Positive Energy Buildings Buildings Metrics Boundaries Baseline Timeframe Site Energy Source Energy Supply Building footprint Reduced energy demand Monthly/Seasonal Yearly Cost Emissions Building site Off-site resources Generated energy = Consumed energy Building Operating Time Building Life Cycle Exergy Off-site supply Excess Off-grid On-grid

18 54*67')8.94$:;*4+8;<$=)4$

19 Convectional Materials Closing materials loop Bio-Materials Producing more than use

20 Possible Definitions for Conventional Materials Quantitative Number of recovery times Qualitative Increasing of value Recovery Times 1 Recovered once Net-Positive Net-Zero Material Value Net-Positive New mat. Value = Old mat. Value Net-Zero Time Time

21 Possible Definitions for Conventional Materials Quantitative Number of recovery times Qualitative Increasing of value Recovery Times 1 Recovered once Net-Positive Net-Zero Material Value Net-Positive New mat. Value = Old mat. Value Net-Zero Time Time

22 Quantitative Number of recovery times Qualitative Increasing of value Challenges Future uncertainties Recovery quality Value metrics Value beneficiary Recovery types

23 Net-Positive Material Use Metrics Qualitative Value metrics Value Cultural - Economic Environmental Social Physical Psychological Cost LCA Employment Aesthetic Strength

24 Net-Positive Material Use Boundaries Qualitative Value beneficiaries Value Cultural - Economic Environmental Social Physical Psychological Material / Component Economic Environmental Social Physical Building Economic Environmental Social District

25 Net-Positive Material Use Boundaries Qualitative Value beneficiaries Value Cultural - Economic Environmental Social Physical Psychological Material Function Material Visibility Stakeholders View Economic Environmental Social Physical Building Function Stakeholders View Economic Environmental Social Stakeholders View

26 Net-Positive Material Use Baseline Qualitative New Material Value = Reclaimed Material Value Quantitative The material is reused once in the same function Qualitative New Building Value = Old Building Value Quantitative Building made of reused materials that are reused once?

27 Net-Positive Material Use Timeframe n Material s Lifetime Component s Lifetime Building s Lifetime

28 Net-Positive Material Use Questions to be answered: How detailed or broad the definition of value should be? How different criteria can be related to assess the overall value? What is the most appropriate physical boundary for the definition? What are the strategies for dealing with uncertainties about future? blog.iesve.com

29 Zahra Hosseini Raymond Cole School of Architecture + Landscape Architecture University of British Columbia