Substainable town - fact and fiction

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Substainable town - fact and fiction

  1. 1. Sustainable town: fact & fictionChristian CAYE, Sustainable Development Officer – Citizen Act – Feb. 2012Maxime TROCMÉ, Environmental & Scientific Officer
  2. 2. VINCI, town stakeholder 2
  3. 3. Did you know...? Urban area / world area 2% Urban population / total population 50% Urban energy consumption 75% Urban CO2 emissions 80% 3
  4. 4. A changing world Watch the video here: http://www.youtube.com/watch?v=M_m9J1NTc0M 4
  5. 5. What will the towns of the future look like? New towns, or towns created “ex nihilo” Fortified towns Shrinking towns Growing towns 5
  6. 6. THE DIFFERENT TERRITORIAL SCALES THE TOWN Territorial appeal Social and cultural cohesion Optimisation of resources THE DISTRICT Pooled means Diverse activities Optimisation of roads and utilities THE “BUILDING” Affordable construction Control of impacts  Local participation THE USER Customs and behaviourCONSTRUCTED ENVIRONMENT 6
  7. 7. A town: a complex object 1/ A town is a place that concentrates and redistributes flows of: People Goods and services Energy, water, food, waste, biodiversity, … 2/ Town life only exists through its ties with the outside world: Appeal, Connectivity, Global trade 3/ A town needs “urban seeds” and “hotspots”: Stations, airports, subway stations, etc. are undeniably hotspots A stadium, a hospital, a shopping centre and a university are partial hotspots. You can have seeds without mobility… 7
  8. 8. Practical example: the Stade de France before & after 8
  9. 9. Sustainable town: new urban parameters Introduce demographic, energetic and climatic issues in a town’s production function, without harming social and heritage issues. Look at towns in a different way, LCA, know what you’re talking about (measure), associate players in the value chain as far upstream as possible. Prepare towns’ transition: towns are moving! 9
  10. 10. Towns are moving Stabilisation of greenhouse gases at 450 ppm Optimistic scenario No stabilisation of greenhouse gases Pessimistic scenario10 10
  11. 11. Eco-stadium in NICE 11
  12. 12. Towns are taking action Source: www.cdproject.net 12
  13. 13. London’s action plan13 13
  14. 14. The London example: cut CO2 emissions from 45 to 18 million tonnes14 14
  15. 15. The Stockholm example : 15
  16. 16. The most common solutions for Infrastructure/ Buildings / Usage Aspect Solutions implemented # eco-districts concerned Illustrations Rainwater collection   * Recycling   * Cogeneration   * Wind power   * Infra- Biogas production   *structure Geothermal energy   * Soil decontamination   * Biological sewerage plant   * Pneumatic waste collector and recycling system - Bo01 - Sweden Soil seepage strengthened   * Solar energy   * Thermal insulation rule   *Buildings Sustainable materials   * Building authorisations   * Roofs with solar panels Bo01 - Sweden Limiting of water and energy   * consumption Usage   * Local activities Green roofs Bedzed – United Kingdom 1. Based on the 10 following eco-districts: Bedzed, Vauban, Kronsberg, Bo01, Vesterbrö,Hammarby-Sjöstad, theatre district, Vikki, Fornebu, Augustenborg 16
  17. 17. Assessing solutions: eco-designAnalysis of a building’s life cycle: assessment of the building’s environmental impacts from its construction through to its demolition Standardised method (ISO 14 040) (XP P01-20-3)
  18. 18. LCA as a tool to assist decision-making LCA = Life Cycle Analysis The 4 phases of a life cycle: Construction Operational phase Renovation Demolition s Six indicators are used Primary energy consumption Greenhouse gas emissions Water consumption Waste production Depletion of natural resources Impacts on human health
  19. 19. Meudon la Forêt urban study Inner suburb of Paris, close to a major motorway (A86) and shopping centre (Vélizy 2) Context: in 2009, the town council decided to implement an urban study and asked 3 mixed teams to increase the density of an existing district, to imagine an eco-district with a specified programme 19
  20. 20. Meudon la Forêt urban study:increase the town’s density 20
  21. 21. District LCA: Meudon-la-Forêt project- Buildings and public spaces- Dividing up into office / housing / other zones and characterisation of public spaces
  22. 22. District LCA: Meudon-la-Forêt project Radar profile comparing the performances of regulatory improvements versus the performances of the eco-district project The environmental footprint is lower 22
  23. 23. Environmental dashboardEnvironmental impacts / m²
  24. 24. Comparison of urban forms 24
  25. 25. Comparison of urban forms 25
  26. 26. Comparison of urban forms LCA results, impacts per inhabitant Change in performance due to architecture alone! !"#$%&# (#$" (" !#" 5.6&/&-12),(&"# !#&" !() !#%" )*+,-."+./+0+/12332" !#$" 4-15" !" 6*552" 4255*,,2," 7+89",-3*+52" !*)&+#,#"- !3#-4#+#$$# $#++.)$/#+ 01/2#-+ 26
  27. 27. Intersectoral eco-design Urban spread -> transport Get the town’s stakeholders to work together New arbitrage !"#$%&# $" !#," !#+" !#*" !#)" 5.6&/&-12),(&"# !#(" !() !#" !#&" !#%" !#$" -./012"341/56789" !" :167"357./29" !*)&+#,#"- !3#-4#+#$$# $#++.)$/#+ 01/2#-+ 27
  28. 28. ECO-TECHNOLOGIES: HABITATCOLONNE (column housing) process 28
  29. 29. The USER’s influence on the environmental balance The appeal of reconciling eco-design and the monitoring of usage29 29
  30. 30. Accompanying users Rome – work by the MIT SENSEable Lab Using real-time data to make infrastructures more efficient 30
  31. 31. What about banks in all this? Supply a product at an acceptable price Substantial needs, but public finance resources are limited  find formulae where towns can finance themselves through the private sector Need for financial engineering to finance energy savings Taking new issues into account in an investment decision Green value of property complexes Put a price on the environment (anticipate the carbon tax, take externalities into account, etc.) 31
  32. 32. Involving value-chain partners Know what you’re talking about ParisTech Chair in “Eco-design of buildings and infrastructure” in partnership with VINCI   Make new guidelines and tools emerge to help eco-urbanism   Introduce a culture of innovation in the environment in our businesses through research and collaboration   Train new generations of engineers in eco-design 32
  33. 33. Involving value-chain partners La Fabrique de la Cité Imagining today the town of tomorrow Current work: Looking for Legacy: for a sustainable impact of major sports infrastructure From acceptability to adherence regarding urban projects The impact of the new energy paradigm on towns www.lafabriquedelacite.com 33
  34. 34. Any questions? 34

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