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Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
Exergy on urban scale - Exergy conference Paris
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Exergy on urban scale - Exergy conference Paris

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Invited lecture at international exergy conference, Paris June 17th 2011: Exergy to define structure and quality of materials, energy and ecosystems

Invited lecture at international exergy conference, Paris June 17th 2011: Exergy to define structure and quality of materials, energy and ecosystems

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  • Regenerative energy systems addressing energy savings and assimilation of RE 23/06/11
  • Fraction available to perform work 23/06/11
  • EN & spatial planning: different language and scale; energy potentials not fully used; knowledge gap on regional scale; energy not (yet) integrated in spatial planning 23/06/11
  • Many problems in urban area, but also solutions available 23/06/11
  • 23/06/11 Coupling of energy producing greenhouses and ultra low-exergetic households; greenhouses produce excess heat during summer, stored underground via pumps; used in winter for heat demand dwellings and greenhouses  solar energy as sole energy source for space heating
  • Exergy = use remaining qualities to increase efficiency, to reach sustainable cities/regions 23/06/11
  • Transcript

    • 1. Exergy on urban scale Wouter Leduc Chair group Landscape Architecture (Wageningen University) RiBuilT – Built Environment & Regional Development (HS Zuyd) SREX -project: S ynergy between R egional Planning and Ex ergy Exergy Conference, Paris, June 17th 2011
    • 2. Content
      • Problem
      • How to tackle
      • Examples and Research results
      • Take home message
    • 3. Million barrels day oil equivalent Source: GENI, Global Energy Network Institute
    • 4. Problem
      • High energy consumption: built environment uses 40-50 % of total energy
      • Growing urbanization – more than 50% worldwide
      • High fossil fuel use  non-sustainable + non-efficient
      • Low or no interaction between urban functions (resources)
      • Lots of waste heat and emissions
    • 5. Sustainable energy transition
      • Gradual change from fossil fuels towards regenerative energy systems:
        • Energy savings
        • Assimilation of renewable energy
      • Optimal planning approach taking into account:
        • energy quality
        • secondary resources
      • Also see e.g. KNAW, 2007 Duurzaamheid duurt het langst: Onderzoeksuit-dagingen voor een duurzame energievoorziening (KNAW, Amsterdam)
    • 6. Exergy
      • Need for more efficient use of resources, less wasting
      • Therefore:
      • Use Exergy = non-used fraction of energy or other resource
      • i.e. use remaining, un-used qualities (Q):
        • Renewables
        • Residuals: Waste = residual resource
    • 7. SREX-research
      • Stimulate synergy between exergy and spatial planning on regional level
      • Using exergy as steering principle for development of generally applicable and sustainable spatial design principles
        • Case-study in NL
    • 8. Combining several options towards a sustainable region Titel presentatie? Combined heat Power Solar power Heat flows exchange Biomass Heat grid Planned heat grid
    • 9. (Stremke, 2010) Proposed heat cascade in Emmen-Noordbarge Source: Dobbelsteen et al., 2006 Source power plant industry greenhouses offices residential areas
    • 10. Parkstad Limburg
      • Interaction between urban functions  cascades
      • Local production
      • Exploit local potentials
      • Red = Multi-functional urban clusters
      • Black = trace/plan ring road
      (Van Kann, 2011)
    • 11. Regional scale: Samsoe, Denmark
      • District heating:
        • Straw bales
        • Wood chips burning
        • Solar heating system
      • Individual heating systems
      • Renewable electricity:
        • Land-based WT
        • Offshore WT
        • PV-cells
      • Savings
    • 12.  
    • 13. Towards sustainable cities - Strategy
      • Reduce consumption
      • Re-use waste energy streams ( exergy  remaining Q)
      • Use renewable energy sources and ensure waste is re-used as food (re-cycling, cascading)
      • Developed within REAP (Rotterdam Energy Approach and Planning), by Dobbelsteen et al., 200 9
      • At different spatial scales: city, district, neighborhood, (building)
    • 14. Towards sustainable cities - Research
      • City = reservoir of un-used or un-tapped energy qualities
      • Renewable
      • Residual
    • 15. Towards sustainable cities - Research Use of decision tree (Leduc, 2010)
    • 16. Using available space for renewable energy exploitation
    • 17. Biomass power plant Solar power Wind power Zero energy city
    • 18. Towards sustainable cities
      • Harvest available urban resources  circular metabolism
      • Increase self-sufficiency & decrease dependency
      • Local potentials and characteristics
      • Multi-functionality
      • Connectivity & proximity
      • Production back to city
      • Waste = remaining quality: by re-use, cascade
    • 19. Hammarby Sjöstad, Stockholm, Sweden Source: Hammarby Sjöstad
    • 20. Zonneterp Coupling of energy producing greenhouse and low-energy houses (Mels, Kristinsson, et al., 2005) Cooling and heating Water purification Tap water purification Energy from biogas
    • 21. Eva-Lanxmeer, Culemborg, NL Curitiba, Brasil Combine living and working, minimize and more efficient transport
    • 22. Vauban, Freiburg, Germany
    • 23.
      • 0-energy city possible (case Kerkrade-West): electricity, heating, transport fuels  self-sufficient and fossil fuel free
      • Limit demand: insulation, transport measures
      • Increase efficiency: efficient and green industry, cascade residual qualities
      • Massive exploitation of renewable qualities: PV and solar boilers on roofs, wind turbines (WT), biogas, biofuel (algae); and hydrogen (via WT) for high-temperature heat
      Results
    • 24.
      • Use exergy: to increase efficiency, to limit waste of qualities, to study and support interaction
      • City can provide large part of its energy demand, if local potentials are studied and applied (decision difficult)
      • Harvesting local renewable and residual resources crucial towards 0-energy cities
      Summary
    • 25.
      • Urban planning: towards 0-energy, 0-material and 0-water cities
      • NO qualities lost
      • Aim for integrated urban system
      • Harvest local resources + combine urban functions + combine urban flows
      Summary - integration
    • 26. Exergy as guiding principle for planning Urban systems integration (Agudelo, 2011)
    • 27. Take home message
      • City = reservoir of un-used, untapped resource qualities
      • No waste, but residual resources  waste = food
      • Demand reduction!!
      • Parameters: supply and demand (qualities and quantities), and spatial and temporal implications  integration
      • In the end: EXERGY
    • 28. Thanks to my colleagues
      • Paul Ramsak – NL Agency
      • Andy van den Dobbelsteen, Leo Gommans, Siebe Broersma – Delft University of Technology
      • Gert de Roo, Ferry Van Kann – University of Groningen
      • Jusuck Koh, Sven Stremke – Wageningen University
      • Ronald Rovers – Zuyd Professional University
      • Rob van der Krogt – TNO/Deltares
    • 29.
      • Publications
      • Stremke S. ‘Designing Sustainable Energy Landscapes – PhD-thesis (Wageningen University)
      • Gommans L. ‘Exergetic system optimalization on regional scale’ – PhD-thesis* (Delft University)
      • Van Kann F. ‘Energy and Spatial Planning, based on exergy’ – PhD-thesis* (University Groningen)
      • Leduc W. ‘Planning 0-energy cities using local energy sources’, in Rovers et al., Towards 0-Impact Buildings and Built Environments
      • In progress: book about project
      • See www.exergieplanning.n l for more publications and info
    • 30. Thanks for your attention Any questions? [email_address]

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