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PACT Deliverable D2.1

PACT Deliverable D2.1. Part1: Housing and energy services. Wolfgang Eichhammer ( presentation ) Martin Jakob. Task T2.1 Assessment of technologies to achieve a post-carbon society.

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PACT Deliverable D2.1

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  1. PACT Deliverable D2.1 • Part1: Housing and energy services Wolfgang Eichhammer (presentation) Martin Jakob

  2. Task T2.1 Assessment of technologies to achieve a post-carbon society • Objectives of Task T2.1 : linkage between urban schemes , structure of housing and construction, transport and energy infrastructures, and materials ; feed-up related inputs for VLEEM and POLES • Issues to be covered: Assessment of technologies for • housing, renewables, vehicles,…in post carbon urban schemes with related micro quantification of material demand for housing and transport, decentralised renewables, etc (Fraunhofer) • supplying mobility and energy services with related micro quantification of material for transport and energy production, large scale renewablescaptation, etc (Fraunhofer, Enerdata) • Dl 2.1 First report on T2.1: • Technology description of current technologies in the housing, transport and energy system

  3. Technology description of current technologies Goals • Micro-quantification of (bulky) materials (unit requirements) • Dependency between bulky material needs and energy-efficiency of buildings (standards not yet explicitly presented) • Demolition/replacement of existing buildings vs. add-on retrofits • Identify potential to save energy-intensive materials (including material substitution) by adjusting construction practice and concepts

  4. Context:residential building stock (EU27) • Floor area in Mio m2 Total: 6’910 Total: 11’130 Old Intermed. Recent New (2006-2008) Old Intermed. Recent New (2006-2008) Single-family houses Multfamily houses

  5. Overview: aggregated material needDifferent order of magnitude Construction (Envelope and structure): 850 MTonnes/a , cement Heating systems: 20 MTonnes/a , sand Appliances: 1.1 MTonnes/a

  6. Example Outer walls: Break down of specific material need [kg/m2]

  7. Example Windows (new and replacement):specific material need [kg/m2]

  8. Construction (envelope and structure):Overall material need [MTonnes/a]

  9. Construction: Breakdown of overall material need by type of building component Bricks Concrete Metals Timber Thermal Insulation Coating (plaster, mortar… Glass Others (plastic, …

  10. Retrofit of existing buildings:overall material need [MTonnes/a] • Retrofitusuallyis an add-on measure • Buildingstructureusuallyremainsunchanged • Material isneededonlyforinsulation, coating/plasterand glas • Exception: bricks in thecaseofroofs

  11. 10-15kW heating system:Specific material need [kg/unit] • Generally: mainlymetals • Oil, wood (pellets): also concrete (spaceforenergystorage) • Distribution systemstobeadded (havebeenevaluated)

  12. Appliances:Specific material need [kg/appliance] • Appliances: relevant aremainlymetalsandplastics

  13. Overview: aggregated material needPro memoria: Different order of magnitude Construction (envelope and structure): 850 MTonnes/a • Bulky materials: building envelope and structure • Concrete most relevant material • Concrete used in base plate, base wall, ceiling, flat roof (and also walls) • Bricks used in interior walls, also walls and roofs (tiles) Heating systems: 20 MTonnes/a , cement Appliances: 1 MTonnes/a , sand

  14. Conclusions Dl2.1 • Mostly weak dependency between bulky material needs and energy-efficiency of buildings (Exception: Massive construction vs. light weight construction only for energy-efficiency reason to be checked) • Bulky materials: net new or demolition/replacement of existing buildings (add-on retrofits have low relevance) • Distinct differences between different construction types (e.g. concrete, brick, wood structure) • Potential to save energy-intensive materials by adjusting construction practice and concepts: • Frame structure or piles instead of massive bricks and concrete (still needed for base plate and base wall though) • Avoid cavity walls, use exterior insulation instead

  15. From here: Back up slides

  16. Example Roofs:specific material need [kg/m2]

  17. Interior walls:specific material need [kg/m2]

  18. Construction elements: Assumptions on lifespan and replacement rates

  19. Building technology elements: Assumptions lifespan and replacement rates

  20. Building technologies:Total material use [MTonnes/a] • Bulky material needtoprovide „shelter“ forheatingsystem (spaceforheatingsystemand tank; chimney) • Also relevant: metals (andplastics/insulationmaterials)

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