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Realistic perspectives for energy renovations in the next decades

Realistic perspectives for energy renovations in the next decades. Henk Visscher – OTB, Delft University of Technology. Introduction. Henk Visscher Delft University of Technology OTB Research for the Built Environment Faculty of Architecture and the Built Environment

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Realistic perspectives for energy renovations in the next decades

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  1. Realistic perspectives for energy renovations in the next decades Henk Visscher – OTB, Delft University of Technology

  2. Introduction Henk Visscher • Delft University of Technology • OTB Research for the Built Environment • Faculty of Architecture and the Built Environment • Prof. Housing Quality and Process Innovation • Research Programme: Housing Focus: Energy efficient housing stock • Director Graduate School A+BE

  3. Structure of the presentation • Research programme Housing Quality • Recent EU projects • Energy efficient housing: theory and practice

  4. Delft 100.000 people

  5. Library • Delft University of Technology • (2011) • 17,000 students • 16% international students • 2,500 scientific staff • 14 Bac. courses • 33 Mst. courses Aula • 6,000 scientific publications • 320 PhD dissertations

  6. Faculty of Architecture

  7. Faculty of Architecture and the Built Environment • Architecture • Urbanism • Architectural Engineering and Technology • Real Estate and Housing • OTB Research for the Built Environment

  8. OTB Researchfor the Built Environment • 100 academic researchers in 3 research programmes • Housing: Housing Systems and Housing Quality • Urban and Regional Studies • Geo Governance and Technique • Funding: 40% university, 60% external funds and contracts

  9. Research on Sustainable Housing Quality OTB Researchfor the Built Environment

  10. Research Programme Housing Quality Quality of life – People spend most of their time at home: comfort, safety, health Ecological footprint – 40% of CO2 in built environment: most cost effective saving potential Economical assets – cost, value, life span, maintenance

  11. Housing Quality Research Programm

  12. Housing Quality Research Topics • II Housing Management • (by social housing associations) • Social entrepreneurship of Housing Associations • Implementation of housing stock policies • Implementation of energy efficiency policies • IV Innovative Building and Maintenance Processes • Alternative contracting • Cooperation and supply chain integration • Innovation diffusion I Assessment of Sustainable and Healthy Housing • Energy efficiency (including behaviour) • Reduction of total environmental impact (LCA calculations) • Indoor environment (ventilation systems) III Policy, regulations and quality assurance • Energy efficiency policies and regulations • Housing Quality improvement policies of municipalities • Efficiency and effectiveness of systems of building regulations and control

  13. 9b. Priority research/projects Supply chain integration Innovation Occupant behaviour and energy use Environmental impacts Housing stock improvement policies Energy reduction policies Quality assurance

  14. Housing in the Netherlands • Total 7.000.000 dwellings; • Yearly production: • new: was 70.000, now 40.000 (?) • renovation: 20.000

  15. European and Dutch targets for energy savings • EU climate and energy targets for 2020: • 20% reduction of CO2 (reference year 1990) • 20% share renewable energy in EU’s overall energy mix (NL: 16%) • 20% improvement of energy efficiency • Energy performance of buildings directive 2003/2010 • EPC‘s for new and existing buildings • New buildings 2020 NZEB • Renovation 25% of value: as new! • 2050: Energy neutral Built Environment • 70% of the housing stock of 2050 already exists

  16. Running EU Projects • Green Solar Cities: Energy renovation (Concerto) 2009-2013 • SHELTER: Cooperation and coordination for energy renovation (IEE) 2010-2013 • BEEM-UP: Energy renovation – participation and behaviour of occupants (FP7) 2011-2014

  17. Renovation Poptahof

  18. Running EU Projects • Ecoheat4cities: Labelling systems for district heating systems (IEE) 2010-2013 • NEU-Jobs: Our part: development in the European housing renovation market (FP7) 2011-2014 • SusLabNWE: Realisation and pilots with sustainable living labs – Our part: input for measuring systems, organisation and analysis pilots (Interreg) 2012-2014

  19. COHERENO – Collaboration for NZenergy renovations of owner occupied single family houses – IEE 2013 – 2016 EPISCOPE (follow up of TABULA) – IEE 2013-2016 PLEEC – Planning for smart cities - FP7 2013-2017 NEW EU-projects

  20. NL: Current policies • 2020 RES 16% • 2050 Fossil free energy system. • House prices go down • Hard to get mortgages • House building reduced • Also renovation reduced • Housing Associations have less money…

  21. Progress in energy renovation in NL? Housing Associations 2,4 mil dwellings Covenant: in 2020 average Energy label: B Survey: • 49% of the HA mention an average label in 2020 • only 52% of them mention Label B: • in total only 25% confirm the covenant

  22. Research 1Energy performance of New Dwellings in NL • NL: Energy Performance Regs. Since 1995 • Level: non dimensional digit: (1995) 1.4 – 1.2 – 1.0 – 0.8 – 0.6 (2012) • Research: Statistical relation between dwellings built under various levels of EPC and final energy use • 3 data bases

  23. Results – Energy use per m2 • Actual Energy reduction stagnates • Rebound effect + under performance of enveloppe and installations

  24. Research 2Energy use in the existing stock • Energy label data base 2010 • Actual energy use 3 years • 200.000 cases

  25. Results Theory Actual

  26. Results G label: 50% less use than expected

  27. Results A and B label: 10-20% more use than expected

  28. Results Very little actual savings

  29. Total primary energy use

  30. Total CO2 emissions • Total CO2 emissions can hardly be reduced by reducing the heating demand • Covering the domestic electricity use with PV is very effective in NL!

  31. Conclusions • Large scale renovations on nZEB levels will be very hard to achieve: requires hughe investments • When renovating poor performing dwellings to higher levels, a large share of potential savings are used to increase comfort=> the average temperature in the dwelling increases • Renovation programmes should be set up with the aim to increase the total quality and increase the expected life span and value of the dwellings • Quality assurance essential to achieve potential performances of nZEB • Use of RES (PV) large contribution to reduce CO2

  32. New Research Opportunities

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