Sustainable buildings on their life cycle: challenges and opportunities. Quentin de Hults, BASF G-STIC Conference, 2017, Oct 23

Transcription

1 Sustainable buildings on their life cycle: challenges and opportunities Quentin de Hults, BASF G-STIC Conference, 2017, Oct 23

2 The building stock and construction sector is facing major challenges FL IR Sy s te m s 9.3 C Consumes up to 40 % of the worlds energy Contributes to 30 % of the global greenhouse gas emissions -2-4 Responsible for around 4% of particulate emissions Displaces the most productive land 1/3 or more of all waste results from construction and destruction activities Concrete: most widely used material after water (1m³/person/year) Sources : UNEP, sustainablebuild, WBCSD 2

3 Green buildings can contribute towards meeting the Sustainable Development Goals More : 3

4 Assessing resource efficiency & impacts require life cycle thinking Construction material Raw material Construction Recycling Waste Use phase Demolition Compilation of all inputs, outputs and environmental impacts of a product /system throughout its life cycle 4

5 First priority : energy consumption in use FL IR Sy s te m s 9.3 C Consumes up to 40 % of the worlds energy Contributes to 30 % of the global greenhouse gas emissions -2-4 Meeting the objectives of the Paris Agreement requires a highly energy efficient and decarbonized building stock nearly zero energy building level Renovation challenge : do more and better Huge opportunity for jobs, growth, comfort, health, air quality, 5

6 If new buildings are nearly zero energy, the embodied impacts gains relevance Analysis over 50-years building life cycle Primary energy 100% 75% 50% 25% 0% Use phase Embodied impacts 8% 15% 42% Year Relevance of embodied impacts on the entire life cycle will increase considerably... this makes the choice of materials and technics over the life time much more important this makes Life Cycle Assessment (LCA) more and more important Source: Dr. Peter Mösle, Drees & Sommer Advanced Building Technologies GmbH 6

7 Environmental Product Declaration (EPD) : the material data input for building assessment EN Assessment of Environmental Performance Building life cycle assessment EN Core PCR for Environmental Product Declarations Materials/products/ elements data inputs via EPDs 7

8 Environmental Product Declaration example Source : 8

9 EPDs provide information on materials, one optimization angle, not the only one Building environmental performance optimization Design optimization - Energy efficiency - Water efficiency - Material use - Shape / design - EPD s Product/material optimization - Material selection - Product/supplier selection 9

10 EPDs can demonstrate the benefits of innovation Styropor, expandable polystyrene patented by BASF in 1951 Environmental Product Declarations show the reduced environmental impact in the production for the same insulation performance 1m² with R-value 1, density 15 kg/m³ ADP f -16% GWP -19% ODP -17% AP -23% EP -33% POCP -41% Cradle to gate (A1-A3) Neopor, expandable polystyrene patented by BASF in

11 Test case : life cycle assessment of a complete building source: Example BASF customers project 100% 90% 80% 70% 60% Others Paint Internal walls Façades Windows Roof insulation Concrete 50% 40% 30% 20% concrete contributes to 40-70% of embodied environmental impacts 10% 0% Mass GWP ODP AP Example indicators* *GWP = Global Warming Potential ODP = Ozone Depletion Potential AP = Acidification Potential 11

12 Innovative chemical admixtures to optimize concrete mix LCA Impact per m 3 concrete Concrete mix LCA optimization tool for project specific EPD s Viscosity modifier, Concrete hardening through concrete mix optimization: minus 10-20% of concrete CO 2 -eq admixture: plus <1% of concrete CO 2 -eq 12

13 Example of application : new BASF office building in Ludwigshafen (Germany) 9350m³ concrete optimized with LCA Carbon footprint reduced with 47% 1496 ton CO2eq saved Seeking DGNB platinum certification 13

14 Applying Life Cycle Assessment (LCA) in construction Opportunities improve resource efficiency and reduce environmental impacts of buildings market innovative solutions Challenges need to develop Environmental Product Declarations (EPDs) need to assess and optimize buildings based on LCA 14

15 Level(s), EU sustainability framework tiered approach to life cycle assessment More : 15

16 Sustainable buildings on their life cycle: challenges and opportunities Buildings and constructions have significant impacts on the environment Green buildings can contribute towards meeting the Sustainable Development Goals First challenge is energy consumption in use phase renovation towards highly energy efficient and decarbonized building stock needed Life Cycle Assessment (LCA) creates opportunities for improved resource efficiency and reduced environmental impact "If you can not measure it, you can not improve it. Lord Kelvin 16

17 We create chemistry that makes question love answers. Quentin de Hults, 17