Adapting the city

1. Adapting the city

2. Building & Infrastructure Dr Tim Whitley Associate Director, Arup

3. Sustainable Building RetrofitAdaptation and Mitigation

4. Climate Change Impacts • Lack of resilience • High energy bills • Summer overheating • Customer discomfort 9.06OC 9.67OC 10.1OC

5. Adaptation vs Mitigation and Retrofit MitigationAdaptation Reduce energy use Increased summer temperatures Reduce water use Increased flood risk Lower carbon footprint More extreme weather events Challenge Potential increased cooling to cope with increased summer temperatures vs reducing energy use

6. Bruntwood– Adaptation and Mitigation • Three packages • Behavioural • Fabric • Services • Two categories • Suite related (impact on customers’ electricity bills) • Building related (impact on service charge energy costs)

7. Cost-benefit Analysis

8. Key Intervention examples • Envelope and environmental system strategy • High performance glazing • Solar shading through glazing and blinds • Insulation to roof and spandrel panels • Expose soffits for passive/night time cooling • Install high efficiency ventilation and conditioning systems • Maximise daylight opportunities

9. BCO Guide 2m 1m 3m Continuous glazing 0.5m Clear double glazing + internal blind Occupants 4m 3m 2m 1m Machines Blind in ventilated cavity .5 Spare 4m Lighting 3m 2m 1m High performance 66/34 glazing + internal blind .5 Façade Mitigation and Adaptation Cooling Loads 20 40 60 80 100 120 140 160 180 200 220 Total Cooling W/m2 (perimeter areas)

10. Key Intervention examples • Control & monitoring systems • Enhanced BMS, increased controls, smaller zones • Lighting control zones, low energy lighting • Extensive sub-metering and real time displays • Comprehensive behaviour change strategy • Prompt energy conscious behaviour change

11. Overall Building Carbon savings

12. 40-50% Savings

14. Adapting the city