Adapting the city

Building & Infrastructure Dr Tim Whitley Associate Director, Arup

Sustainable Building Retrofit Adaptation and Mitigation

Climate Change Impacts Lack of resilience High energy bills Summer overheating Customer discomfort O C 9.67 O C 10.1 O C

Adaptation vs Mitigation and Retrofit MitigationAdaptation Reduce energy useIncreased summer temperatures Reduce water useIncreased flood risk Lower carbon footprintMore extreme weather events Challenge Potential increased cooling to cope with increased summer temperatures vs reducing energy use

Bruntwood– Adaptation and Mitigation Three packages 1.Behavioural 2.Fabric 3.Services Two categories 1.Suite related (impact on customers’ electricity bills) 2.Building related (impact on service charge energy costs)

Cost-benefit Analysis

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

Total Cooling W/m 2 (perimeter areas) Cooling Loads Occupants BCO Guide Machines Spare Lighting 3m Continuous glazing Clear double glazing + internal blind 2m 1m 0.5m 3m High performance 66/34 glazing + internal blind 2m 1m 4m.5.5 Blind in ventilated cavity 4m 3m 2m 1m.5 Façade Mitigation and Adaptation

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

Overall Building Carbon savings

40-50% Savings

Adapting the city