Adapting the city

Building & InfrastructureDr Tim WhitleyAssociate Director, Arup

Sustainable Building RetrofitAdaptation and Mitigation

Climate Change Impacts

Lack of resilience

High energy bills

Summer overheating

Customer discomfort 9.06OC

9.67OC

10.1OC

Adaptation vs Mitigation and Retrofit

Mitigation AdaptationReduce energy use Increased summer temperatures

Reduce water use Increased flood risk

Lower carbon footprint More extreme weather events

ChallengePotential 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 strategyHigh 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

20 40 60 80 120 140 160 180100 200 220

Total Cooling W/m2

(perimeter areas)

Coo

ling

Loa

ds

Occupants

BCO Guide

Machines

Spare

Lighting

3m Continuous glazing

Clear double glazing + internal blind

2m1m0.5m

3m

High performance 66/34 glazing + internal blind

2m1m

4m

.5

Blind in ventilated cavity

4m3m2m1m.5

Façade Mitigation and Adaptation

Key Intervention examples

Control & monitoring systemsEnhanced BMS, increased controls, smaller zones

Lighting control zones, low energy lighting

Extensive sub-metering and real time displays

Comprehensive behaviour change strategyPrompt energy conscious behaviour change

Overall Building Carbon savings

40-50% Savings

Adapting the city