Bill Gething Sustainability+Architecture

uwe University of the West of England

HCA Workshop Masterclass June 2015

Building Design & Environment

Zero Carbon Hub Report: The Big Picture –Full Report

Comfort: a balancing act

People

Ventilation

Conduction

Equipment

Lighting

Solar gain

Active

he

atin

g

Winter Recent construction

Jul Aug Sep Oct Nov Dec Jan Feb Mar Jun Apr May

Comfort: a balancing act

Solar gain

Lighting

Equipment

People

Ventilation

Conduction

Active h

eating

Ventilation

Conduction

Active

he

atin

g

Winter New construction

Jul Aug Sep Oct Nov Dec Jan Feb Mar Jun Apr May

Comfort: a balancing act

Solar gain

Lighting

Equipment

People

Ventilation

Conduction

Ac

tive

Co

olin

g?

Summer New construction

Conduction

Solar gain

Comfort: a balancing act

Solar gain

Lighting

Equipment

People

Ventilation

Conduction

Minimise

Minimise

Control

Control

Fabric storage

+ Climate change

Summer New construction

Overwhelmed?

Consider

Modelling as a design tool … not just for verification

Gale and Snowden

2020s 2050s 2080s

Su

mm

er

me

an

da

ily m

axim

um

te

mp

era

ture

(ºC

)

32

30

28

26

24

22

20

Which Climate? CIBSE/ UKCIP ProCLiP charts

Baseline (1961-90)

Central estimate

Likely

33%

67%

Very Likely

10%

90% Me

diu

m

Lo

w

Hig

h

London, Tokyo, New York threatened

CIBSE TM48 (UKCIP02) 14 locations

PROMETHEUS (UKCP09) Exeter 43 locations

CIBSE (UKCP09) 14 locations

COPSE (UKCP09) Manchester 2 (+) locations

Low Carbon Futures (UKCP09) Herriot Watt 2 locations

PROCLIMATION (UKCP09) De Montfort

Future weather files for dynamic simulation

No Adaptation

Low Carbon Futures (UKCP09) Herriot Watt 2 locations

5 10 15 20 0

100%

80%

60%

40%

20%

0%

% of Occupied Hours > 28º C

Pro

babili

ty o

f occurr

ence

Current climate

Medium Emissions 2030

Medium Emissions 2050

Medium Emissions 2080

Overh

eating T

hre

shold

With Adaptation Measure

Low Carbon Futures (UKCP09) Herriot Watt 2 locations

5 10 15 20 0

100%

80%

60%

40%

20%

0%

% of Occupied Hours > 28º C

Pro

babili

ty o

f occurr

ence

Current climate

Medium Emissions 2030

Medium Emissions 2050

Medium Emissions 2080

Overh

eating T

hre

shold

London UHI weather files

‘76 ‘89

‘03

CIBSE TM49

Microclimatic effects

Shading

Albedo

Street canyon

Street orientation

Density

Heat emissions

Performance in practice

Windows – will they be opened?

Before it’s too late…

Noise

Rain

Security

Dirt

Pets/ children

Blinds for privacy/ dimout

Ventilation systems – will they work/ keep working?

Installation – rigid, insulated, big ducts

Commissioning

Noise

Controls - intelligible and responsive

Maintenance –screwdriver free

Guidance Innovate UK

https://www.gov.uk/government/publications/the-business-case-for-adapting-buildings-to-climate-change

https://connect.innovateuk.org/web/climate-change-adaptation

https://connect.innovateuk.org/web/climate-change-adaptation

https://www.gov.uk/government/publications/the-business-case-for-adapting-buildings-to-climate-change

Guidance NHBC Foundation & Zero Carbon Hub

Guidance Zero Carbon Hub

http://www.zerocarbonhub.org/recent-publications

Are you sitting comfortably?

Adaptive comfort threshold Arup

Te

mp

era

ture

ºC

CIBSE TM52

Solar Cooling Loads by Orientation

07:30 09:30 11:30 13:30 15:30 17:30

700

500

400

300

200

100

0

600

W/m

²

N

E

S

W

Horiz

Summer (Bracknell)

From CIBSE Guide A (2006)

Solar Cooling Loads by Orientation

07:30 09:30 11:30 13:30 15:30 17:30

700

500

400

300

200

100

0

600

W/m

² Winter (Bracknell)

W

S

E

Horiz

N

From CIBSE Guide A (2006)

Solar Cooling Loads by Orientation

07:30 09:30 11:30 13:30 15:30 17:30

700

500

400

300

200

100

0

600

W/m

² Spring (Bracknell)

S

Horiz

E

W

N

From CIBSE Guide A (2006)