overheating in homes – bill gething masterclass
TRANSCRIPT
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
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
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)