Beyond Zero Emissions - Zero Carbon Australia Stationery Energy Plan
Zero Carbon HUB
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Transcript of Zero Carbon HUB
ZERO CARBON HUB
Rob PannellHead of Housebuilding
PURPOSE AND STRATEGIC OBJECTIVES
Facilitate the mainstream delivery of low and zero carbon homes
Provide leadership and create confidence
Reduce risk and clear obstacles
Disseminate information
ROLE OF THE ZERO CARBON HUB
OUR CURRENT POSITION
New Domestic
New Non -Domestic
Existing Domestic
Existing Non -
Domestic
Building Energy
Consumer Skills
Examples
FIVE WORKSTREAMS
PROCESS
EXAMPLES
JOURNEY TO ZERO CARBON HOMES
3 4
6
JOURNEY TO ZERO CARBON HOMES
70%4.5
12
Energy Efficiency
The latest developments
Defining the Fabric Energy Efficiency Standard for zero carbon homes
13
Scene Setting - Policy
14
Zero Carbon Hierarchy
Energy Efficiency
On-site LZC tech. or connected heat
Allowable Solutions
70%
Car
bo
n
Co
mp
lian
ce
TG
S
cop
e
Zer
o C
arb
on
Scope of ‘Energy Efficiency’
15
Building fabric U-values
Thermal bridging
Air permeability
Thermal mass
Solar, metabolic, lighting & appliance gains
Heating / cooling appliances (boilers, etc)
Mechanical ventilation
Hot water
Active controls
Fixed lighting
All LZC technologies
Energy Efficiency Standard
Carbon Compliance Standardheat
power
LZC tech
nology
16
RECOMMENDATION:Metric for Energy Efficiency
kWh/m²/yr space heating & space cooling demand
Performance standard With design guidance
Design Flexibility
Takes into account building form
Promotes innovation
Known level of performance
Known ‘currency’ internationally
Specifications Modelled
BaselineSpec A
(NV)Spec B (MVHR)
Spec B (NV)
Spec C- (MVHR)
Spec C- (NV)
Spec C (MVHR)
Spec C (NV)
Spec D (MVHR)
External Walls
0.28 0.25 0.18 0.18 0.15 0.15 0.15 0.15 0.15 – 0.09
Party Walls 0.5 0 0 0 0 0 0 0 0
Floor 0.2 0.2 0.18 0.18 0.15 0.15 0.15 0.15 0.15 – 0.08
Roof 0.16 0.15 0.13 0.13 0.11 0.11 0.11 0.11 0.10 – 0.06
Windows1.8
(double)1.5
(double)1.4
(double)1.4
(double)1.2
(double)1.2
(double)0.8
(triple)0.8
(triple)1.0 – 0.6 (triple)
Doors 1.6 1.4 1.2 1.2 1 1 1 1 0.8
Air leakage (m³/hr/m²)
7 5 3 3 3 3 1 3 1.26 – 0.41
Thermal bridging (W/m²K)
0.08 0.06 0.05 0.05 0.04 0.04 0.04 0.04 0.04
VentilationNatural(extract
fans)
Natural (extract
fans)MVHR
Natural (extract
fans)MVHR
Natural (extract
fans)MVHR
Natural (extract
fans)MVHR
Current practice
PassivHaus equivalent
Modified AECB Silver
Standard
U-v
alu
es (
W/m
²K)
Spec C but double glazed & air leakage = 3
EST APEE Standard
EST BPEE Standard =
between Spec A & Spec B
18
0
10
20
30
40
50
60
70
80
90
100
Fabr
ic E
nerg
y Effi
cien
cy S
tand
ard
(kW
h/m
²/yr
) Current practice (CP)
CP + No heat lossthrough party wallSpec A
Spec B
Spec C-
Spec C
Spec D (PassivHaus)
Series9
Apartment Blocks Mid Terrace Houses
Detached Houses
End Terrace & Semi-detached
Houses
Task Group Recommendation of Level
Will have to work
harderSimilar build specs
RECOMMENDATION: LevelSpace Heating & Space Cooling Demand, kWh/m²/yr
What this meansEnergy demand reduction
19
0
50
100
150
200
250
300
350
1900 1995 2002 Currentpractice
2016Recomm-endation
Ener
gy D
eman
d (k
Wh/
m²/
yr)
Space heating
Hot water
Regulated electricity
Unregulated electricity
20
What this meansRelationship with 70% Carbon Compliance
0%
10%
20%
30%
40%
50%
60%
70%
Small apartment Semi-detachedhouse
Detached house
% C
O2 R
educ
tion*
Additional CO2reduction requiredfrom on-site LZCtechnologies orconnected heat toachieve 70% CarbonCompliance
CO2 reduction fromFabric EnergyEfficiency Standard(+ gas boiler)
* Calculated as per the Zero Carbon consultation document assumptions
CO2 reduction from Fabric Energy Efficiency Standard (+ gas boiler)
Additional CO2
reduction required from on-site LZC technologies or connected heat to achieve 70% Carbon Compliance
Carbon Compliance
Decision Criteria:Task Group Assessment
22
Capital CostEnergy Efficiency Measures
-£30,000
-£20,000
-£10,000
£0
£10,000
£20,000
£30,000
Baseline Spec A (NV) Spec B (NV) Spec C- (NV) Spec C (NV)
Net
pre
sent
cos
t
Fabric Capex
Fabric Capex
Whole Life Cost: Carbon ComplianceSemi-detached House
23
Basis:
• 70% carbon compliance
• Over 60 years
Assumptions:• Net present ‘extra
over’ costs• Energy inflation =
RPI + 2.5%, • Discount rate = 5%• Full costs exclusive
of land take
24
Whole Life Cost: Carbon ComplianceSemi-detached House
-£30,000
-£20,000
-£10,000
£0
£10,000
£20,000
£30,000
Baseline Spec A (NV) Spec B (NV) Spec C- (NV) Spec C (NV)
Net
pre
sent
cos
t
PV Capex
SHW Capex
Fabric Capex
Fabric Capex
CC (70%) Capex
25
-£30,000
-£20,000
-£10,000
£0
£10,000
£20,000
£30,000
Baseline Spec A (NV) Spec B (NV) Spec C- (NV) Spec C (NV)
Net
pre
sent
cos
t
Replacement &Maintenance
PV Capex
SHW Capex
Fabric Capex
CC (70%) Capex
Whole Life Cost: Carbon ComplianceSemi-detached House
26
-£30,000
-£20,000
-£10,000
£0
£10,000
£20,000
£30,000
Baseline Spec A (NV) Spec B (NV) Spec C- (NV) Spec C (NV)
Net
pre
sent
cos
t
Replacement &Maintenance
PV Capex
SHW Capex
Fabric Capex
Operationalsavings
CC (70%) Capex
Whole Life Cost: Carbon ComplianceSemi-detached House
27
-£30,000
-£20,000
-£10,000
£0
£10,000
£20,000
£30,000
Baseline Spec A (NV) Spec B (NV) Spec C- (NV) Spec C (NV)
Net
pre
sent
cos
t
Replacement &Maintenance
PV Capex
SHW Capex
Fabric Capex
Operationalsavings
CC (70%) Capex
Total net cost
Whole Life Cost: Carbon ComplianceSemi-detached House
28
Supplementary Work Required
Zero Carbon Hub Government Research
Integration into CfSH consultation CfSH
Health / Air permeability / Ventilation Task Group Part F Required
Certification, Verification & Audit Task Group Part L Required
Actual dwelling performance Facilitation TSB / other Required
Land take costs Task group
Design GuidanceTask Group /
industry
SAP 2009 modelling tool development / rebasing
CC Assumptions Task Group
SAP / Part L
Additional dwelling modelling Required
Overheating Required
29
Recommendations Summary
Metric
kWh/m²/yr
Space heating + Space cooling demand
Level
Implementation
2016 with interim step in 2013 Strong section in CfSH consultation Strongly worded ministerial statement
Timeline implications
Blocks of flats and mid terrace houses: 39 kWh/m²/yr
Semi-detached, end terrace and detached houses: 46 kWh/m²/yr
30
Allowable Solutions
The latest developments
3131
July 2009 Ministerial Statement
Allowable solutions that received broad support:
Further carbon reductions on site...
Energy efficient appliances...
Advanced forms of building control system...
Exports of low carbon or renewable heat...
Investments in LZC community heat infrastructure.
Others remain under consideration:
Retrofit
Offsite renewable electricity
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Thankyou for Listening