david ross / chris pountney l 2013 launch... · david ross / chris pountney aecom. england building...
TRANSCRIPT
-
Part of the BRE Trust
David Ross / Chris PountneyAECOM
-
England Building Regulations Part L 2013
Non-domestic buildings
08 October 2013
-
Content
• Target for 2013, trajectory to Zero Carbon in 2019
• Approach to Carbon Target Setting
• Costs and Benefits
• Other minor amendments to Approved Document L2A
• Changes to Approved Document L2B
Page 3
-
Zero Carbon
• Trajectory to Zero Carbon – 2013, 2016 and 2019
• Same Zero Carbon hierarchy as domestic
• Wide range of achievable reductions in non-dom buildings
• Hence greater need for “aggregate approach”
Page 4
-
Recap on 5 criteria for Part L2A compliance
1. Building Emission Rate ≤ Target Emission Rate (reg. 26)
2. Limits on design flexibility
3. Limiting the effects of solar gains in summer
4. Quality of construction & commissioning
5. Providing information / O&M instructions
Page 5
-
Cost / Benefit Analysis used to determine target
Page 6
Actual Building
Notional Building
BER
TER
Actual U-values and efficiencies
Actual size, shape, orientation, uses,
weather and system types but....
....notional U-values and efficiencies
Concurrent Notional Recipe Approach
-
Cost / Benefit Analysis used to determine target
Concurrent Notional Building Packages Modelled For Consultation
Page 7
Fabric
Element Unit Package A (2010
Notional)
Package B Package C Package D
Roof U-value (W/m2.K) 0.18 0.18 0.16 0.1
Wall U-value (W/m2.K) 0.26 0.26 0.20 0.20
Floor U-value (W/m2.K) 0.22 0.22 0.2 0.15
Window U-value (W/m2.K) 1.8 1.8 1.6 1.4
Window G-Value 40% (10% FF) 40% (10% FF) 40% (10% FF) 40% (10% FF)
Window Light transmittance 71% 71% 71% 71%
Roof-light U-value (W/m2.K) 1.8 (15% FF) 1.8 (15% FF) 1.6 (15% FF) 1.4 (15% FF)
G-Value 43% 43% 43% 43%
Roof-light Light transmittance 67% 67% 67% 67%
Air-permeability m3/m2/hour 5 3 3 3
-
Cost / Benefit Analysis used to determine target
Page 8
Building Services
Element Unit Package 1 (2010 Notional)
Package 2 Package 3
Lighting Luminaire lm/ circuit watt 55 65 65
Occupancy control Yes/no Yes Yes Yes
Daylight control Yes/no Yes Yes Yes
Heating efficiency Heating and hot water (side lit) 88% 91% 91%
Heating efficiency Heating and hot water (top lit)– i.e. gas-radiant spaceheating
86% 91% 91%
Central Ventilation SFP (w/l/s) 1.8 1.8 1.8
Terminal Unit SFP (w/l/s) 0.5 0.4 0.3
Cooling SEER 4.5 4.5 4.5
Heat recovery % 70% 70% 70%
Variable speed control offans and pumps
Yes/no – multiple sensors Yes Yes Yes
Demand control (mechvent only)
Yes/no – CO2 sensing withvariable speed
No Yes Yes
-
Aggregate Approach – Percentage reduction on 2010 for notional building package
Page 9
A1 A2 A3
Warehouse (Distribution) 0.0% 5.6% 8.0%
Office (Deep-plan, AC) 0.0% 11.9% 19.5%
Warehouse (Retail) 0.0% 6.8% 10.9%
Office (Shallow-plan, AC) 0.0% 12.2% 18.9%
Hotel (5-star) 0.0% 8.8% 11.6%
Secondary School 0.0% 8.3% 10.6%
Aggregate 0.0% 8.8% 13.5%
-
Results – Percentage improvement on Part L 2010
Page 10
A1 A2 A3
0.0% 8.8% 13.5%
B1 B2 B3
1.6% 10.3% 15.0%
C1 C2 C3
3.8% 12.3% 17.1%
D1 D2 D3
6.2% 14.7% 19.4%
-
Proposed Notional building packages
Page 11
Targetaggregatereduction
8%Resultant
target reduction
11%Resultant
target reduction
14%Resultant
target reduction
20%Resultant
target reduction
Warehouse(distribution) A2 5.6% B2 8.9% C3 16.1% C3+1.6% 20.1%
Office (Deep-plan, AC) A2 11.9% A2 11.9% A2 11.9% A3+1.6% 23.4%
Warehouse(Retail) A2 6.8% B2 8.0% C3 13.6% C3+1.6% 16.2%
Office (Shallow-plan, AC) A2 12.2% A2 12.2% A2 12.2% A3+1.6% 23.1%
Hotel (5-star) A2 8.8% C2 11.0% C2 11.0% C3+1.6% 15.0%
SecondarySchool A2 8.3% C2 11.0% C2 11.0% C3+1.6% 17.4%
PV required on notional building
None None None
Panel area equivalent to 1.6% of floor area
applied to roof of each building
-
Cost / Benefit Analysis used to determine target
Carbon Abatement Curve
Page 12
-
Resultant Notional Building for 9% aggregate reduction
Page 13
Element Side lit or unlit (Heating only)
Side lit or unlit (Includes cooling)
Toplit
Roof U-value (W/m2.K) 0.18 0.18 0.18Wall U-value (W/m2.K) 0.26 0.26 0.26Floor U-value (W/m2.K) 0.22 0.22 0.22Window U-value (W/m2.K) 1.6 (10% FF) 1.6 (10% FF) N/AG-Value (%) 40% 40% N/ALight Transmittance (%) 71% 71% N/ARoof light U-value (W/m2.K) N/A N/A 1.8 (15% FF)G-Value (%) N/A N/A 55%Light Transmittance (%) N/A N/A 60%
-
Resultant Notional Building for 9% aggregate reduction
Page 14
Element Side lit or unlit (Heating only)
Side lit or unlit (Includes cooling)
Toplit
Air-permeability (m3/m2/hour), note: GIA = Gross Internal AreaGIA ≤ 250m2 5 5 7250m2 < GIA ≤ 3,500m2 3 3 73,500m2 < GIA ≤ 10,000m2 3 3 510,000m2 < GIA 3 3 3
-
Resultant Notional Building for 9% aggregate reduction
Page 15
Element Side lit or unlit (Heating only)
Side lit or unlit (Includes cooling)
Toplit
Lighting Luminaire (lm / circuit watt) 60 60 60
Occupancy control (Yes/No) Yes Yes YesDaylight control (Yes/No) Yes Yes YesMaintenance Factor 0.8 0.8 0.8Constant illuminance control No No No
-
Resultant Notional Building for 9% aggregate reduction
Page 16
Element Side lit or unlit (Heating only)
Side lit or unlit (Includes cooling)
Toplit
Heating efficiency 91% 91% 91%Central SFP (W/l/s) 1.8 1.8 1.8Terminal Unit SFP (W/l/s) 0.3 0.3 0.3Cooling (SEER / SSEER) N/A 4.5 / 3.6 4.5 / 3.6Cooling (mixed mode) (SSEER) N/A 2.7 2.7
Heat recovery efficiency (%) 70% 70% 70%Variable speed control Yes Yes YesDemand control ventilation Yes Yes Yes
-
Other Minor Changes to AD L2A
Treatment of Lighting
• 2010– Actual design lux level irrelevant – rebased to notional building
value.– So supermarket designed to 2000 lux, rebased to notional building
800 lux.
• 2013– Actual installed lighting wattage used so penalising overlit spaces.– Maintenance factors are assumed in the notional and should be
included in calculated values in the actual– Constant illuminance controls are available in the actual– LENI method can be used to show compliance with Criterion 2
Page 17
-
Other Minor Changes to AD L2A
Treatment of District Heating
• 2010– Notional CO2 emission factor for heat supplied from district heating
same as in actual. – Little carbon benefit from connection to district heating.
• 2013– Minimum CO2 emission factorapplied to notional building.– Allows carbon benefit where efficient district heating is employed.
Page 18
0
0.05
0.1
0.15
0.2
0.25
0.3
0 0.05 0.1 0.15 0.2 0.25 0.3
Not
iona
l CO
2 Fa
ctor
(kgC
O2/
m²)
Actual CO2 Factor (kgCO2/m²)
-
Other Minor Changes to AD L2A
Removal of Accredited Construction Details (ACDs)
• No quality assured accredited construction details schemes have been approved by the Secretary of State.
• The confidence factor of 0.02 W/mK or 25 per cent is no longer applied.
Page 19
-
Changes to AD L2B
• No change to the fabric standards for replacement or renovation
• See separate presentation on the Non-Domestic Building Services Compliance Guide
Page 20