session 2: a methodology for measuring embodied carbon to measure... · 2017-09-27 · •hempcrete...
TRANSCRIPT
Sean Lockie, Director, Faithful and Gould
Session 2: A methodology for
measuring embodied carbon
RICS Methodology to calculate embodied carbon
Sean Lockie, Faithful+Gould
Methodology to calculate embodied
carbon of materials, 2012
• Information paper targeted at the QS
community
• Product stage embodied carbon methodology
RICS 2 guides
Methodology to calculate embodied
carbon – lifecycle 2014
• Global guidance note
• Life cycle embodied carbon methodology
BS 15978
Life cycle carbon emissions
Scopes covered
Scopes covered
Embodied carbon
Operational carbon
Life cycle carbon emissions
Life cycle carbon emissions
Life cycle carbon emissions
Life cycle carbon emissions
Life cycle carbon emissions
Impacts vary depending on type of building
Product
Construction
Operational energy, water
Maintenance,repair
End of life
Product stage
More carbon in use
More carbon in product
Climate Change Act, 2008
• Legally binding
• GHG to be reduced by at least 34% by 2020 and 80% by 2050
Low Carbon Construction by IGT, 2010
Other drivers: BREEAM, CEEQUAL, LEED, Planning Authorities
Drivers for change
Not just the QS
Embodied carbon
Client
Set targets
Team track record
Architect
In addition to passive design, research low carbon materials for building envelope and finishes
Struct Engineer
Research alternative materials for foundation and structural frame
B Services Engineer
balance operational and embodied carbon savings
Project Manager
Establish ways to monitor performance
Contractor
specify work procedures and methods that avoid waste.
local sourcing
avoid half full deliveries
minimise over-ordering
reduce on-site energy consumption
How the maths works
Methodology to calculate embodied
carbon of materials, 2012
• Information paper targeted at the QS
community
• Product stage embodied carbon methodology
Royal Institution of Chartered Surveyors
Methodology to calculate embodied
carbon - life cycle, 2014
• Global guidance note
• Life cycle embodied carbon methodology
Scope of the assessment
Scope of the RICS guidance
Guide is Guide is not
Aimed at the QS Not intended to replace any of the guides that already exist (e.g. PAS 2050, Green House Gas Protocol, BS EN ISO 14040 or 15978),
Works with quantities and NRM data structure
Doesn’t go as deep as ‘bottom up’ systems such as Sigma Pro methodology
Works with buildings and infrastructure
What is in the guide
What is in the guide
Tips on how to mitigate
The guide contains benchmarks
Embodied carbon benchmarks
Floor area x benchmark
Product stage
Product stage
Product stage
Product stage
Construction stage
Maintenance / repair
How is embodied carbon measured?
A case study
M&S, Cheshire Oaks• Floor Area 20,000m2
• Located near Liverpool
• M+S ‘Plan A’
• A number of sustainability features
• A number of sustainability awards
• Carbon Champion of the Year Award,
CIBSE 2014
Sustainability features
1. Displacement ventilation
2. Thermal mass / daylight
3. CO2 refrigeration
4. Rain water harvesting
5. Biomass boiler
6. Green wall
7. Permeable paving
8. Biodiversity
9. POE
Post Occupancy Evaluation
‘Hard ‘issues
‘Hard ‘issues
‘Hard ‘issues
Back to embodied carbon...
• This presentation looks at the embodied carbon
aspects only.
• 60 year cradle to grave assessment.
• Created a baseline then...
• Quantified the reductions in total carbon achieved
against the baseline
The approach
Embodiedcarbon
Operationalcarbon
Scope of the assessment
Scope of the assessment
Foundations &
Structure
Superstructure Fit-out External Areas
Pads Floor Slabs / Decks Partitions Car Park
Perimeter Beams Main Building Frame Floor and floor finishes Yard
Ground Slab Cladding / Walling Units Ceilings Roads
Roofing Doors
External Doors Central Plant
Louvring Gas / Electricity Services
Water Services
Ventilation Services
Drainage
Lifts
Creation of a ‘baseline’ – embodied carbon
• No benchmark existed so a
baseline was created
• Baseline - No Plan A spec
• Traditional retail building
• Specifications listed (right)
Embodiedcarbon
Operationalcarbon
Baseline Agreed design
Foundations Pads and perimeter
beam
As per baseline, with
30% PFA concrete
substitution
Frame Steel frame Steel frames and
glulam joists
Upper Floor
Slab
Concrete Slab Timber Deck
Walls Masonry Hempcrete
Fit Out Plasterboard Walls;
Ceramic Floor Tiles
100% Recycled
Plasterboard; 40%
recycled Ceramic
tiles
Results – embodied carbon: life cycle stages
Embodiescarbon
Operationalcarbon
Total Embodied Carbon over 60 years
11,108 10,728
1,200
752
1,782
1,814
5,200
4,892
710
710
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
20,000t 18,896t
End Of Life
Maintenance
Onsite Activities
Delivery
Raw Materials
Em
bo
die
d C
arb
on
(tC
O2e
)
Things that contributed to reducing the embodied CO2
Shell and Core
•30% PFA substitution in Concrete Foundations, Substructure and Superstructure
•Glulam roof structure (FSC sourced) rather than concrete roof slab
•Hempcrete walls
•Removal of 60mm Screed from Ground Slab
•Timber upper floor deck, rather than reinforced concrete slab
•75% Recycled Aggregates used in External Areas
•80% Recycled content Roof Insulation
•1% Reclaimed steel in Building Frame
Things that contributed to reducing the embodied CO2
Fit Out
•100% Recycled content Fermacell partition walls
•40% Recycled content Strata flooring tiles
•40% Recycled content in Interfaceflor Carpets
It can be very granular
Embodiescarbon
Operationalcarbon
Results – embodied carbon: building zones
In summary...
Methodology to calculate embodied carbon in a building’s construction life cycle, 2014
• Global guidance note• Life cycle embodied carbon
methodology• Based on BS EN ISO 14040 / 15978• High level• Aimed at the QS
