steel structures: culture & sustainability · emissions the “technical fix” pv, solar...
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Steel Structures:
Culture & SustainabilityIstanbul, 22 September 2010
Sustainable Steel Constructionby Dr Roger Pope
Technical Consultant
to the
British Constructional Steelwork Association
and Tata/Corus Plc
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Introduction
What does sustainability mean?
Where are we now?
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Triple bottom line
Economic (Profit)
Social (People)
Environmental (Planet)
Prudent use of natural resources
Reduction of waste and emissions
Protecting the ozone layer
Preventing acid rain
Reducing global warming potential (GWP)
Methane (CH4)
Carbon dioxide (CO2) => “Zero carbon” objective
Carbon or energy?
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Prudent resource use
Steel is 98% iron
We live on an iron planet
80% of the core
5% of the crust
No threat to sources of iron
Responsible sourcing is the
issue Sustainability Charter Membership
Steel sourced from ISO 14001 certified steelmakers
Application of BCSA/SCI carbon footprinting tool
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Emissions the “technical fix”
PV, solar thermal, wind, biofuels, geothermal, nuclear
Current global energy demand is 16TW
To generate13TW globally we need to construct:
Every second for the next 25 years:
100 sqm of PV
50 sqm of solar thermal
One Olympic pool of biofuel algae
Plus:
One 100m diameter wind turbine every 5 minutes
One 100MW geothermal steam turbine every 8 hours
One 3GW nuclear power plant every week
24 are being built in China; 2 in the EU
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Devonshire Building
University of Newcastle
BREEAM excellent
Greywater recycling
Energy efficient
Photovoltaic panels
Climate responsive façade
Passive displacement
ventilation
Exposed thermal mass
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Devonshire Building
University of Newcastle
BREEAM excellent
Greywater recycling
Energy efficient
Photovoltaic panels
Climate responsive façade
Passive displacement
ventilation
Exposed thermal mass
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Devonshire Building
University of Newcastle
BREEAM excellent
Greywater recycling
Energy efficient
Photovoltaic panels
Climate responsive façade
Passive displacement
ventilation
Exposed thermal mass
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Devonshire Building
University of Newcastle
BREEAM excellent
Greywater recycling
Energy efficient
Photovoltaic panels
Climate responsive façade
Passive displacement
ventilation
Exposed thermal mass
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Civil Justice Centre
Manchester
Innovative and iconic
BREEAM excellent
Natural ventilated
Naturally lit
Environmental veil and
light shelves
Double-skin facade
Borehole cooling
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Civil Justice Centre
Manchester
Innovative and iconic
BREEAM excellent
Natural ventilated
Naturally lit
Environmental veil and
light shelves
Double-skin facade
Borehole cooling
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Civil Justice Centre
Manchester
Innovative and iconic
BREEAM excellent
Natural ventilated
Naturally lit
Environmental veil and
light shelves
Double-skin facade
Borehole cooling
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Common factors
Pursuit of BREEAM rating
Use of natural ventilation, natural light
Controlled use of energy
Use of PV
Heat pumps and heat recovery
Focus on carbon as a measure
Attention to water usage
Use of steel
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The maze of regulations
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The standards
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Life cycle analysis
Information needed for EPD for product life cycle
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Environmental Product Declarations
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Re-usability and recyclability
Unparalleled recyclability through multi-cycling
No significant deterioration of its properties
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Re-usability and recyclability
Unparalleled recyclability through multi-cycling
No significant deterioration of its properties
Structural steel
80% recycled as scrap charge for furnaces
Further 19% is dismantled and re-used directly
Only 1% lost to rust, dust or landfill
Heavy
profiles
Light
sectionsCladding Decking Other
Recycled % 80 83 78 65 85
Reused % 19 17 21 15 5
Landfilled % 1 0 1 20 10
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Teesside Melting Shop
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Rubble or re-use?
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Rubble or re-use?
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Timber at end-of-life
UK data used in BRE Green Guide:
From construction activities:
Landfill 46%
Incineration 5%
Recycling 36%
Reuse 13%
From demolition activities:
Landfill 58%
Incineration 6%
Recycling 23%
Reuse 13%
Methane from landfill
An atmospheric lifetime of 12 ± 3 years
GWP of 72 over 20 years or 25 over 100 years
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Fabric energy storage
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“Thermal mass”
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Fabric energy storage
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Active fabric energy storage
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Active fabric energy storage
E=mc2 system Ecological Multifunctional Climate Ceiling
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Sustainable Steel Construction Natural resource use is about responsible sourcing
Steel can be multi-cycled
Steel buildings can have low embodied carbon and can be “zero carbon” in operation
Design quality in steel is innovative and visibly high Good engineering properties which maximise performance
Quick and efficient construction
Off-site manufacture with low waste
Steel construction is the safe solution
Steel buildings “tread lightly on the ground”
Steel buildings are ideal for adaptability and re-use
A steel building is a “warehouse of its parts”
Steel construction is well-placed with a responsible attitude towards its obligations
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STEEL – The legacy material of choice