The Downer Energy and Emissions Measure
Energy Efficiency Opportunities Workshop 2011
Lionel Pero
80
3400
850
50
6
$ 7.5 billion
Delivering Sustainable Value
(Idemitsu)
Delivering Whole-of-Lifecycle Mining Solutions
Delivering Sustainable Value
“You Can’t Manage What You Can’t Measure”
Litres / Bank Cubic Metre does not take into account:
• Differences between mine sites
• Changes within individual mines
• Changing haul routes, inclines & distances
• Increasing dump heights or pit/underground depths
Key Performance Indicator
Litres / Bank Cubic Metre
Coal Mine
Hard Rock
Mine
Factor
Difference
4.85
29.18
6.0
Delivering Sustainable Value
The Downer Energy & Emissions Measure
Indicators:
GJ & tCO2-e
1. GJ/tonne-km for haul trucks, water trucks & graders
TM
_
tonnage moved x equivalent flat haul
2. GJ/tonne material moved for excavators, dozers & ancillary plant
Dump Location
Considers:
•
Fuel types
•
Plant types, models & fuel burn
•
Material type, volume & mass
•
Source & destination locations
•
Distance moved & elevation change
Dig Location
Key Performance Indicator
Coal Mine
Hard Rock
Mine
Factor
Difference
Truck = litres / (tonnage moved x equivalent flat haul)
0.054
0.058
1.1
Excavator and ancillary = litres / total tonnage moved
0.235
0.386
1.6
Dig Location
Delivering Sustainable Value
Delivering Sustainable Value
Tracking Project Energy Performance
Increase in digger and truck
shifts to catch up on coal & O/B
losses after floods
0.00600
0.0060
0.00500
0.0050
0.00400
0.0040
0.00300
0.0030
0.00200
0.0020
Non-haul GJ/tonne
0.00100
During power plant shut-down
period, focussed on moving
waste over short distances to
the in-pit dumps
0.0010
Haul GJ/tonne.km
0.00000
0.0000
Month 12
Month 11
Month 10
Month 9
Month 8
Month 7
Month 6
Month 5
Month 4
Month 3
Month 2
Month 1
Low utilisation of dozer push &
excavator production.
Delivering Sustainable Value
0.00490
Haul Trucks, Water Trucks & Graders (GJ/tonne-km)
0.00420
GJ / tonne.km
0.00350
0.00280
0.00210
0.00140
0.00070
0.00000
Site 1
Site 2
Site 3
Site 4
Site 5
Site 6
Site 7
Site 8
Excavators, Dozers & Ancillary Plant (GJ/tonne material moved)
0.01500
GJ / tonne
0.01200
0.00900
0.00600
0.00300
0.00000
Site 1
Site 2
Site 3
Site 4
Site 5
Site 6
Site 7
Site 8
Delivering Sustainable Value
Factors Influencing Energy Intensity
• Rock hardness & fragmentation
• Density of material excavated & hauled
• Material moved by blasting
• Fleet selection, including size of equipment
• Mine planning, production scheduling, pit design & dump
design
• Haul road optimisation (length, gradients, design & materials)
• Haul road & dump configuration optimisation
• Plant & equipment operator behaviour
• Plant & equipment technical efficiencies
Delivering Sustainable Value
Delivering SustainableValue
Greenhouse Gas Efficiency at Commodore Mine
0.00050
0.00040
0.00045
0.00035
0.00040
0.00030
0.00035
0.00025
0.00030
0.00020
Non-haul GHG tCO2-e/tonne
0.00025
0.00015
Haul GHG tCO2-e/tonne.km
0.00020
0.00010
FY 05/06
FY 06/07
FY 07/08
FY 08/09
FY 09/10
FY 10/11