Trolley Case Study Overview: March, 2003 CO 2 Emissions Reduction Potential for Santiago, Chile...
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Transcript of Trolley Case Study Overview: March, 2003 CO 2 Emissions Reduction Potential for Santiago, Chile...
Trolley Case Study Overview: Trolley Case Study Overview: March, 2003March, 2003
COCO22 Emissions Reduction Potential for Emissions Reduction Potential for
Santiago, ChileSantiago, Chile
Center for Clean Air Policy (CCAP)
Cambio Climatico y Desarrollo (CC&D)
International Institute for Sustainable Development (IISD)
Funded by: Canadian International Development Agency (CIDA)
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Why Consider Electric Why Consider Electric Trolleys? Trolleys?
Recommended by Steering Committee as a potential project in need of further analysis
Benefits vs. diesel buses– No ground-level emissions– Reduced maintenance costs & noise– Potential to reduce CO2 emissions
Santiago has access to clean source of electricity
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Range of Key VariablesRange of Key VariablesKey Variables Low-floor
ArticulatedElectric Trolley
Low-entrance ArticulatedDiesel Bus
Vehicle Price $500,000 - $550,000 (Skoda)
$180,000(CGTS)
Infrastructure (per km)
$130,000 - $260,000(incremental) N/A
Energy Efficiency 2.6 - 3.8 kWh / km 2.0 - 2.4 km / L
Energy Price $0.10/kWh $0.45/liter
Vehicle Life 20 years 14 years
Interest Rate (%) 12% 12%
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Key Operational VariablesKey Operational Variables
Key Variables Low-floor Articulated
Electric Trolley
Low-entrance Articulated Diesel Bus
Length of Route 12 km
Station Spacing 500 m
Passengers/hour 15,000
Vehicle Capacity 125
Mean Vehicle Speed 24 km/hr 22 km/hr
Maintenance Reserve 5% 7.5%
Number of Vehicles 200 215
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1. Cost Comparisons1. Cost Comparisons
Step 1: Utilized a spreadsheet tool to compare costs of articulated diesel buses to articulated trolleys– Included capital and operating costs– Annualized all costs
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Annual Capital & Operating CostsAnnual Capital & Operating Costs
Annual Cost in $USD
Low-floor Articulated
Electric Trolley
Low-entrance ArticulatedDiesel Bus
FIXED
Vehicle $16.8M - $18.5M $7.4M
Infrastructure $0.2M - $0.5M N/A
VARIABLE
Energy $3.1M - $4.5M $2.3M - $2.8M
Maintenance $8.6M $11.1M
Labor $7.2M $7.6M
Total Cost $36.9M - 40.2M $29.2M - $29.7M
Incremental Cost $7.2M - $11.0M
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2. Energy Use2. Energy Use
Step 2: Calculated energy use – Diesel: based on measurements in Santiago
• Assumed articulated buses use 20% more energy
– Trolley: based on manufacturer data (SKODA)
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3. CO3. CO22 Emissions Emissions
Step 3: Calculated CO2 emissions
– Electric Trolleys = estimates for Santiago’s electric emissions (SIC grid)• Assumed a range of generation mixes• Calculated emissions based on generation
estimates
– Diesel Buses = Used standard factor
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2010 Estimated Electricity 2010 Estimated Electricity Emissions for SantiagoEmissions for Santiago
Energy Source
(tCO2/GWh)
2010
Clean
2010
Medium
2010
Dirty
Hydro (0) 61% 50% 50%
New Thermal (392) 17% 20% 0%
Thermal (758) 22% 30% 50%
Weighted Average 233 306 379
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4. Cost per ton CO4. Cost per ton CO22
Step 4: Estimated the Cost per tCO2
– Based upon a range of cost variables for trolleys & diesel buses
– Framed a range of potential CO2 reductions from the use of electric trolleys
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Range of CORange of CO22 Benefits From Benefits From
Electric TrolleyElectric Trolley
Trolley vs. Diesel
‘Clean’ Trolley vs. ‘Dirty’ Diesel
‘Dirty’ Trolley vs. ‘Clean’ Diesel
Trolley (kg CO2 /km) 0.6 1.4
Diesel (kg CO2 /km) 1.3 1.1
Annual Incremental Cost of Trolley
$7.2 M $11.0 M
tCO2 Savings (per yr) 8,600 - 4,000
COST per tCO2 /yr $830 n/a
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Range of CORange of CO22 Benefits From Benefits From
Electric Trolley – Electric Trolley – 100% Hydro100% Hydro
Trolley vs. Diesel
‘Green’ Trolley vs. ‘Dirty’ Diesel
‘Green’ Trolley vs. ‘Clean’ Diesel
Trolley (kg CO2 /km) 0.0
Diesel (kg CO2 /km) 1.3 1.1
Annual Incremental Cost of Trolley
$7.2 M $11.0 M
tCO2 Savings (per yr) 16,000 13,300
COST per tCO2 /yr $450 $830
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Conclusions: Electric TrolleysConclusions: Electric Trolleys
Low CO2 benefits, high costs
– 100% hydro-power increases CO2 benefits, but still expensive
Air quality, health and noise benefits not quantified
Trolley technology may be more attractive to passengers than buses
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FinFin??
Source: http://www.tbus.org.uk/gallery.htm