Commercial Marine Emission Inventory
Conference on Marine Vessels and Air Quality
Jean Marie Revelt, EPS United States Environmental Protection Agency February 1, 2001
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Overview
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Inventory methodology NOx, PM inventories for 2000 Projected NOx, PM inventories NOx Inventories for selected areas
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Inventory Methodology
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Inventory prepared for 1999 rule
– National inventory
» CI marine contribution to ambient air quality in commercial ports, along waterways may be higher
– Engines included in inventory
» Commercial, recreational, auxiliary » 3 engine categories (standards based on these)
Category 1 2 3 Displacement per cylinder Displ. < 5 liters (and power m37 kW) 5 liters [ displ. < 30 liters Displ. m30 liters
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Inventory Methodology
– C1 methodology
Emissions'Population ×Power×Load×Annual Use×Emission Factor
– C2 engine based on Corbett & Fischbeck analysis
» US Flag: Main engine data and ship operation profiles
• Similar to C1 methodology
» Foreign Flag: Cargo transported on foreign vessels in US ports
Emissions ' EmissionsTonMile×TonMilesyear
» Rely on Lloyd’s Register database
• Does not include vessels less than 100 GRT
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Results
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Estimated 2000 NOx: 1 million short tons
SI Nonroad 3% CI Nonroad 20%
Distribution of 2000 Mobile Source NOx Emissions
Highway 59%
CI Marine 7% Locomotive 9% Aircraft 1%
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Results
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Estimated 2000 PM: 42,000 short tons
Distribution of 2000 Mobile Source PM Emissions
SI Nonroad 14% Highway 34%
Aircraft 6% Locomotive 4%
CI Nonroad 36%
CI Marine 6%
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Results
2000 Commercial CI Marine NOx Emissions By Category
500 400 Thous. Short Tons 300 200 100 0
C1
45% 27% 28%
C2 C3
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Results
2000 Commercial CI Marine NOx Emissions By Flag
500 Thous. Short Tons 400 300 200 100 0 C1 C2 C3
US Flag
Foreign Flag
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Emission Projections
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Projections are based on:
Average Useful Life (Years) 15 13 17 23 23 Average Annual Growth Rate 3.5% 0.9% 1.5% 1.0% 1.0%
C1 Recreational C1 Commercial C1 Auxiliary C2 C3
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Emission Projections - NOx
1600 1400 1200 Thous. Short Tons 1000 800 600 400 200 0 2000 2010 2020 2030
Baseline
Absent any emission controls, NOx inventory is projected to increase by 38% by 2030
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Emission Projections - PM
70 60 50 Thous. short tons 40 30 20 10 0 2000 2010 2020 2030
Baseline
Absent any emission controls, PM inventory is projected to increase by 38% by 2030
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Emissions for Selected Areas
Commercial Marine Inventory Contribution to Selected Nonattainment Areas
Nonattainment Area Beaumont/Port Arthur San Diego San Francisco CA South Coast Baltim o r e % Total NOx 15 17 12 6 4 % Total PM 29 33 23 12 8
Source: Nonroad Engine and Vehicle Emission Study Report, November 1991 (Publication no. EPA-21A-2001 or EPA460/3-91-002), available at www.epa.gov/otaq/nonroad.htm
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