U.S. Jet Fuel Use and CO2 Emissions Inventory for Aircraft Below ICAO CO2 Standard Thresholds
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U.S. Jet Fuel Use and CO2 Emissions Inventory for Aircraft below ICAO CO2 Standard Thresholds Final Report Prepared for: U.S. Environmental Protection Agency Laurel Driver U.S. Environmental Protection Agency Office of Air Quality Standards and Planning 109 TW Alexander Drive Research Triangle Park, NC 27711 Prepared by: Eastern Research Group, Inc. 1600 Perimeter Park Drive Suite 200 Morrisville, NC 27560 May 7, 2015 EPA Contract No. EP-D-11-006 Work Assignment 5-05 This page is intentionally left blank. TABLE OF CONTENTS Page 1.0 INTRODUCTION ........................................................................................................ 1 2.0 T-100 ....................................................................................................................... 4 3.0 GAATA................................................................................................................. 15 4.0 COMPARISONS ....................................................................................................... 18 5.0 BACKCASTING AND FORECASTING ......................................................................... 19 6.0 QA/QC .................................................................................................................. 21 7.0 REFERENCES .......................................................................................................... 26 APPENDIX A. AIR TAXI MODELS BY AIRCRAFT CATEGORY FOR EDMS/T-100 DATA ................ A-1 i LIST OF TABLES Page Table 2-1. Number of Aircraft in each Aircraft Category ...............................................................5 Table 2-2. Time and Mode Data ......................................................................................................6 Table 2-3. Engine Assignments by Aircraft Make and Model ........................................................8 Table 2-4. Summary ofT-100Activity Data ...................................................................................10 Table 2-5. Aircraft and Engine Specific Emission Factors from EDMS Run ...............................11 Table 2-6. Aircraft and Engine Specific Cruising Fuel Consumption Rates .................................12 Table 2-7. 2012 T-100AircraftandEngine Specific Fuel Use and CO2Emissions .........................14 Table 3-1. FAA Registry Aircraft Population by MTOM Range ..................................................15 Table 3-2. Finalized GAATA Activity for Aircraft Below the MTOM CO2 Standard Thresholds ..............................................................................................................16 Table 3-3. GAATA Fuel Consumption Rates by Aircraft Type (Block fuel/Block time) ............16 Table 3-4. 2012 Fuel Use and CO2 Emission Estimates by Aircraft Below the CAEP MTOM Thresholds by Type and Mode ..............................................................................17 Table 4-1. T-100 and GAATA Combine CO2 Emissions (tons) Summary ...................................18 Table 5-1. Historical Fraction of Jet, Turboprop Powered Aircraft, and Helicopters Below the CAEP MTOM Thresholds for the ICAO CO2 Standards ......................................19 Table 5-2. Adjustment Factors for General Aviation Aircraft Based on Jet Fuel Energy Consumption ..........................................................................................................20 Table 5-3. Growth Factors Based on Forecasted Jet Fuel Energy Consumption ..........................20 Table 5-4. Backcasted/Forecasted Small Jet, Turboprop, and Helicopter CO2 Emissions (tons) .21 Table 6-1. QA Summary Table ......................................................................................................23 ii LIST OF FIGURE Page Figure 1-1. Summary of Activity Data Used to Quantify Fuel and CO2 Emissions from Aircraft Below ICAO Reporting Thresholds.........................................................................3 iii 1.0 Introduction In 2010, the International Civil Aviation Organization’s Committee on Aviation Environmental Protection (CAEP), with the U.S. Environmental Protection Agency (EPA) participation, agreed to develop an aircraft carbon dioxide (CO2) standard, and CAEP expects to finalize the standard in February 2016. In November 2010, CAEP decided that the CO2 standard will be applicable to subsonic jets with a weight threshold of maximum takeoff mass (MTOM)1 greater than 5,700 kg (12,566 lbs) and aircraft equipped with turboprop engines with a MTOM greater than 8,618 kg (19,000 lbs). Applying these MTOM thresholds, ERG identified four categories of aircraft, large transport jets, regional jets, large turboprops, and large business jets2 that correspond to the above applicability thresholds that CAEP has agreed to for the aircraft CO2 standard. We have also identified the aircraft categories that do not meet the CAEP applicability thresholds into the following aircraft classes: small turboprops and small business jets. In addition, CAEP’s 3 4 applicability exclude piston-engine aircraft and helicopters, and because CAEP requirements apply only to civil aircraft, the aircraft CO2 standard also does not apply to military aircraft. The objective of this study is to estimate jet fuel usage and CO2 emissions (from this jet fuel usage) in the United States for aircraft below the CAEP MTOM thresholds (excluding jet fuel usage by military aircraft). To evaluate the current and projected CO2 emissions for the aircraft (that use jet fuel) below the CAEP MTOM thresholds, fuel use and CO2 emissions were developed for these aircraft (below the MTOM thresholds) for domestic flights and international flights that originate from a U.S. airport. Emissions estimates were calculated for the base year 2012 and projected for years 2020, 2030, and 2040 using Federal Aviation Administration Forecast data. The 2015 EPA Inventory of U.S. Greenhouse Gas Emissions and Sinks (EPA, 2015) report includes a category for emissions from general aviation aircraft jet fuel. The category includes large and small business jets, large and small turboprops, and helicopters (with gas turbine engines), which is more inclusive than the CAEP applicability thresholds. Data from the 2015 EPA Inventory of U.S. 1 The terms maximum takeoff mass and maximum takeoff weight are used interchangeably throughout the report. 2 The classes of aircraft are broken down in a general manner for the purpose of showing which aircraft are included and excluded from the ICAO aircraft CO2 standard. As described earlier, CAEP has specifically identified MTOM thresholds for subsonic jet and turboprop aircraft that clearly indicate which aircraft will be covered by the international CO2 standard being developed (and which aircraft will not be covered by the international standard). For the aircraft classes that will be covered by the CAEP CO2 standard, ICAO generally refers to them as follows: turboprops, business jets, regional jets, single aisle aircraft, small twin aisle aircraft, large twin aisle aircraft, and large quad aircraft. However, a subset of turboprops and business jets will not be included in the CO2 standard (based on the MTOM thresholds). 3 Piston-engine aircraft primarily operate using aviation gasoline, though it is recognized that a small number use Jet A fuel (i.e., diesel-powered piston aircraft). 4 There are both piston-engine and turbine-engine helicopters. CAEP’s applicability thresholds exclude both types of helicopters. 1 Greenhouse Gas Emissions and Sinks (EPA, 2015) was used to back cast 2012 emissions to 1990, 1995, 2000, 2005, 2010 and to develop 2013 estimates. The 2015 EPA Inventory of U.S. Greenhouse Gas Emissions and Sinks (EPA 2015) states that U.S. aircraft emissions include emissions from the U.S. international aviation bunker fuels category, and this U.S. international aviation bunker fuels category includes emissions from combustion of fuel purchased in and used by aircraft departing from the United States (regardless of whether they are a U.S. flagged carrier). To ensure the products of this project align with data used in the 2015 GHG Emission and Sinks document, data obtained from the Federal Aviation Administration’s (FAA) 2012 General Aviation Part 135 Activity Surveys (GAATA, 2013) was assumed to be fuel purchased and used within the United States. Data obtained from the Bureau of Transportation Statistics (BTS) T-100 Domestic Segment also accounted of activity within the United States; while the International Segment accounted for aircraft departing from the U.S. (assumed to be included in the U.S. international aviation bunker fuel category) (FAA, 2012). In general, aviation activities can be classified as: • Part 915 – non-commercial general aviation, corporate flight departments, limited for- hire activity (flight training, etc.) • On-Demand Part 1356 operations • Scheduled Part 135 operations • Part 1217 (large aircraft) The GAATA survey covers Part 91 and On-Demand Part 135, while the T-100 dataset covers Part 121 and Part 135 operators with more than $20 Million in annual revenue. This provides both an overlap and a gap between the two datasets. The overlap occurs between GAATA and T-100 for large On-Demand Part 135 operators with more than $20M in annual revenue that include commercial air taxi operations. Conversely, neither database covers smaller Part 135 Scheduled operators with less than $20 million in revenue. Regarding the overlap, adjustments were made to the GAATA data to account for air taxis reported in the T-100 data. However, note