King County Metro Battery Electric Buses
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Zero-Emission Bus Evaluation Results: King County Metro Battery Electric Buses FEBRUARY 2018 FTA Report No. 0118 Federal Transit Administration PREPARED BY Leslie Eudy Matthew Jeffers National Renewable Energy Laboratory COVER PHOTO Courtesy of King County Metro (Seattle) Proterra Catalyst fast-charge battery electric bus. Photo courtesy of National Renewable Energy Laboratory. DISCLAIMER This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. The United States Government does not endorse products of manufacturers. Trade or manufacturers’ names appear herein solely because they are considered essential to the objective of this report. Zero-Emission Bus Evaluation Results: King County Metro Battery Electric Buses FEBRUARY 2018 FTA Report No. 0118 PREPARED BY Leslie Eudy Matthew Jeffers National Renewable Energy Laboratory 15013 Denver West Parkway Golden, CO 80401 SPONSORED BY Federal Transit Administration Office of Research, Demonstration and Innovation U.S. Department of Transportation 1200 New Jersey Avenue, SE Washington, DC 20590 AVAILABLE ONLINE https://www.transit.dot.gov/about/research-innovation FEDERAL TRANSIT ADMINISTRATION i MetricMetric Conversion Conversion Table Table Metric Conversion Table SYMBOL WHEN YOU KNOW MULTIPLY BY TO FIND SYMBOL LENGTH in inches 25.4 millimeters mm ft feet 0.305 meters m yd yards 0.914 meters m mi miles 1.61 kilometers km VOLUME fl oz fluid ounces 29.57 milliliters mL gal gallons 3.785 liters L ft3 cubic feet 0.028 cubic meters m3 yd3 cubic yards 0.765 cubic meters m3 NOTE: volumes greater than 1000 L shall be shown in m3 MASS oz ounces 28.35 grams g lb pounds 0.454 kilograms kg megagrams T short tons (2000 lb) 0.907 Mg (or "t") (or "metric ton") TEMPERATURE (exact degrees) 5 (F-32)/9 oF Fahrenheit Celsius oC or (F-32)/1.8 FEDERAL TRANSIT ADMINISTRATION iv FEDERAL TRANSIT ADMINISTRATION ii REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruc- tions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503. 1. AGENCY USE ONLY 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED February 2018 April 2016–March 2017 4. TITLE AND SUBTITLE 5. FUNDING NUMBERS Zero-Emission Bus Evaluation Results: King County Metro Battery Electric Buses 6. AUTHOR(S) Leslie Eudy, Matthew Jeffers 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESSE(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER National Renewable Energy Laboratory 15013 Denver West Parkway FTA Report No. 0118 Golden, CO 80401 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSORING/MONITORING AGENCY REPORT U.S. Department of Transportation NUMBER Federal Transit Administration Office of Research, Demonstration and Innovation FTA Report No. 0118 East Building 1200 New Jersey Avenue, SE Washington, DC 20590 11. SUPPLEMENTARY NOTES [https://www.transit.dot.gov/about/research-innovation] 12A. DISTRIBUTION/AVAILABILITY STATEMENT 12B. DISTRIBUTION CODE Available from: National Technical Information Service (NTIS), Springfield, VA 22161. Phone 703.605.6000, Fax 703.605.6900, email [[email protected]] TRI 13. ABSTRACT This report summarizes the experience and results from a battery electric bus (BEB) demonstration funded by the Federal Transit Administration (FTA) under the Transit Investments for Greenhouse Gas and Energy Reduction (TIGGER) program. In 2010, King County Metro transit agency in Seattle, Washington, received funding from a TIGGER award to add three zero-emission BEBs to its fleet. The BEBs in service at King County Metro are 40-foot fast-charge electric transit buses built by Proterra. FTA is collaborating with the U.S. Department of Energy (DOE) and DOE’s National Renewable Energy Laboratory (NREL) to conduct in-service evaluations of advanced technology buses developed under its programs. This report presents evaluation results for the BEBs in comparison to a selection of baseline buses. The focus of the analysis is on one year of data from April 2016 through March 2017. 14. SUBJECT TERMS 15. NUMBER OF PAGES Federal Transit Administration; Office of Research, Demonstration, and Innovation; 67 Transit Investments for Greenhouse Gas and Energy Reduction; TIGGER 16. PRICE CODE 17. SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATION 19. SECURITY CLASSIFICATION 20. LIMITATION OF ABSTRACT OF REPORT OF THIS PAGE OF ABSTRACT Unclassified Unclassified Unclassified FEDERAL TRANSIT ADMINISTRATION v TABLE OF CONTENTS 1 Executive Summary 6 Section 1: Introduction 7 Section 2: Zero-Emission Bus Evaluations Planned 7 Select Projects 8 Evaluation Protocol 15 Section 3: KC Metro BEB Evaluation Results 15 Fleet Profile—KC Metro 16 Bus Technology Descriptions 18 Charging and Maintenance Facilities 19 In-Service Operations Evaluation Results 45 Summary of Achievements and Challenges 48 Appendix: KC Metro Fleet Summary Statistics 53 Fleet Summary Statistics—SI Units 54 Additional Charts for KC Metro Evaluation 55 Acronyms and Abbreviations 56 Glossary FEDERAL TRANSIT ADMINISTRATION vi LIST OF FIGURES 5 1 Figure 3-1: KC Metro Service Area Map with Shaded Bellevue Region 7 1 Figure 3-2: KC Metro Proterra Catalyst Battery Electric Bus 7 1 Figure 3-3: KC Metro New Flyer Diesel Hybrid Bus 7 1 Figure 3-4: Gillig Diesel Bus Operated by KC Metro for Sound Transit 8 1 Figure 3-5: KC Metro New Flyer Electric Trolley Bus 9 1 Figure 3-6: Fast-Charge Station at KC Metro Park-and-Ride 0 2 Figure 3-7: Route Map for KC Metro Routes 226 and 241 1 2 Figure 3-8: Battery Charge and Discharge Power and State of Charge for One Example Charge Cycle 22 Figure 3-9: Cumulative Miles and Hours for Battery Bus Fleet 3 2 Figure 3-10: Average Monthly Miles for All Four Bus Fleets 6 2 Figure 3-11: Monthly Availability for All Four Bus Fleets and Reasons for Unavailability for Battery Fleet 7 2 Figure 3-12: Overall Availability for All Four Bus Fleets During Evaluation Period 8 2 Figure 3-13: Monthly Charges and Monthly Energy Consumption for Battery Fleet 9 2 Figure 3-14: Monthly Fuel Economy for Battery, Hybrid, and Diesel Bus Fleets 1 3 Figure 3-15: Monthly Fuel Cost per Mile for Battery, Hybrid, and Diesel Bus Fleets 32 Figure 3-16: Breakdown of Monthly Electric Utility Costs 4 3 Figure 3-17: Summary of Propulsion-Related Roadcalls for All Four Bus Fleets, Organized by Subsystem 5 3 Figure 3-18: Cumulative Bus MBRC and Propulsion-Related MBRC for All Four Bus Fleets 7 3 Figure 3-19: Monthly Scheduled and Unscheduled Maintenance Cost per Mile for All Four Bus Fleets 9 3 Figure 3-20: Monthly Maintenance Cost per Mile by System for Battery Bus Fleet 0 4 Figure 3-21: Monthly Maintenance Cost per Mile by System for Hybrid Bus Fleet 1 4 Figure 3-22: Monthly Maintenance Cost per Mile by System for Diesel Bus Fleet 2 4 Figure 3-23: Monthly Maintenance Cost per Mile by System for Trolley Bus Fleet 5 4 Figure 3-24: Monthly Operations (Maintenance and Fuel) Cost for Battery, Hybrid, and Diesel Bus Fleets 4 5 Figure A-1: Monthly Average Price for Electricity and Diesel Fuel 4 5 Figure A-2: Monthly Availability for Battery Buses FEDERAL TRANSIT ADMINISTRATION vii LIST OF TABLES 2 Table ES-1: Summary of Evaluation Results 8 Table 2-1: Selected Evaluation Projects 8 Table 2-2: DOE/FTA Performance, Cost, and Durability Targets for FCEBs 16 Table 3-1: System Descriptions for the Battery Electric, Hybrid, Diesel, and Trolley Buses 23 Table 3-2: Average Monthly Mileage (Evaluation Period) 25 Table 3-3: Summary of Availability by Bus for All Four Fleets 27 Table 3-4: Summary of Availability and Unavailability by Category for All Four Fleets 30 Table 3-5: Mileage, Fuel Use, and Fuel Economy 33 Table 3-6: Utility Electricity Rates 36 Table 3-7: Total Work Order Maintenance Costs 38 Table 3-8: Work Order Maintenance Cost per Mile by System 43 Table 3-9: Propulsion-Related Work Order Maintenance Costs by System 45 Table 3-10: Overall Operations (Maintenance and Fuel) Cost per Mile 48 Table A-1: Fleet Operations and Economics 48 Table A-2: Maintenance Costs 49 Table A-3: Breakdown of Maintenance Costs by System 53 Table A-4: Fleet Operations and Economics (SI) 53 Table A-5: Maintenance Costs (SI) FEDERAL TRANSIT ADMINISTRATION viii ACKNOWLEDGMENTS This report could not have been possible without the cooperation of King County Metro, Proterra, and others. King County Metro staff provided data on the electric and baseline buses, reviewed analyses and reports, and participated in meetings to discuss the agency’s overall experience. Proterra provided selected data from the on-board data loggers and reviewed reports. The U.S. Department of Transportation’s Federal Transit Administration provided funding for the evaluation. The authors thank the following individuals: King County Metro George Stites Leo Hrechanyk Jim Hunley Kim Martin Daniel Santon Cindy Sattler Bonnie Davis-Losey Larry Schwerzler Lynn Matteoni Proterra Mike Finnern Seneca Schepmann Derrick Allen U.S. Department of Transportation Federal Transit Administration, Office of Research, Demonstration and Innovation Sean Ricketson Mike Baltes Marcel Belanger U.S. Department of Transportation Research, Development, and Technology Office Shawn Johnson FEDERAL TRANSIT ADMINISTRATION ix ABSTRACT This report summarizes the experience and results from a battery electric bus (BEB) demonstration funded by the Federal Transit Administration (FTA) under the Transit Investments for Greenhouse Gas and Energy Reduction (TIGGER) program.