Intermittent Electrification with Battery Locomotives and the Post-Diesel Future of North American Freight Railroads

Changing attitudes, regulations, public policy, and international treaties concerning fossil fuels are likely to lead freight railroads toward carbon-neutral technologies, yet only electric traction matches the performance of diesel-electric locomotives. The tremendous power requirements of freight trains make efforts to reduce greenhouse gas (GHG) emissions challenging, but the prospect of 7.2?megawatt-hour battery-electric locomotives (BELs) offers promise, and intermittent electrification can facilitate battery charging. Train performance calculations under simulated real-world conditions show four 7.2?megawatt-hour BELs can power 8,000-ton trains up to 230?mainline miles unassisted, with average energy consumption of 12.5?watt-hours/ton-mile. This permits discontinuous electrification of major freight lines, leaving “gaps” of up to 200?mi to reduce capital costs, especially in rugged terrain or where the power grid is sparse. Massive onboard battery arrays and intermittent access to the electrical grid for traction power and recharging provide great energy savings by recycling energy now lost when traveling downhill or braking. A case study of a hypothetical Class I railroad found intermittent electrification with BELs more than 60% more cost-effective than contiguous electric districts, and dramatically reduced engine changes. To reduce railroad GHG emissions, governments must support technical development, show that electrification works in various North American settings, and develop institutional-financial frameworks to incentivize intermittent electrification with BELs, all in the context of massive environmental and capacity upgrades to electrical networks. Given proper assistance and incentives, early 21st century railroads may find discontinuous overhead-wire electrification offers great promise in operating terms.

• Record URL:
  • https://doi.org/10.1177/03611981241245996
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • The views expressed in this paper are those of the authors and do not necessarily reflect the official policy of any railroads, manufacturers, government bodies, or any other organizations.© The Author(s) 2024.
• Authors:
  • Lu, Alex
  • Allen, John G
• Publication Date: 2024-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1691-1718
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Volume: 2678
  • Issue Number: 11
  • Publisher: Sage Publications, Incorporated
  • ISSN: 0361-1981
  • EISSN: 2169-4052
  • Serial URL: http://journals.sagepub.com/home/trr

Subject/Index Terms

• TRT Terms: Access; Electric batteries; Electric locomotives; Energy consumption; Freight trains; Greenhouse gases; Grids (Transmission lines); Regenerative braking
• Geographic Terms: North America
• Subject Areas: Energy; Environment; Freight Transportation; Railroads;

Filing Info

• Accession Number: 01926388
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 3 2024 4:24PM