A LIMITED INVESTIGATION INTO REGENERATIVE BRAKING AND ENERGY STORAGE FOR MASS TRANSIT SYSTEMS
This study examines the technical and economic aspects of a regenerative braking/flywheel energy storage subway system. In order to define the analytical models accurately, it was necessary to gather data on the trains, rail network, schedules, and ancillary equipment. Data on projected costs of flywheels, motors, rails, and other equipment were also gathered for use in the economic analysis. During this data gathering phase, it was decided that the Massachusetts Bay Transportation Authority (MBTA) Red Line would be the source of the most representative and complete data. The problem was to determine what, if any, combination of energy storage devices and high conductivity rails would yield a subway system with a lower life cycle cost. The primary goal of the study was to compare the system costs of wayside storage with those of on-board storage. Using data provided by MBTA, power levels vs. time and rail losses were calculated and used to determine the sizing and location of energy storage units. From the amounts of energy storage required, the costs of the flywheels and i/o equipment were calculated. Utilizing these modules for load leveling was also considered. However, since the energy storage required for load leveling is much greater than that required for regenerative braking, a separate study is needed to examine this in detail.
Draper (Charles Stark) Laboratory, Incorporated555 Technology Square
Cambridge, MA USA 02139
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA USA 02142
National Science FoundationOffice of Systems Integration and Analysis
Washington, DC USA 20550
- Eisenhaure, D
- O'Dea, S
- Publication Date: 1978-3
- Pagination: 47 p.
- TRT Terms: Analysis; Braking; Costs; Dynamic braking; Economic analysis; Economic factors; Energy; Energy conservation; Energy storage systems; Flywheels; Life cycle analysis; Life cycle costing; Modules (Electricity); Power; Public transit; Rail (Railroads); Railroad tracks; Railroad trains; Railroad transportation; Rapid transit; Regenerative braking; Scheduling; Subways
- Identifier Terms: Massachusetts Bay Transportation Authority
- Uncontrolled Terms: Conductivity; Cost analysis; Modules
- Geographic Terms: Massachusetts
- Old TRIS Terms: Digestion; Subway railways
- Subject Areas: Economics; Energy; Environment; Finance; Highways; Public Transportation; Railroads; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00181988
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: DOT-TSC-UMTA-77-53 Final Rpt.
- Files: NTIS, TRIS
- Created Date: Nov 14 1981 12:00AM