Technical Document and User Guide for the Multi-Modal Passenger Simulation Model for Comparing Passenger Rail Energy Consumption with Competing Modes (2015) / Chapter Skim
Currently Skimming:
Pages 267-271
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 267... ...
Appendix B Terms, Abbreviations and Equation Variables
|
From page 268... ...
B-1 B.1 Terms Balance speed Speed at which a train's tractive effort equals the sum of its up-grade and resistive force. Breakeven grade Speed at which a train's downgrade force equals the resistive force.
|
From page 269... ...
B-2 B.2 Abbreviations ABA – American Bus Association AC – Aircraft AREMA – American Railway Engineering and Maintenance-of-Way Association A T R I – American Transportation Research Institute Bsfc – Brake specific fuel consumption BTS – Bureau of Transportation Statistics CN – Canadian National CVT – Continuously variable transmission CY – Calendar year D – Destination DEM – Digital elevation models DMU – Diesel multiple unit DOT – Department of Transportation EMU – Electric multiple unit FE – Fuel economy FW – Freeway GC – Great circle GHG – Greenhouse gas GHGeq – Greenhouse gas equivalent HEP – Head-end power HSR – High speed rail ICAO – International Civil Aviation Organisation IPCC – Intergovernmental Panel on Climate Change IR – Inherent resistance LDT – Light duty truck LDV – Light duty vehicle LOS – Level of service (a highway capacity metric) LTO – Landing and takeoff MBTA – Massachusetts Bay Transportation Authority MY – Model year NBJ – Narrow body jet NCDC – National Climate Data Center NTD – National Transit Database
|
From page 270... ...
B-3 O – Origin OD – Origin-destination pGCkm – passenger great circle kilometer PL – Payload RDC – Rail diesel car RF – Radiative forcing RJ – Regional jet sGCkm – seat great circle kilometer skm – seat kilometer SRJ – Small regional jet TE – Tractive effort TP – Turboprop TSO – Temporary slow order UDDS – Urban Dynamometer Driving Schedule VHSR – Very high speed rail Vkm – vehicle kilometer WBJ – Wide body jet WGI – Working Group I
|
From page 271... ...
B-4 B.3 Equation Variables a Coefficient A Acceleration A Frontal area b Coefficient Cd Aerodynamic drag coefficient Cra Coefficient of rolling resistance & hysteresis Crai Tractive effort envelope coefficient Crb Coefficient of dynamic resistance Crbi Tractive effort envelope coefficient Crc Coefficient of aerodynamic resistance Crci Tractive effort envelope coefficient Crdi Tractive effort envelope coefficient dt Time step Fh Hotel power diesel generator set fuel consumption rate g Gravitational acceleration Gbe Breakeven down grade Gmx Maximum grade that can be climbed at cruise speed IR Inherent Resistance Kr Mass-equivalent rotational inertia of an axle M Mass Na Number of axles P Power R Ratio of cold-start/hot start fuel increment SF Scale factor for aerodynamic drag t Time T Temperature TE Tractive effort TEi Tractive effort Ta Ambient temperature V Speed ρ Density of air
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.