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Railroads and the Environment: Estimation of Fuel Consumption in Rail Transportation. Volume I. Analytical Model.

PB244150

Publication Date	1975
Personal Author	Hopkins, J. B.
Page Count	98
Abstract	The report describes an analytical approach to estimation of fuel consumption in rail transportation, and provides sample computer calculations suggesting the sensitivity of fuel usage to various parameters. The model used is based upon careful delineation of the relevant physical machanisms of energy dissipation under steady-state conditions-rolling and aerodynamic resistance (using the Davis equations), braking, idling, and locomotive power generation and conversion losses. Both simple and more complex formulations are applied as appropriate. Several classes of service are considered: branch line freight, intercity freight, conventional and high-speed passenger, and commuter. Numerous graphs illustrate typical results for specific fuel consumption as a function of speed, grade, power/weight, load factor, weight per seat, etc.
Keywords	Rail transportation Fuel consumption Cargo transportation Passenger transportation Rapid transit railways Equations Energy requirements Diesel engines Energy consumption Aerodynamic drag Braking Bearings Mathematical models Commuter rail systems Energy use DOT/5Y DOT/2C
Source Agency	Department of Transportation Federal Railroad Administration
NTIS Subject Category	91B - Transportation & Traffic Planning 97B - Energy Use, Supply, & Demand
Corporate Authors	Transportation systems Center, Cambridge, Mass.; Federal Railroad Administration, Washington, D.C. Office of Research and
Document Type	Technical Report
Title Note	Final rept. Nov 73-Oct 74.
NTIS Issue Number	197522

Railroads and the Environment: Estimation of Fuel Consumption in Rail Transportation. Volume I. Analytical Model.

Railroads and the Environment: Estimation of Fuel Consumption in Rail Transportation. Volume I. Analytical Model.
PB244150

Publication Date	1975
Personal Author	Hopkins, J. B.
Page Count	98
Abstract	The report describes an analytical approach to estimation of fuel consumption in rail transportation, and provides sample computer calculations suggesting the sensitivity of fuel usage to various parameters. The model used is based upon careful delineation of the relevant physical machanisms of energy dissipation under steady-state conditions-rolling and aerodynamic resistance (using the Davis equations), braking, idling, and locomotive power generation and conversion losses. Both simple and more complex formulations are applied as appropriate. Several classes of service are considered: branch line freight, intercity freight, conventional and high-speed passenger, and commuter. Numerous graphs illustrate typical results for specific fuel consumption as a function of speed, grade, power/weight, load factor, weight per seat, etc.
Keywords	Rail transportation Fuel consumption Cargo transportation Passenger transportation Rapid transit railways Equations Energy requirements Diesel engines Energy consumption Aerodynamic drag Braking Bearings Mathematical models Commuter rail systems Energy use DOT/5Y DOT/2C
Source Agency	Department of Transportation Federal Railroad Administration
NTIS Subject Category	91B - Transportation & Traffic Planning 97B - Energy Use, Supply, & Demand
Corporate Authors	Transportation systems Center, Cambridge, Mass.; Federal Railroad Administration, Washington, D.C. Office of Research and
Document Type	Technical Report
Title Note	Final rept. Nov 73-Oct 74.
NTIS Issue Number	197522