It is unclear to me the meaning. >Average BTU consumed Per Passenger mile by mode of travel:
Analogy follows. >SUV: 4,591 >Air: 4,123 >Bus: 3,729 >Car: 3,672 >Train: 2,138 > >Source: Bureau of Transportation Statistics >http://199.79.179.77/btsprod/nts/Ch4_web/4-20.htm > (notes from site above) >NOTES: To calculate total Btu, multiply fuel consumed (see tables 4-21, 4-22, >4-24, 4-25) by > 135,000 Btu/gallon for air carrier, > 125,000 Btu/gallon for passenger car, other 2-axle 4-tire vehicle, and > motorcycle, and > 138,700 Btu/gallon for transit motor bus and Amtrak. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ MH wrote: >What I'm trying to understand is mile-per-gallon per-passenger per-vehicle Perhaps I should restate that - What I am trying to understand is BTUs per-passenger, per-mile, per-vehicle. NOTE: all mpg rounded off > > SUV: 125,000 Btu/gallon divide by 4,591 BTUs Per Passenger mile = 27 mpg (*) SUV: 16 mpg (and other Light Trucks - pkups, vans) 125,000 Btu/gallon divide by 4,591 BTUs Per Passenger mile = 27 mpg divide by 1.64 passengers per vehicle equals 16 mpg.... 4,591 BTUs divide by 1.64 persons equals 2,799 BTUs per-person per-mile. > Air: 135,000 Btu/gallon divide by 4,123 BTUs Per Passenger mile = 33 mpg > Bus: 138,700 Btu/gallon divide by 3,729 BTUs Per Passenger mile = 37 mpg > Car: 125,000 Btu/gallon divide by 3,672 BTUs Per Passenger mile = 34 mpg (*) Car: 21 mpg 125,000 Btu/gallon divide by 3,672 BTUs Per Passenger mile = 34 mpg divide by 1.59 passengers per vehicle equals 21 mpg.... 3,672 BTUs divide by 1.59 persons equals 2,309 BTUs per-person per-mile. >Train: 138,700 Btu/gallon divide by 2,138 BTUs Per Passenger mile = 65 mpg >Lupo: 138,700 divide by 100 mpg = 1,387 BTUs Per Passenger mile (*) Lupo: 100 mpg or 872 BTUs per-person per-mile 138,700 Btu/gallon divide by 1,387 BTUs Per Passenger mile equals 100 mpg.... 1,387 BTUs divide by 1.59 persons equals 872 BTUs per-person per-mile. (*) Passenger-miles are derived by multiplying vehicle-miles by an average occupancy rate for that vehicle type based on data provided by the Federal Highway Administration, Nationwide Personal Transportation Survey, 1977, 1983, 1995. Average vehicle occupancy rates are as follows: [1995] passenger car 1.59 other 2-axle 4-tire vehicle 1.64 http://199.79.179.77/btsprod/nts/Ch4_web/4-22.htm ~~~~~ Average Fuel Efficiency of U.S. Passenger Cars and Light Trucks (mpg) [1980, 1985, 1990-1999] USA http://199.79.179.77/btsprod/nts/Ch4_web/4-23.htm Table 1.10 Motor Vehicle Mileage, Fuel Consumption, and Fuel Rates [1973 - 2000] USA Passenger Cars Vans, Pickup Trucks, and Sport Utility Vehicles Trucks All Motor Vehicles http://www.eia.doe.gov/emeu/mer/txt/mer1-10 Table 2.8 Motor Vehicle Mileage, Fuel Consumption, and Fuel Rates, [1949-1999] USA http://www.eia.doe.gov/emeu/aer/txt/tab0208.htm www.eia.doe.gov Thank you for the link. ------------------------ Yahoo! Groups Sponsor ---------------------~--> FREE COLLEGE MONEY CLICK HERE to search 600,000 scholarships! http://us.click.yahoo.com/iZp8OC/4m7CAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
