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- by UNH Biodiesel Group
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Jetta TDI on biodiesel |
Jetta TDI on petroleum diesel |
Jetta 2.0L gasoline engine |
Toyota Prius on gasoline |
Toyota Fuel Cell vehicle (hydrogen) |
Dodge ESX3 (diesel-hybrid) on biodiesel |
| Vehicle cost |
$19,970 |
$19,970 |
$18,790 |
$21,520 |
$100,0003 |
$28,500 |
| Fuel efficiency |
41/48.5 |
42/50 |
24/31 |
52/45 |
5.74 |
72 |
| Vehicle range |
609/711 |
609/711 |
348/450 |
619/536 |
155 |
??? |
| Power (hp) |
90 |
90 |
115 |
70 |
110 |
??? |
| Torque (ft-lbs) |
155 |
155 |
122 |
82 (EM?) |
188 |
??? |
| Cost/mile2 |
$0.047 |
$0.040 |
$0.062 |
$0.035 |
$0.195 |
$0.03 |
| Energy density of fuel (Thousands of BTUs/gal) |
127 |
141 |
123 |
123 |
9 |
127 |
| Fossil Fuel Energy Balance6 |
3.2 |
0.83 |
0.74 |
0.74 |
0.667 |
3.2 |
| Total fossil energy input/mile8 (Thousand BTU/mile) |
0.89 |
3.7 |
6.0 |
3.4 |
2.4 |
0.55 |
- Assuming modern catalyst used with the TDI running biodiesel or ULSD.
- Assuming $1.70/gallon for gasoline, $1.80 for petroleum diesel, and $2.16/gallon for biodiesel, based on 50/50 average of city/highway
- Honda's estimate for the cost of their fuel cell vehicles in mass production in 2012
- Miles per gallon of hydrogen compressed to 5,000 psi (35 atmospheres), based on maximum range of Honda's FCV of 170 miles on a 30 gallon tank
- 30 gallons at 5,000 psi equals 3.2 kg of hydrogen (hydrogen density at 14.7 psi is 0.0003142 kg/gal, at 5000 psi it's 0.1069 kg/gal). Typical cost for very large consumers of compressed hydrogen expected to be $10/kg. So, $32 for 170 miles.
- See http://www.mda.state.mn.us/ethanol/balance.html
- Assumes hydrogen produced from steam reformation of natural gas, fossil energy balance (net energy ratio) taken from http://www.nrel.gov/docs/fy01osti/27637.pdf
- Fossil Energy Input calculated based on 50/50 average fuel mileage and energy balance of creating fuel, using 3.2:1 for biodiesel (when made from soy), 0.83:1 for petroleum diesel, 0.74:1 for gasoline, and 0.5:1 for hydrogen (based on electrolysis of water). See http://www.mda.state.mn.us/ethanol/balance.html
Energy input per mile then equals (energy density of fuel )/[(fuel efficiency (mpg))*Energy balance]
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