# Savings

The savings realized by running the GTI Bi-Fuel System is directly related to the cost of diesel fuel, cost of gas, and the number of hours of operation. The following is an example is a cost comparison between running a 1000 kW generator on 100% diesel and on Bi-Fuel with a 65% gas-to-diesel ratio in continuous operation. A number of assumptions are made in this example which are clearly stated in order to clarify the calculations.

FACTS AND ASSUMPTIONS | |

Fuel consumption @ 1000 kW: | 54 gph (100% diesel) |

Hours per year | 8000 |

Gas/Diesel ratio | 65% |

Diesel cost ($/gal) | $3.50 per gallon |

Natural gas cost ($/mcf) | $11.00 per mcf |

hhv of #2 diesel | 140,000 btu/gal |

hhv of natural gas | 1,000 btu/scf |

Gas Equivalent Gallon (GEG) | 140 scf/gal |

100% DIESEL OPERATION | |

Diesel use per hour | 54 gallons |

Diesel cost per hour | $189.00 (54 x $3.50) |

Diesel cost per year | $1,512,000 ($189 x 8000) |

BI-FUEL OPERATION | |

Diesel use per hour | 18.9 gph (54 x 0.35) |

Diesel cost per hour | $66.15 (18.9 x $3.50) |

Gas use per hour | 4914 scf (54 x 0.65 x 140) |

Gas cost per hour | $54.05 (4914/1000 x $11.00) |

Total fuel cost per hour | $120.20 ($66.15 + $54.05) |

SAVINGS | |

Bi-Fuel Savings per Hour | $68.80 ($189.00 -$120.20) |

Bi-Fuel Savings per 8000 hours | $550,368.00 ($68.90 x 8000) |

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