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#1 2020-09-13 09:07:31

HarriettTo
Member
From: United States, Palominas
Registered: 2020-09-13
Posts: 92

The mile/gallon equivalent of 2,407.40 Btu/mile

Fuel Cell Efficiency.
Stationary Power  Replacement of conventional electric generating capacity with fuel cells would result in  significant  energy savings, ranging from 880 Btu/kWh for marginal generation to 4,171 Btu/kWh for average fossil fuel generation.
Possible efficiency gains associated with  replacement  of oil, coal and natural gas-fired generation would be as follows:     Potential Efficiency Gains Associated with Replacement of Existing Fossil Fuel Generation (Btu/kWh).
Potential Energy Savings from  Replacement  of Oil-Fired Generation   Potential Energy Savings from Replacement of Coal-Fired Generation   Potential Energy Savings from Replacement of Natural Gas-Fired Generation   Potential Average Energy Savings Resulting from Replacement of Marginal Generating Capacity   Potential Average Energy Savings from Replacement of Conventional Fossil Fuel Generation     4,609   4,288   3,976   880   4,171       This means that for each megawatt of existing conventional fossil fuel generation replaced with capacity from a fuel cell almost 35 billion Btu to over 40 billion Btu of energy, the equivalent of as much as 290,000 gallons of No.
2 fuel oil, would be saved annually.
At 40 MW, the possible annual energy savings would be almost 1.6 trillion Btu, which is equivalent to nearly 12  million gallons  of No.
2 fuel oil.
With a CHP  application  and assuming additional increased efficiency from reduced transmission line losses, these savings could be doubled.
Potential Annual Energy Saving Equivalents for Each Megawatt of Generation Replaced with Capacity from a Fuel Cell.
1 MW Btu and Oil Equivalent Energy Savings      1 MW   35 – 40 Billion Btu     1 MW No 2 Oil Equivalent   250,000- 290,000 Gallons      40 MW Btu and Oil Equivalent Energy Savings     40 MW   1.4 – 1.6 Trillion Btu     40 MW No.
2 Oil Equivalent   10 – 12 Million Gallons      Transportation  The amount of energy savings using fuel cells for transportation applications range from 2,407.40 Btu/mile for passenger cars to 16,264.20 Btu/mile for transit buses.
The gallon per mile equivalent for a passenger car is 0.019 gal/mile and 0.12 gal/mile for a transit bus.
It is important to note that although these numbers seem small,  measurement  is made in gallons/mile, not miles per gallon.
The mile/gallon equivalent of 2,407.40 Btu/mile, which is the energy saved for passenger cars, is  approximate ly 52 mpg.
The first table below shows the potential equivalent energy savings using fuel cells for transportation applications compared to conventional fuels and  technologies .
The next table shows average miles per gallon estimates for conventional and fuel cell vehicles.
Energy Savings from  Replacement  of Conventionally-Powered Vehicles with Hydrogen-Fueled Fuel Cell Vehicles (Btu/mile).
Replacement of Gasoline Powered Passenger Cars   Replacement of Gasoline Powered Light Trucks   Replacement of Conventional Diesel Transit Buses     2,407.40   4,505.10   16,264.20      gal/mile equivalent energy savings      .019   0.037   0.12         Average Expected Energy Use (mpge).
Passenger Car   Light Truck   Transit Bus     Hydrogen Fuel Cell   Gasoline Powered Car   Hydrogen Fuel Cell   Gasoline Powered Light Truck   Hydrogen Fuel Cell   Diesel Powered Transit Bus     81.2   29.3   49.2   21.5   12.4   3.86     FCEBs have an average fuel economy of approximately 7.9 miles per kilogram of hydrogen, which equates to approximately 7 miles per diesel gallon equivalent (DGE).
The average fuel efficiency of conventional diesel transit buses is approximately 3.87 miles per gallon.  The use of hydrogen has the potential to reduce diesel fuel use by approximately 8,800 gallons of diesel fuel per vehicle, per year.

(see Connecticut Hydrogen and Fuel Cell Development Plan)

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