Compressed%20Natural%20Gas%20Vehicles

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Compressed Natural Gas Vehicles

• Ian Petersen

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Energy Density
Source NYSERDA
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Storage
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CNG Storage Vessels

• 3 Distinct Categories
• Plain Metal Cylinder
• Fiber Wrapped Metal Cylinder
• Composite

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The CNGV
Image http//www.cng.cz/miranda2/export/sites/www
.cng.cz/en/natural_gas/Natural_Gas_Vehicles/design
_imgs/04_4_01a_eng.jpg
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Refueling

• Slow Fill
• Fuelmaker
• 0.46 gge/hr
• Residential Natural Gas
• Fast Fill
• About the same fill rate as conventional gas
  stations
• Few and far between

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Fast Fill CNG Stations

• 777 Stations
• 1501
• Imagehttp//www.afdc.energy.gov/afdc/fuels/natura
  l_gas_locations.html

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Combustion and Emissions

• 130 Octane rating
• 12.51
• Emissions reduction based on Gasoline Engines
• NOx by 30-60
• CO by 90-97
• CO2 by 25
• NMHC 50-75

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Safety

• Relief Valves
• Shutoff Valves
• Tank Design
• Buoyancy of CNG
• CNG LEL 5
• UEL 15

Images http//www.sealancers.org/Articles/tanks/t
ank3.jpg (top left), Powertech (top left, bottom)
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Case Study Honda Gx

• Engine 113hp 1.8L I-4
• Fuel Efficiency 24/36/28
• Fuel Capacity 8.03 gge
• Range 225 miles
• Imagehttp//automobiles.honda.com/civic-gx/exteri
  or-photos.aspx

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Other CNGVs

• Conversions Kits
• Diesel/CNG mix fuel
• Dual Fuel Gas/CNG
• CNG Electric Hybrids
• ICE
• Turbine

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Questions?
Images NYSERDA and Honda Gx website