Compressed Natural Gas Compressed Natural Gas VehiclesVehiclesIan PetersenIan Petersen

Energy DensityEnergy Density

Source: NYSERDASource: NYSERDA

StorageStorage

Cost of 10 gge CNG Cylinder by Type

0

200

400

600

800

1000

1200

1400

1600

Steel Reinforced AluminumReinforced

Composite

US

D

Empty Weight of 10 gge Storage

0

50

100

150

200

250

300

Gasoline Tank Steel Reinforced AluminumReinforced

Composite

Po

un

ds

CNG Storage VesselsCNG Storage Vessels

3 Distinct Categories3 Distinct Categories Plain Metal CylinderPlain Metal Cylinder Fiber Wrapped Metal CylinderFiber Wrapped Metal Cylinder CompositeComposite

The CNGVThe 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

RefuelingRefueling

Slow FillSlow Fill FuelmakerFuelmaker 0.46 gge/hr0.46 gge/hr Residential Natural GasResidential Natural Gas

Fast FillFast Fill About the same fill rate as conventional gas About the same fill rate as conventional gas

stationsstations Few and far betweenFew and far between

Fast Fill CNG StationsFast Fill CNG Stations

777 Stations777 Stations 150:1150:1Image:http://www.afdc.energy.gov/afdc/fuels/natural_gas_locations.htmlImage:http://www.afdc.energy.gov/afdc/fuels/natural_gas_locations.html

Combustion and EmissionsCombustion and Emissions

130 Octane rating130 Octane rating 12.5:112.5:1

Emissions reduction based on Gasoline EnginesEmissions reduction based on Gasoline Engines NONOxx by 30-60% by 30-60%

CO by 90-97%CO by 90-97% COCO22 by 25% by 25%

NMHC 50-75%NMHC 50-75%

SafetySafety

Relief ValvesRelief Valves Shutoff ValvesShutoff Valves Tank DesignTank Design Buoyancy of CNGBuoyancy of CNG CNG LEL 5% CNG LEL 5% UEL 15%UEL 15%

Images: Images: http://www.sealancers.org/Articles/tanks/tank3.jpg (top left), Powertech (top left, bottom)

Case Study: Honda GxCase Study: Honda Gx Engine: 113hp 1.8L I-4Engine: 113hp 1.8L I-4 Fuel Efficiency: 24/36/28Fuel Efficiency: 24/36/28 Fuel Capacity: 8.03 ggeFuel Capacity: 8.03 gge Range: 225 milesRange: 225 miles

Image:http://automobiles.honda.com/civic-gx/exterior-photos.aspxImage:http://automobiles.honda.com/civic-gx/exterior-photos.aspx

Other CNGVsOther CNGVs

Conversions KitsConversions Kits Diesel/CNG mix fuelDiesel/CNG mix fuel Dual Fuel: Gas/CNGDual Fuel: Gas/CNG CNG Electric HybridsCNG Electric Hybrids

ICEICE TurbineTurbine

Questions?Questions?

Images: NYSERDA and Honda Gx websiteImages: NYSERDA and Honda Gx website