Views: 138

Reply to This

Replies to This Discussion

Wow....gotta love this pic.  Only wish all the stations had cng.

Seems like the fastest way to cng would be to require public utility companies who distribute NG to install public access points.. That would fill in the gaps that exist across the nation...

As usage increased, private companies like convenient stores would come on line..

 

Disclaimer: That's current prices in CA with a little photo enhancement to add the CNG. :)

Thats great.

In places where they DO sell CNG for vehicles, what unit is CNG priced in?  MCF?  MMBTU? 

 

The sign above seems to be priced in "dollars per equivalent to a gallon of gasoline." 

 

I'd hate to see the US consumer refuse to use CNG because the price for 1 MMBTU is higher than the price for a gallon of gasoline, even though it takes you much further than a gallon of gasoline.

i found this conversion chart.

Table of GGE

Fuel GGE BTU/unit
Gasoline (base)[2] 1 US gallon 114,000 BTU/gal
Gasoline (conventional, summer)[2] 0.996 US gallon * 114,500 BTU/gal
Gasoline (conventional, winter)[2] 1.013 US gallon * 112,500 BTU/gal
Gasoline (reformulated gasoline, ethanol)[2] 1.019 US gallon * 111,836 BTU/gal
Gasoline (reformulated gasoline, ETBE)[2] 1.019 US gallon * 111,811 BTU/gal
Gasoline (reformulated gasoline, MTBE)[2] 1.020 US gallon * 111,745 BTU/gal
Gasoline (10% MBTE)[3] 1.02 US gallon 112,000 BTU/gallon
Gasoline (regular unleaded)[4] 1 US gallon 114,100 BTU/gal
Diesel #2[4] 0.88 US gallons 129,500 BTU/gal
Biodiesel (B100)[4] 0.96 US gallons 118,300 BTU/gal
Bio Diesel (B20)[4] 0.90 US gallons 127,250 BTU/gal
Liquid natural gas (LNG)[4] 1.52 US gallons 75,000 BTU/gal
Compressed natural gas (CNG)[4] 126.67 cu ft (3.587 m3) 900 BTU/cu ft
Hydrogen at 101.325 kPa 357.37 cu ft 319 BTU/cu ft[5]
Hydrogen by weight 0.997 kg (2.198 lb)[6] 119.9 MJ/kg (51,500 BTU/lb)[7]
Liquefied petroleum gas(propane) (LPG)[4] 1.35 US gallons 84,300 BTU/gal
Methanol fuel (M100)[4] 2.01 US gallons 56,800 BTU/gal
Ethanol fuel (E100)[4] 1.500 US gallons 76,100 BTU/gal
Ethanol (E85)[4] 1.39 US gallons 81,800 BTU/gal
Jet fuel (naphtha)[8] 0.97 US gallons 118,700 BTU/gal
Jet fuel (kerosene)[8] 0.90 US gallons 128,100 BTU/gal
Electricity 33.40 kilowatt-hours * 3,413 BTU/(kW·h) [9][10]
*calculated based on 114,000 BTU/gal base gasoline

 

i still don't know how cng is marketed to the driving consumer, in terms of a "unit". i did read that under different physical conditions,( temp/pressure) , the GGE can change.

kj

I saw where Boone said that the CNG equivalent of a gallon of gasoline was $1.40 or so. I went with it.  Your chart seems a lot different than that though.
KJ, just realize the values shown above are generally net (or lower) heating value but energy is bought and sold on a gross (or higher) heating value basis.  Also, because most of the commodities shown are mixtures of components their actual heating value can vary, especially CNG and LNG. 
Mac, generally you see CNG prices quoted on the basis of gasoline gallon equivalent (GGE) at stations.  Home use would likely be measured and priced on "therms" which is equivalent to 100,000 Btu's.
I will take the $1.39 for sure
Be nice if they could come up with a BTU usage per mile average for cng versus gasoline for various vehicles

PG, generally CNG and gasoline usage should be the same on a Btu/Mile basis because the two fuels have the same efficiency in a spark ignited engine.  For existing CNG light duty vehicles the fuel consumption is estimated at about 4,969 Btu per mile on a gross basis.  

 

When CNG is compared versus diesel it requires ~ 11% more energy due to the lower effiency of spark ignited versus diesel engines.

RSS

Support GoHaynesvilleShale.com

Not a member? Get our email.

Groups



© 2024   Created by Keith Mauck (Site Publisher).   Powered by

Badges  |  Report an Issue  |  Terms of Service