How Many Cu Feet Of Cng In 1 Gge

[BUILD TWC]

Can someone tell me how many cu feet and/or cu inches. Thanks

[TOMTGT]

Re: How Many Cu Feet Of Cng In 1 Gge

Actually CNG is metered by mass weight, 5.66 lbs of natural gas is 1 GGE.

depending on the BTU of your local gas it will run between 114 and 125 cubic feet of gas. The IRS has a differant number.

The technology of the dispenser is very simple but weights and measurment confused the issue by establishing a GGE and not selling gas by weight like the rest of the world sells CNG.

It really does not take long before you understand that your cost per mile are alot better for CNG than gasoline. The GGE opened the window for marketers to mess with pricing based to Gasoline price.

When Weights and Measurements comes out and checks the dispenser they use a scale or a mas weight prover to calibrate the dispenser. The GGE display is just math after that. The dispenser is just a big scale with a calculator for the display.

See www.tulsagastech.com then go to the links page and their is a link to how gas is measured and sold. There also a article on the CNG prover about this on the same website. We try to put all of this information on there as we see the need to explain something like this. We have this site chuck full of stuff like this.

Tom Sewell

[afvman]

Re: How Many Cu Feet Of Cng In 1 Gge

Hello et al,

Tom is absolutely right.

I'd add another layer to the onion...BTU content. It will have an effect on emissions and range...and varies widely across the country. Oklahoma is blessed with high BTU content gas, but Ohio isn't. So, check yours.

afvman

p.s. your gas company should provide a spec sheet on their pipeline gas quality for n/c!

[CNG MOTORS]

Re: How Many Cu Feet Of Cng In 1 Gge

we buy NG by the therm is AZ and it's 1.25 therms to a GGE

[Idarusskie]

Re: How Many Cu Feet Of Cng In 1 Gge

which leads me to wonder how much of the gas you buy for you house is methane and how much is CO2 or even water vapor.

The gas line is not a pure product nor is it the same year round. But then neither is gasoline.

[CNG MOTORS]

Re: How Many Cu Feet Of Cng In 1 Gge

As long as my cars run on it and it stays cheap it can be manure for all I care

[Larryect]

Re: How Many Cu Feet Of Cng In 1 Gge

Interesting discussion.

I have noticed at times a significant decrease in mileage. This is not a tank to tank change but seemed to last for a couple months and then improved. I was suspicious that gas quality had changed but did not really know.

[jblue]

Re: How Many Cu Feet Of Cng In 1 Gge

See www.tulsagastech.com then go to the links page and their is a link to how gas is measured and sold.

Tom,

I could not find a "links page" from the main tgt.com website. Am I missing it somehow?

John


-- edit: And so it goes, right after posting I find it buried in with option number six.

[Idarusskie]

Re: How Many Cu Feet Of Cng In 1 Gge

As long as my cars run on it and it stays cheap it can be manure for all I care

ya..... but you can not burn water vapor or carbon dioxide.

Methane is manure gas....:-)

[Curtis]

Re: How Many Cu Feet Of Cng In 1 Gge

Although there may be many trace gas' present in pipeline quality gas, well gas will have varying amounts of propane, ethane, pentane, butane and a few others I don't recall at the moment. You here to this referred to as "hot gas". Trace amounts of carbon dioxide and water vapor may be there as well. Thus the need for a good dryer on home well's, if being used for a vehicle refueling device.

[rkcarguy]

Re: How Many Cu Feet Of Cng In 1 Gge

ya..... but you can not burn water vapor or carbon dioxide.

Methane is manure gas....:-)

Mad max beyond thunderdone style

Isn't this going to vary based on your pressure?
One can assume 3600psi I guess.

[rkcarguy]

Re: How Many Cu Feet Of Cng In 1 Gge

I agree with the therm part, but 1 cubic ft of a compressable gas is going to vary with pressure. Weight is really the answer.

[Curtis]

Re: How Many Cu Feet Of Cng In 1 Gge

SoCal gas uses 5.56 Lb per gge.

[CraziFuzzy]

Re: How Many Cu Feet Of Cng In 1 Gge

You sure that 5.56 figure is not a type somewhere curtis? I was under the impression that gge was a defined unit by the california weights and measures that defines it as being 5.66lbs when referring to natural gas.

[Curtis]

Re: How Many Cu Feet Of Cng In 1 Gge

You sure that 5.56 figure is not a type somewhere curtis? I was under the impression that gge was a defined unit by the california weights and measures that defines it as being 5.66lbs when referring to natural gas.

Like I said, that number came from SoCal Gas. If you have something published through weights & Measures that might resolve it. I suspect that both numbers could be right, based on variance in BTU content in different area's.