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Unregistered
11-14-2008, 02:56 PM
What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated

JohnS
11-15-2008, 05:02 AM
What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated

There is no "correct formula" as the energy content of natural gas varies several percent according to source. A precise number requires quantitative analysis of the gas composition.

Howver, Wikipedia gives typical values of gross heating value (HHV):
http://en.wikipedia.org/wiki/Natural_gas
For natural gas
One cubic foot of natural gas produces about 1,030 BTU/SCF (38.4 MJ/Nm³)
Note that "standard" and "normal" volumes are measured at different temperatures.

Unregistered
11-08-2009, 05:09 PM
1000 = MJ/GJ
so if 1 cubic meter of NG = 38.3 MJ then 1000/38.3 @ 26.1 cubic meters / GJ

Unregistered
04-25-2010, 09:17 AM
I have a similar question regarding natural gas.

If I am paying \$9.99/GJ - how can I convert that to see how
much I would be paying per cubic meter?

JohnS
04-25-2010, 09:30 AM
I have a similar question regarding natural gas.

If I am paying \$9.99/GJ - how can I convert that to see how
much I would be paying per cubic meter?

See post #3 and divide by 26.1 m³/GJ. You are paying about \$0.383/m³. However, this figure is using a typical heat contnet. The actual heat content can vary %5 or even 10% depending on the origin, and therefore chemical composition, of the gas.

Unregistered
05-14-2010, 02:35 AM
the price for blast furnace gas is in gigajoule, and i have to convert it to m3
Can anybody help me with a formula?
Thank you.

JohnS
05-14-2010, 03:14 AM
the price for blast furnace gas is in gigajoule, and i have to convert it to m3
Can anybody help me with a formula?
Thank you.

You could look at posts #2 and #5 for method. Gigajoules rate the heat content of the gas. You either need a heat content per cubic meter from your gas supplier, or a chemical analysis of the gas, and heat content of the constituent gases to compute. There is no "master formula," it is a property of the particular gas.

I don't know the composition of "blast furnace gas" even on a "typical" basis.

Unregistered
11-01-2010, 12:34 PM
What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated

Unregistered
11-02-2010, 10:01 AM
what you are looking for is typically referred to as the HEAT VALUE of natural gas(I'm assuming its natural gas) this varies by the quality of the natural gas as you are converting energy to volume....a standard used in many districts is the following:
cubic metres to GJ = m3 x 0.03769
thus 500m3 of gas consumed would equal 18.845 approx GJ
18.845 GJ to m3 = 18.845 / 0.03769 = 500m3

Unregistered
12-24-2010, 02:43 AM
anyone done the conversion for gas to electricity via fuel cell at say 60% efficiency ?

Unregistered
11-23-2011, 06:19 PM
what is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated

please convert 116.52 gj to cubic metres or kilos

JohnS
11-24-2011, 02:33 AM
please convert 116.52 gj to cubic metres or kilos

While natural gas is "mostly" methane, the trace gases affect heat content so it varies well to well. A Dept. of Energy table gives 52.225 GJ/kg as a typical value (HHV), but it can vary several percent. 116.52 GJ x 1 kg/52.225 GJ = 2.2 kg. Unless you know the heat content for your particular gas source, additional precision is unwarranted.

Unregistered
06-24-2012, 03:57 PM
What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated

1m3 natural gas to mjoules