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#1
11-14-2008, 03:56 PM
 Unregistered Guest Posts: n/a
gj natural gas to m3 natural gas

What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated
#2
11-15-2008, 06:02 AM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,235 Rep Power: 18
Re: gj natural gas to m3 natural gas

Quote:
 Originally Posted by Unregistered 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.
#3
11-08-2009, 06:09 PM
 Unregistered Guest Posts: n/a
Re: gj natural gas to m3 natural gas

1000 = MJ/GJ
so if 1 cubic meter of NG = 38.3 MJ then 1000/38.3 @ 26.1 cubic meters / GJ
#4
04-25-2010, 10:17 AM
 Unregistered Guest Posts: n/a
Re: gj natural gas to m3 natural gas

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?

#5
04-25-2010, 10:30 AM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,235 Rep Power: 18
Re: gj natural gas to m3 natural gas

Quote:
 Originally Posted by Unregistered 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? Thank you in advance!
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.
#6
05-14-2010, 03:35 AM
 Unregistered Guest Posts: n/a
Re: gj blast furnace gas to m3 natural gas

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.
#7
05-14-2010, 04:14 AM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,235 Rep Power: 18
Re: gj blast furnace gas to m3 natural gas

Quote:
 Originally Posted by Unregistered 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.
#8
11-01-2010, 01:34 PM
 Unregistered Guest Posts: n/a
Re: gj natural gas to m3 natural gas

Quote:
 Originally Posted by Unregistered What is the correct formula for converting gj natural gas to cubic meters of natural gas. Any help is greatly appreciated
#9
11-02-2010, 11:01 AM
 Unregistered Guest Posts: n/a
Re: gj natural gas to m3 natural gas

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
#10
12-24-2010, 03:43 AM
 Unregistered Guest Posts: n/a
Re: natural gas to electricity via fuel cell

anyone done the conversion for gas to electricity via fuel cell at say 60% efficiency ?

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