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Unit Conversion


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#1 ChrisHughes

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Posted 19 November 2019 - 08:15 AM

Hello,

 

Natural Gas from the mass balance is in kg/hr, but I need to convert it to metres cubed at STP (reference not given).

 

How do I do this?



#2 Bobby Strain

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Posted 19 November 2019 - 10:29 AM

It's not possible without knowing the molecular weight.

 

Bobby



#3 MrShorty

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Posted 19 November 2019 - 11:08 AM

In my experience with the gas industry, it seems that -- at STP (whatever that is) -- they just assume ideal gas at STP to convert from mass to volume. As Bobby indicates, this means first converting from mass to mole, but should otherwise be a straightforward calculation. Can we assume you are familiar with the ideal gas law (or other preferred EOS if your group doesn't want to assume ideal gas)?



#4 breizh

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Posted 20 November 2019 - 04:25 AM

Hi,

Define the standard condition , get the composition of your gas to calculate its molecular weight .

-If you assume its an ideal gas (Z=1)  , calculate the density thus the volumetric flowrate .

-You may want to use an EOS to calculate Z , then the density ,etc .

 

https://www.e-educat...520/m18_p4.html

 

https://checalc.com/...aturalgasZ.html

 

my 2 cents

Breizh


Edited by breizh, 20 November 2019 - 09:09 AM.





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