4 replies to this topic

[LizbethR14]

Hello,

 

I'd like to determine natural gas volume at different pressures.  The purpose is for storage in a tank.

I'd thank you a lot!

Edited by Art Montemayor, 26 February 2018 - 11:07 AM.
Spelling

[breizh]

Hi Lizbeth ,

Can you provide a sketch and explain a bit more about the process ?

What about P*V=Z*R*T ?

hope this helps.

Breizh

Edited by breizh, 26 February 2018 - 05:18 AM.

[Bobby Strain]

One doesn't store natural gas in a tank. Unless it is liquefied. Or the pressure is elevate to 2000 to 3000 psi as in a CNG powered vehicle. Thus your query is puzzling. If it is CNG, you should find lots of information on the web.

 

Bobby

Edited by Bobby Strain, 26 February 2018 - 10:18 AM.

[Art Montemayor]

Lizbeth:

 

Before taking this query further, please answer some basic questions:

1. Are you a layperson, student, or practicing engineer?  This thread is not process simulation related, so I have to move it.
2. Are you dealing with a CNG (Compressed Natural Gas) cylinder - as Bobby has indicated?
3. Are you trying to find the volumetric content of a specific, already-fabricated vessel?  If so - what size, pressure, and temperature rating does it have?  I filled a lot of compressed gas cylinders while managing gas plants in Peru over 52 years ago, and one way to control the amount of cylinder content was by weight.  This may or may not apply to your query.
4. Or are you trying to find the size of a pressure vessel that could safely contain a specific quantity of natural gas?  If so, what are the temperature, pressure, and composition of the stored natural gas?  The composition of the natural gas is important.

Please respond so that I can determine what Forum this thread belongs in and our members can respond with help or recommendations.

[LizbethR14]

Thank  you for answer me, I am a process trainee engineer from Peru, so I'd like to determinate how much Natural Gas in MSCF can be storage in a pipe of 10000m with 6" of diameter and SC 40, I've just determine the flow fluid by Weymouth equation for different pressure , from 270 psi to 500 psi, the pipe is too old so I don't have and exactly specification about it related to pressure rating but the initial pressure is usually 300 psi and the last is 260 psi.

I followed the next steps:

•    The composition is for dry natural  gas ( 97% Methane and 5% Ethane).
•    FlowTemperature: 80°F 
•    Temperature and Pressure base (90°F/14,7 psi)
•    Weymouth equation was applied for different pressure and calculate flow fluid (MFSCD)
• I can't define what's the volume exactly as pipe so I think that I can to determine by a pressure tank, I have a case where the flow fluid is 11MMSCFD but It's just filled in 6hour and is 2MMSCFD aprox.
• If there is some standar or calculation memory for it I'd like you to share me, thank you!