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#1 Matteo Giorgio Marrano

Matteo Giorgio Marrano

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Posted 01 October 2009 - 02:38 AM

Goodmorning,
i have a process data sheet in my hand for a cyclone scrubber for natural gas.
Attached are the physical properties of the gas written in the datasheet:

Well, i've tried to convert the 36.67 MMSCMD (million standard cubic meters per day) in order to obtain the equivalent kg as indicated in datasheet but something doesn't give me the exact number, can you tell me what is wrong?
This is my calculation:
Note:
- P0 and T0 are respectively 1 bar and 0°C(273.15 K) – Normal Condition (I prefere to work with normal cubic meters)
- Normal Cubic meter: 1.0561 Standard cubic meter

In this manner i have as result 1440000 kg/hr and not 1143600 kg/hr....

Where i was wrong?
Thanks
Matteo

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#2 Matteo Giorgio Marrano

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Posted 01 October 2009 - 02:44 AM

I attached a wrong file (the pdf one, please delete it..
These are the physical properties of the gas written in datasheet.

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#3 breizh

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Posted 01 October 2009 - 04:26 AM

Hi Matteo,
Let you download UCONEER from website and click on the blower (right corner) .
It will help you to solve your query and many more.
Regards
Breizh

#4 daryon

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Posted 01 October 2009 - 08:38 AM

Hi Matteo,

I think the problem might be related to the gas compressibiltiy (Z factor). The compressibilty for the gas will be different at standard conditions (closer to unity) than at actual conditions. You need to multiply by the gas compressibilty, if the value is approx. 0.9 at actual conditions then the by my calculations i get 1,143,600 kg/h. See attached spreadsheet (please forgive crudeness its was done quickly).

Attached File  Mass flow calc.xls   18.5KB   193 downloads

Edited by daryon, 01 October 2009 - 08:50 AM.


#5 breizh

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Posted 02 October 2009 - 02:27 AM

Hi Matteo ,
Using UCONEER , I got 1.1438E6 kg/h , (standard condition 60F,14.7 PSIa )
regards
Breizh

#6 joerd

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Posted 05 October 2009 - 08:46 AM

Note:
- P0 and T0 are respectively 1 bar and 0°C(273.15 K) – Normal Condition (I prefere to work with normal cubic meters)
- Normal Cubic meter: 1.0561 Standard cubic meter


It looks like you have it backwards:
1 Standard cubic meter (at 60 F, 14.7 psia = 15.56 C, 1 atm) = 1.0561 Normal cubic meter (at 0 C, 1 atm).




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