Flow Conversion (what is 36.732)
Flow Conversion (what is 36.732)
(OP)
There is a constant of 36.732 in an equation that we are unable to figure out. It is to convert raw natural gas flow in KACFH to a pressure /temp compensated KSCFH.
36.732*raw flow*(pressure+14.7)/(temp F+459.7)
Thanks for your help.
36.732*raw flow*(pressure+14.7)/(temp F+459.7)
Thanks for your help.





RE: Flow Conversion (what is 36.732)
RE: Flow Conversion (what is 36.732)
It seems Zoobie is right. The formula may contain a correction to account for the "actual" compressibility factor of the gas.
RE: Flow Conversion (what is 36.732)
The most important lesson to learn from this exercise is that there is nothing standard about "standard" conditions. The reference conditions must always be specified, whether you call them "standard" or "normal".
JBrady - I hope you can come back and confirm whether the reference temperature (probably specified in your supply contract) was indeed 80F.
RE: Flow Conversion (what is 36.732)
A conversion from actual (a) volume to standard (s) volume would be as follows:
Where,
P = pressure
T = absolute temperature
Z = compressibility factor
For ideal gases Zs/Za = 1
For real gases Zs/Za ≠ 1
RE: Flow Conversion (what is 36.732)
SCF = ACF x [Pa-(Psata x RHa)]/Ps x Ts/Ta x Zs/Za
PS: SCF corresponds to 0%RH
Happy Independence Day to all fellow Indians
RE: Flow Conversion (what is 36.732)
I thought the original query referred to natural gas.
RE: Flow Conversion (what is 36.732)
RE: Flow Conversion (what is 36.732)
RE: Flow Conversion (what is 36.732)
RE: Flow Conversion (what is 36.732)
As an example: natural gas is sold per unit of energy (GJ). Natural gas is usually metered in standard cubic feet or cubic meters. To get from one to the other (volume to energy) the gas heating value per unit volume is used. As far as I know all of the constituents of the gas go into the calculation of the heating value. This would seem to create a disconnect with the equation you provided if applied to natural gas. Perhaps the affect of moisture is small but I wonder what it would be applied to a billion cubic feet of gas sold at $9/GJ. Again maybe its negligible....oh well I suppose I should get back to work.
RE: Flow Conversion (what is 36.732)
RE: Flow Conversion (what is 36.732)
The point that what I was trying to get at was that I believe its correct that when quoting a 'standard cubic whatever' of natural gas that this represents all of the moles in that gas expressed as a volume at standard T&P. Perhaps a better example is this: If you have a certain flow of gas expressed at standard conditions entering a dehydrator (glycol for arguements sake) then you would expect that the dry gas out would have a lower gas flow expressed at standard conditions (due to the moles of water absorbed by the glycol). Is this wrong? If so then I need to make some adjustments in how I do my calculations.