Total LPG Mass in tank
Total LPG Mass in tank
(OP)
How do i go about calculating the total mass of LPG (mixture butane-propane)in a tank which contains both liquid and gas phases.
Given data are: Total tank volume, liquid level, total pressure and tank temperature.
Any input will be appreciated.
Harry
Given data are: Total tank volume, liquid level, total pressure and tank temperature.
Any input will be appreciated.
Harry





RE: Total LPG Mass in tank
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Find the densities of propane and butane liquid at the same temperature and pressure and multiply each by the percentage in the mix.
If the level was relatively high, I'd tend to just ignore the mass of the gas phase.
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RE: Total LPG Mass in tank
If you are after the gas and liquid compositions, then a bubble point calculation using K values may be of help.
See also thread135-111334: Propane/Butane vaporization calculation.
RE: Total LPG Mass in tank
Or use Raoult's law since the negative deviations would be minor.
RE: Total LPG Mass in tank
((LIQUID sggr -((temp-60) * .0015)) * 62.4 * % tank liquid level * + (100%- % liquid level) * Vapor SPGR *.0765 * Press in absolute/14.696 * 520/ temp absolute) * volume in Ft^3
RE: Total LPG Mass in tank
What are: sggr and spgr
I see that the equation is not temp consistent. Both F and R are used. Is this correct?
Is volume (last term in equation) the tank volume?
Harry
RE: Total LPG Mass in tank