describe metrics formula with cavets description
virgin_buffer_scf
Buffer tank (TK_1000_SCF) content scf calculation for ARS13007 site.
The argon volume in a tank at a site at any point in time is dependent on the empty vessel volume, and the density of the gas.
The density of the gas is dependent on the pressure and temperature of the argon, PT_922 and TE_1021 are used with a density function to determine the density at the TK_1000_SCF operating conditions
Multiplying density by TK_1000_SCF empty volume yields a mass of argon in TK1000 in lbs, so a standard density factor is also applied to yield a gas volume in SCF of argon.
densityFor = Density at given pressure and temperature
bufferVolume = 694 ft3 (ARS13007) bufferVolume = 600 ft3 (All other sites)
densityFor(psig, temp) * bufferVolume / standardDensityLbFt3
standardDensityLbFt3
depends on gas type