tk_700_scf, tk_700_lbs

Tank TK700 content scf/lbs.

Metric uses the height of liquid in TK700 as per PDT_701_ALT to determine the SCF of liquid and gaseous argon in the vessel, and then computes the total argon SCF.

The liquid volume in in3 is calculated by assuming the liquid volume is that of a cylinder, with standard tank diameter and a height as per PDT_701_ALT. PDT_701_ALT is in inches of H2O, so a conversion factor function argon_in is applied to convert it to inches of argon.

The gas headspace in TK700 is computed by subtracting the liquid volume from the max empty capacity/volume of TK700. The mass of argon in the headspace is then calculated by determining the density using the heaspace pressure PT_701 and the ar_density function. Mutiplying the headspace volume by the density yields a mass of gas in lbs.

Finally the volume of liquid is converted to SCF of argon using the scf function, and the mass of gas is also converted to SCF of argon by using the scf funcion which applies a standard conversion factor. These two values are then summed.

pre-calculation

• liquid_in3 = cylinder_vol(argon_in(PDT_701_ALT), 59.25)
• gas_lb = ar_density(PT_701) * ft3(454967.9 - liquid_in3)

formula

• tk_700_scf = scf(liquid_in3) + scf(gas_lb)
• tk_700_lbs = lbs(tk_700_scf)

59.25 is tank diameter [in]

454967.9 tank capacity [in3]

Site specific behavior

• ARS19004: check description of the method at github issue
• HRS18006: tk_700_scf = scf(density_he(PT701A) * 3542.5347) where 3542.5347 is empty vessel size in ft3