virgin_scf for HRS18006

This metric calculates the inventory in the virgin Helium gas tank at 18006. There is only high pressure gas and no liquid in the tank

To calculate the volume the density of the helium is calculated according to the pressure PT_1101A and this is multipled by the empty cylinder volume to get a mass of helium in lbs, which is converted to SCF.

The empty volume is 91.8 ft3 per tube * 8 tubes = 734.4 ft3.

formula

virgin_scf = scf(density_he(PT1101A) * 734.4)

The empty volume of virgin tank is 734.4 ft3