virgin_argon_scfm, p_800_scfm, p_800_802_scfm, virgin_flow_to_customer

p_800_scfm is the flow rate of liquid argon through the pumps to the ARS back end. Each pump at each site has a maximum flow rate as documented on a site by site basis. When operational each pump also has a frequencey output tag VFD_800X_FREQ_OUT. To calculate the pump flow rate, the maximum rate for a pump is multiplied by (VFD_800X_FREQ_OUT/60).

p_800_802_scfm sums the liquid flow rate being pumped by the pumps with the estimated flow through the 802 valves XV_802. The method detailing how xv_802_scfm is calculated is detailed elsewhere.

virgin_argon_scm calculates flow of virgin argon from TK_1100 through the pumps. When TK700 outlet valve XV_703 is shut and liquid virgin tank outlet valve XV_1123 is open it is assumed the virgin argon flow rate is equal to the flow rate of gas through the pump p_800_802_scfm

virgin_flow_to_customer calculates flow of virgin argon from TK_1100 through the pumps. When TK700 outlet valve XV_703 is shut and liquid virgin tank outlet valve XV_1123 is open it is assumed the virgin argon flow rate is equal to the flow rate of gas through the pump ft_1002

formula

p_800_scfm = (pump_a * VFD_800A_FREQ_OUT + pump_b * VFD_800B_FREQ_OUT + pump_c * VFD_800C_FREQ_OUT + pump_d * VFD_800D_FREQ_OUT) / 60.0

p_800_802_scfm = p_800_scfm + sv802Total

virgin_argon_scfm = p_800_802_scfm if XV_703_OUT == 0 && XV_1123_OUT > 0

virgin_flow_to_customer = ft_1002 if XV_703_OUT == 0 && XV_1123_OUT > 0

where:

• sv802Total = PumpA/B/C/D * flow_rate(site) if sv802(a/b/c/d)Out.isOpen && xv801(a/b/c/d)Out.isOpen

Max flow

Site	Pump A	Pump B	Pump C	Pump D
ARS14002	600	600	600	600
ARS16006	1200	1200	1200	1200
ARS16005	1500	1500
ARS13007	1500	1500	3000
ARS15002	600	600	600
ARS15008	1500	1500
ARS19004	1200	1200	600	600
ARS20009	1200	1200	600	600

flow_rate

Site	flow-rate
ARS14002	0.03
ARS13007	1.0
ARS15002	1.0
ARS15008	1.0
Other	0.13