US 12,264,785 B2
Gas control system and method with bracketed deadband
Vladimir Rimboym, Highland Park, IL (US); and James M. Garvey, Glen Ellyn, IL (US)
Assigned to VRG Controls LLC, Lake Zurich, IL (US)
Filed by VRG Controls LLC, Lake Zurich, IL (US)
Filed on Jun. 2, 2022, as Appl. No. 17/805,152.
Prior Publication US 2023/0392756 A1, Dec. 7, 2023
Int. Cl. F17D 1/02 (2006.01); F17D 3/01 (2006.01); F17D 3/18 (2006.01); G05D 7/06 (2006.01)
CPC F17D 1/02 (2013.01) [F17D 3/01 (2013.01); F17D 3/18 (2013.01); G05D 7/0623 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for controlling gas supply to a facility through a gas supply line having a primary run and a trim run, wherein total flow capacity through the primary run and trim run to the facility is defined by CX, which is the total flow capacity of the primary run (CP) plus the total flow capacity of the trim run (CT), and an actual gas flow to the facility is defined by FX, which is the actual flow of the primary run (FP) plus the actual flow of the trim run (FT) and wherein FX is less than CX, CT is less than CP and FX is either stable, increasing, or decreasing based on a demand from the facility, the method comprising:
supplying gas to the facility wherein FX=FT when FX is less than or equal to CT;
supplying gas to the facility wherein FX=FP+CT when FX is increasing and greater than CT;
supplying gas to the facility wherein FX=FP+FT when FX is stable and greater than CT; and
supplying gas to the facility wherein FX=FP when FX is decreasing and greater than CT.