US 11,835,251 B2
Method and a system for operating an air handling unit at effective static pressure
Rohan Ajinkya Mehta, Telangana (IN); and Pratap Kumar DVS, Telangana (IN)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Nov. 24, 2021, as Appl. No. 17/534,755.
Claims priority of application No. 202011052896 (IN), filed on Dec. 4, 2020.
Prior Publication US 2022/0178578 A1, Jun. 9, 2022
Int. Cl. F24F 11/77 (2018.01); F24F 11/64 (2018.01); F24F 11/46 (2018.01); F24F 140/40 (2018.01); F24F 140/50 (2018.01); F24F 110/30 (2018.01); F24F 110/40 (2018.01)
CPC F24F 11/77 (2018.01) [F24F 11/46 (2018.01); F24F 11/64 (2018.01); F24F 2110/30 (2018.01); F24F 2110/40 (2018.01); F24F 2140/40 (2018.01); F24F 2140/50 (2018.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
receiving airflow setpoint values from each of a plurality of variable air volume (VAV) units to determine a combined airflow set point for the plurality of VAV units of an air handling unit (AHU);
determining an effective static pressure setpoint for the AHU based on a relation between the combined airflow setpoint value and a static pressure represented by a system effect curve;
operating the AHU at the effective static pressure setpoint;
monitoring, by the AHU, a damper position of each VAV unit for determining a starving VAV unit from the plurality of VAV units and computing the effective static pressure setpoint of the AHU based on a relation between the combined airflow setpoint value and a static pressure represented by a system effect curve;
determining, by the AHU, an offset for the starving VAV unit; and
adjusting, by the AHU, the offset to the effective static pressure setpoint of the AHU for the starving VAV unit.