US 11,835,250 B2
Method and a system for performing calibration of variable air volume (VAV) units
Rohan Ajinkya Mehta, Telangana (IN)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Dec. 7, 2020, as Appl. No. 17/113,597.
Claims priority of application No. 202011001032 (IN), filed on Jan. 9, 2020.
Prior Publication US 2021/0215379 A1, Jul. 15, 2021
Int. Cl. F24F 11/77 (2018.01); F24F 3/044 (2006.01); F24F 140/40 (2018.01); F24F 110/30 (2018.01)
CPC F24F 11/77 (2018.01) [F24F 3/0442 (2013.01); F24F 2110/30 (2018.01); F24F 2140/40 (2018.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an air handling unit connected to one or more supply ducts and the one or more supply ducts connected to a plurality of variable air volume (VAV) units; and
a calibration unit configured to:
turn off a fan of the air handling unit and initiate zero flow balancing for each of the plurality of variable air volume (VAV) units;
calibrate one or more airflow sensors associated with one or more reference variable air volume (VAV) units of the plurality of variable air volume (VAV) units using a step measure technique or using a value of airflow of the one or more supply ducts measured by an airflow sensor of the air handling unit or by an airflow sensor in the one or more supply ducts;
determine a reference airflow value of the one or more reference variable air volume (VAV) units; and
calibrate other airflow sensors associated with other variable air volume (VAV) units of the plurality of variable air volume (VAV) units based on the reference airflow value of the one or more reference variable air volume (VAV) units.