Honeywell International Inc.
SYSTEMS AND METHODS FOR CHARACTERIZING VARIABLE-AIR-VOLUME (VAV) VALVES FOR USE IN HVAC SYSTEMS

Abstract:

An HVAC system and method for characterizing a chosen VAV valve involves measuring the valve's volumetric flow rate versus valve position at just one or at some other limited number of data points and comparing that to the average characteristics a rather large group of similar valves. A custom characterization of airflow versus valve position for the chosen VAV valve is then created based on a difference between the characteristics of the chosen valve and that of the group of valves. In some examples, the VAV valve is of a venturi style such that a generic characterization of the group of valves is substantially linear when their flow rates are expressed logarithmically.