Variable Speed Drive Volumetric Tracking (VSDVT) for Airflow Control in Variable Air Volume (VAV) Systems

摘要

An airflow control method has been developedfor variable air volume (VAV) systems. This airflowcontrol method is named VSD volumetric tracking(VSDVT) since both the supply and return airflowsare determined using signals of the variable speeddrives (VSD) instead of the flow stations. Itsperformance is studied and compared with the fantracking (FT) method using model simulations. TheVSDVT maintains a constant building pressure andthe required outside airflow under all load conditions,reduces the annual return air fan energy by up to50%, and the annual supply air fan energy by up to30%. This paper presents the VSDVT method, thesystem models, and the simulation results.