The upgrade project involved replacing three single-stage centrifugal chillers ranging in age from 18 to 30 years and totaling 3,300 tons of capacity. According to Baran, the reasons for replacement were a desire for greater efficiency, concern about the R-11, -12 and -114 refrigerants used in the old machines, and an increasing concern about unit reliability because of age.
Another important part of the upgrade was the installation of a system-wide Tracer Summit?control system. This allows optimization of the chiller plant and distribution system, and provides an opportunity to observe system conditions from the chiller plant control room or from remote locations.
According to Baran, the system flexibility allows him to quickly respond to changing energy prices or supply conditions. He added, “The system performs like a champ.”
Publication date: 07/29/2002