Trane TRG-TRC016-EN manual Heat Recovery

period four

Chiller-Plant Control

notes

Heat Recovery

standard electricchillers

preferentially-loaded heat-recovery chiller

Figure 96

The system might also benefit from having a heat-recovery chiller fully loaded. As discussed in Period Three, to maximize the amount of heat recovered, it is often desirable to preferentially load that chiller, sequencing it as a base chiller—“first on” and “last off.” Other chillers can then be turned on when the heat-recovery chiller cannot handle the cooling load alone.

A variation on this idea is an absorption chiller fueled by waste heat. It is preferentially loaded to handle as much of the cooling load as possible before turning on other chillers. The absorption chiller would be sequenced as a base chiller to make use of the free energy operating this chiller.

88 TRG-TRC016-EN