Typical of  many TES systems installed in Southern California, the TES system originally installed at Jamboree Center worked, but not quite as desired.  When the TES system was built, the utility incentive and rate structures heavily favored the use of partial storage systems, whereby the TES system took the place of the third chiller, and to meet the needs of the tenants, both chillers, plus the TES system had to be operated during the on-peak rate period.

A few years after the installation of the TES system was completed, the utility rate structure changed dramatically, and became geared heavily towards demand charges, which accounted for over half the utility bill. 

On hot or humid days, the existing TES system ran out of capacity at approximately 5:00 PM, one hour prior to the end of the peak rate period, thus much of the financial benefit of the TES system was being lost to demand charges, as the fan systems would ramp to full speed as they ran out of chilled water late in the day.

ROI was asked to evaluate the conversion of the partial storage system to a full storage system.  It was determined that it could be accomplished without increasing the tank capacity by  modifying the Sequences of operation, the TES tank header system and chiller plant piping systems.

ROI developed detailed bid documents, including new sequences of operation, new piping configurations in the chiller plant and new headers in the TES tank,  the project was awarded, and installed per the ROI drawings.

Several years of operating history have shown that the TES system capacity wa increased substantially. Even on humid, peak load days, neither chiller has to run between 30 minutes prior period to one hour after the peak period, eliminating approximately 1 MW from the grid.

Challenger Memorial Youth Center | 400/600 Corporate Point
Jamboree Center | McArther Court