This complex is owned by the same company that owns Jamboree Center.  The project description is very similar to Jamboree Center, as the same basic TES design had been implemented at both sites.  After the proven success of the Jamboree Center conversion, the chiller plant at MacArthur Court was modified in the same fashion.

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 TES system ran out of capacity at approximately 4:30 PM, one and a half hours 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.

Based on our previous success with a similar retrofit at Jamboree Center for the same owner, 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 a set of bid documents, including new sequences of operation, new piping 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 was increased substantially. Even on peak load days, neither chiller has to run between 60 minutes prior to the peak period to approximately 2 hours after the peak period.  

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