CCLLC supported Pepco Energy Services in the Investment Grade Audit (IGA) for the Naval Air Station–Pensacola (NASP) in Florida. CCLLC combined onsite surveys, sequence reviews, and engineering analysis to identify building requirements, HVAC system deficiencies, Continuous Commissioning® optimization measures, and other energy conservation measures (ECMs) impacting HVAC system performance. Site surveys during the IGA phase are intended to collect information including but not limited to building usage, occupancy requirements, installed equipment configuration and condition, BAS capability, and operational challenges.
The energy savings potential from applying the Continuous Commissioning® process at each building was analyzed using models configured to calculate the annual utility cost savings of modifying the existing mechanical equipment operation. The difference in energy consumption was estimated based on application of conservative performance enhancing control strategies to the as-found control sequences at each building, for each system. This analysis was coordinated with Pepco by utilizing their record of installed equipment and identifying other project ECMs that impact HVAC system performance. This approach ensured consistent use of equipment performance data across the project as well as modeled control strategies based on final HVAC system configuration.
The Continuous Commissioning® process included managing the commissioning issues log, establishing a project-wide trend monitoring program, preparing detailed implementation building submittals to document baseline conditions and recommended sequence strategies and setpoints, overseeing controls vendor responsible for implementing control sequence and hardware modifications, and performing ongoing performance verification. Approximate stats included 975 measures across 29 buildings impacting 15 chilled water plants, 30 heating water plants, 175 AHUs, and 4,000 terminal units.
