Visit the Energy Systems Laboratory Homepage.
CCLEP Retrofit and Innovative Controls to Achieve 56% Energy Savings for a Luxury Shopping Mall
MetadataShow full item record
The Continuous Commissioning Leading Project (CCLEP) process is an ongoing process to apply Continuous Commissioning (CC) system optimization theory and advanced technologies in commercial retrofit projects. The CCLEP process was applied to a luxury shopping mall and office building from May 2006 to February 2007. The CCLEP process integrates the Air-Handling Unit (AHU), terminal boxes and central plant as a whole system with retrofit and optimal control strategies. The case study building has ten single fan dual-duct VAV AHUs, 123 dual-duct pneumatic controller pressure independent terminal boxes, and a central heating and cooling plant. Major retrofit efforts include upgrading from pneumatic to DDC controls for all AHUs, installing main hot deck dampers, replacing the boiler, installing VFD on fans and pumps, and installing a Fan Airflow Station (FAS) and Pump Waterflow Station (PWS). This paper presents both the existing and the optimal control schedules, which include static pressure reset integrated with FAS, improved outside air control, supply air temperature reset, retrofit recommendations and optimal control for terminal boxes, and a Pump Waterflow Station (PWS) to improve chilled water pump speed control and ensure minimum water flow requirements for the evaporator. The measured hourly utility data after installation of the optimal control schedules, including the control upgrade period, show that annual HVAC electricity consumption is reduced by 56.2% and gas use is reduced by 36%.
Wu, L.; Pang, X.; Liu, M.; Wang, J.; Lewis, T. G. (2007). CCLEP Retrofit and Innovative Controls to Achieve 56% Energy Savings for a Luxury Shopping Mall. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from