Using Bulls-Eye Commissioning to Save Energy in Commercial Buildings

Abstract

Building system commissioning comes highly recommended by energy efficiency experts; however, it is rarely undertaken due to the cost and care needed to do a comprehensive job. Many existing utility meters provide whole-building 15-minute interval data that can be used to pinpoint fan control and HVAC schedule problems. Bulls-eye commissioning uses interval metering to focus detailed commissioning efforts. This paper concentrates on a single customer and how bulls-eye commissioning can be applied to focus the commissioning process. Significant energy savings were found by using interval data in conjunction with outside air temperature to isolate problems with schedules and in the economizer controls. Evaluation of main meter profiles allows detailed commissioning work to be better focused and more effective without the wait and expense of full commissioning services. Bulls-eye commissioning can be applied on its own or can be coordinated with traditional commissioning. In either case, the main meter profile shows what will directly impact total energy use and the customer's bill.