Comprehensive Data Center efficiency Treatment
OpTerra performed a comprehensive energy analysis for Harvard Pilgrim Health Care in Quincy, MA
Harvard Pilgrim’s data center in Quincy, MA is split between a raised floor area of approximately 2,500 sq. ft. and a solid floor area of around 1,500 sq. ft. OpTerra performed several upgrades to make the air distribution in the room as efficient as possible.
Elimination of cold and hot air streams mixing together was solved by the installation of blanking panels and air dams. Since the control room of the data center was also situated above the same raised floor plenum that is used for cold air supply, it was walled off to increase the pressure and thermal efficiency under the floor.
OpTerra then installed floor panels with high efficiency variable speed fans to more effectively supply air to the racks. The floor panels’ fans respond to temperature sensors in the racks to provide as much cooling as needed for that particular zone’s equipment.
A return air ducting system with thermostatically controlled air movers was also installed to pull air from the hot aisles directly to the CRACs. In the solid floor room, thermostatically controlled overhead air movers were installed to pull cold air to different parts of the room as needed. These improvements allowed for one CRAC unit in each room to be turned off and left in hot standby.
OpTerra also installed a central control system to manage the CRAC units, floor panels, overhead air movers and temperature sensors in the rooms. This system allows the data center managers a way to look at various real-time data from the rooms, including temperatures in the cold aisles, fan speeds, status of equipment as well as alerting them via email of any thermal issues in the room. In addition, the system responds to severe temperature changes in zones or CRAC failures by automatically turning on additional CRACs and adjusting the speed of the fans to help the particular zone in trouble. Efficiency measures designed and installed by OpTerra saved Harvard Pilgrim over $80,000 a year in data center energy costs, as well as qualifying them for over $90,000 in utility incentives.