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Energy Conservation at Verizon
Bluestone made several efficiency improvements to Verizon's 100,000 sq. ft. data center in Billerica, MA. Bluestone implemented passive air flow measures such as blanking panels and open top cold aisle containment to prevent cold supply air from mixing with hot air exhausted from servers. Thermostatically controlled fan trays were installed to help pull cold air from the raised floor plenum, reducing the need for high static pressure. A central control system with temperature sensors was installed to monitor the cold aisle, turning on backup units in the event of a thermal emergency. These air flow balancing measures allowed Verizon to shut off 37 of the 65 CRAC units operating.
Bluestone also made improvements to Verizon’s electrical room air flow. Three of the four 120-ton AAON rooftop units were running continuously, and the majority of the cold air was going directly back into the return of the units. Bluestone installed ductwork with diffusers to bring the cold supply air as close as possible to the UPS. VFDs and fully adjustable economizer motors were installed to vary the fan speed and take advantage of free cooling at much higher outside air temperatures. This resulted in running two units and utilizing 100% free cooling below 50 degrees Fahrenheit. Bluestone upgraded the existing 4-foot T-8 industrial fixtures to 25-watt lamps with high efficiency T-8 ballasts. Occupancy sensors were installed in less-traveled areas such as offices and rest rooms. The four existing lighting quadrants in the main data center space were divided into 12 mini-zones and integrated into the central control system, allowing for more efficient and granular control.
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© 2012 Bluestone Energy Services, LLC |
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