Using the power usage effectiveness (PUE) metric as a basis of comparison, Lawrence says the 2.3 to 2.7 ratings common not so long ago are being replaced in new builds by PUE measures of 1.2 or so. PUE, as determined by The Green Grid industry consortium, is the ratio of the total power going into a data center to the power used by the IT equipment there.
"So for every watt of IT load they're now using 0.2 watts vs. the whole watt used before. That'd be about an 80% reduction - that's not to say that's an average, but it is achievable," he adds.
In their own words:
"Being in the Northeast, these cooling units draw the cold outside air during the winter months, reducing the need for compressors to run to cool heated indoor air. This reduces electrical use and saves on wear and tear to the compressors."
Physical infrastructure management
People's picks: APC InfraStruXure Central, APC NetBotz Rack Monitor 550, Schneider Electric PowerLogic
What makes it green: With the real-time monitoring provided via physical infrastructure management, enterprise data center managers should have an easier time keeping tabs on power, cooling and environmental systems. This, in turn, should facilitate the ability to optimize for efficiency.
"We have smart systems, we have dumb systems, like thermometers and humidistats, and we have something in between," says Doherty of OMS in Your Data Center. "The smart systems are complete software systems that may manage your computer room for you based on predetermined metrics, and those are starting to evolve quite efficiently and successfully."
That's a good thing, Doherty adds.
"We always thought controls on the CRAC units and the computer room air handling systems managed the facility well. That's a thing of the past," he says. "We need more help. We need to be more proactive. ... And if we ever want unmanned facilities, we've got to have centralized management systems that we can access 24/7 from the Web."
In their own words:
"These devices allow real-time monitoring of the temperature and humidity levels throughout the data centers. With the ability to set operating parameters on the devices, we have tied the sensors into our trouble-ticket system and can receive instant notification of any abnormal readings. Likewise based on the real-time readings we are able to make 'set point' adjustments to our HVAC units to perform at optimum levels."
"It's ensuring our environment is continuously optimized for high-quality services at minimal costs for power and cooling.''
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