HP ML150 Optimizing facility operation in high density data center environment - Page 24

In Figure 19, the 102-kW row and the 182-kW row have been repositioned to better distribute the heat load. This CFD model shows that the CRAC units are now provisioned within 15 percent of their capacity. Figure 19. Statically provisioned CRAC units Dynamic Smart Cooling Dynamic Smart Cooling (DSC) is a datacenter cooling solution which progresses the state-of-the-art beyond that which is feasible with any static solution. Static solutions lead to over-provisioning of resources due to the need to respond to peak demands, handle installation growth of the IT load and maintain sufficient levels of redundancy. Likewise, inadequate control leads to providing server inlet air at a temperature far below the required temperature, which leads to wasted capacity. Employing DSC in a data center requires a distributed monitoring system and a feedback control system that continually provisions the cooling resources based on the workload distribution.12 DSC is currently available for retrofit in existing datacenters or can be easily specified as part of new construction. It is important to emphasize that the intelligent control comprising DSC is not a replacement for best practices in the datacenter. Rather, employing DSC in conjunction with the guidance provided in this paper will maximize potential benefits in the datacenter. For more information on DSC, consult the "Data Center Cooling Strategies" technical brief available at http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01153741/c01153741.pdf. 12 Patel, C.D., Sharma, R.K, Bash, C.E., Beitelmal, A, Friedrich, R., "Smart Cooling of Data Centers," July 2003, IPACK2003-35059, Proceedings of IPACK03- International Electronics Packaging Technical Conference and Exhibition, Maui, Hawaii. 24