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Current trends in data center cooling infrastructure design drive toward raising the coolant temperature to as high a level as equipment reliability allows in order to reduce the energy consumed by the cooling infrastructure and, consequently, improve (i.e., decrease) the power utilization effectiveness (PUE). However, as currently applied, PUE would appear to have deteriorated if measures are taken...
As part of a US Department of Energy cost shared grant, a liquid cooled chiller-less data center test facility was designed and constructed with the goal of reducing total cooling energy use to less than 5% of the total IT and facilities energy usage by utilizing warm water cooling of the electronic rack. A server compatible Liquid Metal Thermal Interface (LMTI) [1] was developed and integrated to...
We present results of modeling for the design of microgaps for the removal of high heat fluxes, i.e., 1 kW/cm2, at low wall temperature (∼ 85°C) via a strategy of very high mass flux (>1000 kg/m2s), high quality (outlet vapor mass quality >90%), two-phase forced convection. Modeling includes (1) thermodynamic analysis to obtain performance trends across a wide range of candidate coolants, (2)...
Despite many advances in electronics liquid cooling, air still remains one of the main means of cooling of high heat flux servers of datacenters. Regardless their long history of use, air-cooled blade servers continue to introduce strong nuisances that need to be considered during their implementation and operation, for instance: large energy consumption, difficult to manage the flow of air mastered...
Jet impingement cooling with phase change is a technique that has been successfully used to dissipate high heat fluxes (of order of 100 W/cm2 and higher) from advanced electronics. This work reports high speed visualization of jet impingement boiling on a copper heat spreader with porous coating. The coolant used in the experiments is a dielectric fluid, HFE-7100, in combination with a 5 × 5 array...
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