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The paper summarizes part of a project that was undertaken to develop highly energy efficient warm liquid cooled servers for use in chiller-less data centers that could save significant data center energy use and reduce data center refrigerant and make up water usage. One of the key concepts developed as part of this project is the Dual-Enclosure-Liquid-Cooling (DELC), which comprises of a 100% liquid...
This paper focuses on alternative highly energy-efficient data center configurations with air-cooled servers that eliminate the use of chillers. In the first method, outdoor air is directly pumped through one side of an indirect air-to-air heat exchanger with air flow through the other side being passed through the data center to cool the air-cooled server racks. This method is called Indirect Air...
The current trend in microelectronic systems has made thermal management a critical design phase with the increase in the number of transistors per chip and decrease in system footprint. For high end systems, it has become increasingly difficult to rely on air cooling. As a result, liquid cooling has grown in prominence as a method for cooling high density interconnect (HDI) devices. Water cooling...
This paper summarizes the concept design and hardware build efforts as part of a US Department of Energy cost shared grant, two year project (2010–2012) that was undertaken to develop highly energy efficient, warm liquid cooled servers for use in chiller-less data centers. Significant savings are expected in data center energy, refrigerant and make up water use. The technologies being developed include...
Understanding and improving the thermal management and energy efficiency of data center cooling systems is of growing importance from a cost and sustainability perspective. Toward this goal, warm liquid cooled servers were developed to enable highly energy efficient chiller-less data centers that utilize only “free” ambient environment cooling. This approach greatly reduces cooling energy use, and...
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