Server liquid cooling with chiller-less data center design to enable significant energy savings

Iyengar, Madhusudan; David, Milnes P.; Parida, Pritish R.; Kamath, Vinod; Kochuparambil, Bejoy; Graybill, David; Schultz, Mark; Gaynes, Michael; Simons, R.E.; Schmidt, Roger; Chainer, Timothy

doi:10.1109/stherm.2012.6188851

Cited by 72 publications

(33 citation statements)

References 3 publications

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“…The high temperature of return water provide high quality waste heat and high energy recovery efficiency, that means the need for chillers can be eliminated by recovered heat, thus reduce the energy consumption. According to a recent case [40], a DC equipped with water-cooled system to cooling the processor and memory, using circulated air to cooling the other components. The internal water loop brings to external coolant loop by heat exchanger, and eventually transfer to external air by a dry-cooler.…”

Section: Water-cooled System and Two-phase Cooled Systemmentioning

confidence: 99%

A study on the effect of ground surface boundary conditions in modelling shallow ground heat exchangers

Bortoloni¹,

Bottarelli²,

2017

Applied Thermal Engineering

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Section: Water-cooled System and Two-phase Cooled Systemmentioning

confidence: 99%

A study on the effect of ground surface boundary conditions in modelling shallow ground heat exchangers

Bortoloni¹,

Bottarelli²,

2017

Applied Thermal Engineering

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“…Investigation of chiller-less cooling technology of datacenters has been conducted intensively [29], [32], [34]. A liquid-cooled server with an economizer based system was used to better understand the sectors of power through the datacenter.…”

Section: Related Workmentioning

confidence: 99%

A unified model for holistic power usage in cloud datacenter servers

Garraghan

Al-Anii

Summers

et al. 2016

Proceedings of the 9th International Conference on Utility and Cloud Computing

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eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract -Cloud datacenters are compute facilities formed by hundreds and thousands of heterogeneous servers requiring significant power requirements to operate effectively. Servers are composed by multiple interacting sub-systems including applications, microelectronic processors, and cooling which reflect their respective power profiles via different parameters. What is presently unknown is how to accurately model the holistic power usage of the entire server when including all these sub-systems together. This becomes increasingly challenging when considering diverse utilization patterns, server hardware characteristics, air and liquid cooling techniques, and importantly quantifying the non-electrical energy cost imposed by cooling operation. Such a challenge arises due to the need for multi-disciplinary expertise required to study server operation holistically. This work provides a unified model for capturing holistic power usage within Cloud datacenter servers. Constructed through controlled laboratory experiments, the model captures the relationship of server power usage between software, hardware, and cooling agnostic of architecture and cooling type (air and liquid). An exciting prospect is the ability to quantify the amount of non-electrical power consumed through cooling, allowing for more realistic and accurate server power profiles. This work represents the first empirically supported analysis and modeling of holistic power usage for Cloud datacenter servers, and bridges a significant gap between computer science and mechanical engineering research. Model validation through experiments demonstrates an average standard error of 3% for server power usage within both air and liquid cooled environments.Keywords-Cloud datacenter, holistic energy, server power modeling.I.

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“…• F) to eliminate or reduce the need for mechanical cooling (chillers), described briefly in [10,11]. Although the data center community has become conditioned to think of temperatures between 60 and 75 degrees as the proper climate for a server room, there are many ways to keep equipment running smoothly with cooling technologies featuring significantly higher temperatures.…”

Section: Need For Liquid Coolingmentioning

confidence: 99%