Viability of Cryogenic Cooling to Reduce Processor Power Consumption

Author:

Nordlund Alec1,Harrison Matthew1,Gess Joshua1

Affiliation:

1. Oregon State University, 2000 SW Monroe Avenue, 204 Rogers Hall, Corvallis, OR 97331

Abstract

Abstract Through the application of cryogenic cooling via liquid nitrogen (LN2), the power consumption of a CPU was substantially reduced. Using a digitally controlled solenoid valve and an additively manufactured cold plate, the manual process of LN2 cooling was automated for precise control of cold plate temperature. The power consumption and frequency relationship of the processor were established across three different thermal solutions to demonstrate the effect of temperature on this relationship. It was found that power consumption of the processor decreased at lower temperatures due to a reduction in current leakage and the core voltage necessary for stable operation. This culminated in a reduction of up to 10.7% in processor power consumption for the automated solution and 21.5% for the manual LN2 solution when compared to the air-cooled baseline. Due to the binary nature of the solenoid valve used, flow rate was tuned via an in-line needle valve to increase thermal stability. It was found that for lower flow rates, approximately 5.0 g/s, temperatures oscillated within a range of ±11.5 °C while for higher flow rates of 10–12 g/s, generated amplitudes are as small as ±3.5 °C. Additionally, several tests measured the rate of LN2 consumption and found that the automated solution used 230%–280% more coolant than the manual thermal solution, implying there is room for improvement in the cold plate geometry, LN2 vapor exhaust design, and coolant delivery optimization.

Publisher

ASME International

Subject

Electrical and Electronic Engineering,Computer Science Applications,Mechanics of Materials,Electronic, Optical and Magnetic Materials

Reference40 articles.

1. Energy Efficiency Analyses and Comparison of Air and Water Cooled High Performance Servers,2009

2. The Merits of Open Bath Immersion Cooling of Datacom Equipment,2010

3. The Green Grid Power Efficiency Metrics; PUE and DCiE;Avelar, V., Azevedo, D., and French, A., The Green Grid,2007

4. Flow Rate and Inlet Temperature Considerations for Direct Immersion of a Single Server in Mineral Oil,2014

5. Temperature Aware Workload Management in Geo-Distributed Datacenters,2013

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3