0
research-article

The Performance Impact of Integrating Water Storage into a Chillerless Data Center Design

[+] Author and Article Information
Isaac Rose

Department of Mechanical Engineering, Villanova University, Villanova, Pennsylvania, USA, 19085
isaac.rose@m-r-d.com

Aaron P. Wemhoff

Department of Mechanical Engineering, Villanova University, Villanova, Pennsylvania, USA, 19085
aaron.wemhoff@villanova.edu

Dr. Amy Fleischer

Department of Mechanical Engineering, Villanova University, Villanova, Pennsylvania, USA, 19085
amy.fleischer@villanova.edu

1Corresponding author.

ASME doi:10.1115/1.4041804 History: Received December 20, 2017; Revised September 10, 2018

Abstract

A numerical model of a water storage system is developed, validated and used to analyze the impact of a water storage tank system in a chiller-less data center design. The results show that during times of high wet bulb operating conditions, a water storage tank can be an effective method to significantly reduce chip operating temperatures for warm-water cooled systems by reducing operating temperatures 5-7°C during the hottest part of the day.. The overall system performance was evaluated using both an exergy analysis and a modified PUE metric defined for the water storage system. This unique situation also necessitates the development of a new exergy definition in order to properly capture the physics of the situation. The impact of tank size, tank aspect ratio, fill percentage, and charging/discharging time on both the chip temperature and modified PUE are evaluated. It is determined that tank charging time must be carefully matched to environmental conditions in order to optimize impact. Interestingly, the water being stored is initially above ambient, but the overall system performance improves with lower water temperatures. Therefore, heat losses to ambient are found to beneficial to the overall system performance. The results of this analysis demonstrate that in application, data centers operators will see a clear performance benefit if water storage systems are used in conjunction with warm water cooling. This application can be extended to data center failure scenarios and could also lead to downsizing of equipment and a clear economic benefit.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In