Airflow management and energy saving potentials at a high-density data center with stepped-like server placement

Xiaolei Yuan*, Yumin Liang, Yiqun Pan, Risto Kosonen, Yu Wang

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

This paper proposed and introduced an innovative concept of step-like server placement in data centers (DCs), replacing the traditional servers placed on the same vertical plane with step-like server placement. The studied simplified DC model was established based on an actual operating DC. The feasibility and reliability of the simplified model was validated by on-site experimental results. This paper is analyzed two scenarios: the effects of horizontal spacings (0, 0.01, 0.02, 0.03, and 0.04 m) between adjacent servers and with the effect of different supply air temperatures (SATs) (22.5, 23, 23.5, and 24°C) on the rack hotspot. The results show that step-like server placement can effectively enhance the thermal distribution, while the optimum thermal distribution is achieved with the spacing of 0.01 m in case 2. Under this circumstance, the rack hotspot reduced by 2.5°C, while case 2 is selected for further analysis in scenario 2. In scenario 2, the thermal environment in cases 6–8 are totally better than that in case 1 in terms of rack hotspot and temperature distribution. Although there appears another moderate heat accumulation at the top-side, the overall thermal distribution in the case with SAT of 24°C is still better than that in original case. The electricity consumptions of the CRACs can be saved by approximately 146 and 195 kWhr/day with the most optimal configuration.

Original languageEnglish
Pages (from-to)1555-1567
Number of pages14
JournalInternational Journal of Green Energy
Volume19
Issue number14
Early online date21 Dec 2021
DOIs
Publication statusPublished - 14 Nov 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Data center
  • energy saving
  • rack-level airflow management
  • step-like server placement
  • temperature distribution
  • thermal environment

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