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Design and optimization of an air-based phase change cold storage unit through cascaded construction for emergency cooling in IDC

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  • Zheng, Ziao
  • Huang, Bin
  • Lu, Gaofeng
  • Zhai, Xiaoqiang

Abstract

This paper proposed an air-based phase change cold storage (APCCS) unit for emergency cooling in Internet Data Center (IDC). Firstly, the self-developed phase change material (PCM) applicable to IDC cooling was prepared. Then, experiments including both charging and discharging process of the APCCS unit were carried out. Next, a numerical model was developed to evaluate the thermal performance during the discharging process for emergency cooling and was validated with experimental results. Further, a cascaded arrangement of PCM from one to five stages was constructed and optimized based on exergy analysis. The results demonstrated that the average exergy efficiency has increased by 7.8% together with an increase of 19 kJ on exergy from single stage to five stages. In addition, heat transfer optimization was performed by rearranging the (PCM) containers from in-line to staggered form. A four-stage staggered arrangement outperformed the single-stage unit in terms of an increase of 25 kJ on exergy as well as nearly 10% on average exergy efficiency. Meanwhile, the discharging rate for the four-stage staggered unit could be maintained above 2.5 kW for 30 min, providing enough cooling capacity for a typical cabinet with 10 2U servers (intel M70KLP4S2UHH) in IDC during electricity emergency.

Suggested Citation

  • Zheng, Ziao & Huang, Bin & Lu, Gaofeng & Zhai, Xiaoqiang, 2022. "Design and optimization of an air-based phase change cold storage unit through cascaded construction for emergency cooling in IDC," Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:energy:v:241:y:2022:i:c:s0360544221031467
    DOI: 10.1016/j.energy.2021.122897
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    References listed on IDEAS

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    Cited by:

    1. Ma, Xiaowei & Zhang, Quan & Zou, Sikai, 2022. "An experimental and numerical study on the thermal performance of a loop thermosyphon integrated with latent thermal energy storage for emergency cooling in a data center," Energy, Elsevier, vol. 253(C).
    2. Liu, Lijun & Zhang, Quan & Zou, Sikai & Du, Sheng & Meng, Fanxi, 2023. "Experimental study on dynamic thermal characteristics of novel thermosyphon with latent thermal energy storage condenser," Energy, Elsevier, vol. 282(C).

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