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Performance of Cooling and Heating System with Dual-Evaporating Temperature and Mechanical Subcooling Using CO2 for Data Centers
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Baomin Dai1, 2, Ziang Kong2, Shengchun Liu2, Jiabao Qian2, Weifeng Li1, Libiao Zhang3
Journal of Refrigeration | 2025, 46(1) : 86 - 93
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Journal of Refrigeration | 2025, 46(1): 86-93
Performance of Cooling and Heating System with Dual-Evaporating Temperature and Mechanical Subcooling Using CO2 for Data Centers
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Baomin Dai1, 2, Ziang Kong2, Shengchun Liu2, Jiabao Qian2, Weifeng Li1, Libiao Zhang3
Affiliations
  • 1.Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
  • 2.Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, 300134, China
  • 3.Zhejiang King Refrigeration Industry Co., Ltd., Shangyu, 312300, China
Published: 2025-02-16 doi: 10.12465/j.issn.0253-4339.2025.01.086
Outline
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A CO2 data center cooling and heating system integrated with dedicated mechanical subcooling and dual-temperature evaporation technology (DMS-DE) is proposed to realize green and efficient cooling for data centers and improve comprehensive energy efficiency. A thermodynamic and carbon emission performance system model was established and compared with the basic CO2 system (Base) and a single evaporating-temperature CO2 system with dedicated mechanical subcooling (DMS-SE). The results demonstrated that the DMS-DE system had the maximum coefficient of performance (COP), optimal subcooling degree, and discharge pressure. Therefore, adopting the DMS-DE can significantly increase the system COP and exergy efficiency. Compared with Base and DMS-SE, COP increased by 14.1% and 9.0%, and the exergy efficiency increased by 13.24% and 4.31%, respectively. The life cycle carbon emissions of the DMS-DE system were reduced by 16.1% and 9.3% compared with Base and DMS-SE, respectively. This study can provide a technical reference for the highly efficient and clean operation of combined heating and cooling utilization for data center scenarios.

Baomin Dai, Ziang Kong, Shengchun Liu, Jiabao Qian, Weifeng Li, Libiao Zhang. Performance of Cooling and Heating System with Dual-Evaporating Temperature and Mechanical Subcooling Using CO2 for Data Centers[J]. Journal of Refrigeration, 2025 , 46 (1) : 86 -93 . DOI: 10.12465/j.issn.0253-4339.2025.01.086
Funding
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  • Postdoctoral Science Foundation project(2023M732582)
Appendix
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Year 2025 volume 46 Issue 1
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Article Info
doi: 10.12465/j.issn.0253-4339.2025.01.086
  • Receive Date：2023-10-11
  • Online Date：2026-03-13
  • Published：2025-02-16
Article Data
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History
  • Received：2023-10-11
  • Revised：2023-11-17
  • Accepted：2024-01-04
Funding
Postdoctoral Science Foundation project(2023M732582)
Affiliations
    1.Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
    2.Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, 300134, China
    3.Zhejiang King Refrigeration Industry Co., Ltd., Shangyu, 312300, China

Corresponding:

Liu Shengchun, professor, School of Mechanical Engineering, Tianjin University of Commerce, 86-13920682426, E-mail: . Research fields: replacement of natural working medium, energy saving and optimization of refrigeration system.
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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