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Aiming at the demand for energy saving and carbon reduction in heating and cooling systems of civil buildings and to achieve the “carbon neutrality” goal in the building sector, an annual CO₂ heating and cooling system with soil cold storage is proposed in this study. The results show that the annual CO₂ heating and cooling system with soil cold storage and subcooling is superior to the basic CO₂ system in terms of thermodynamic performance. The annual average COP of Beijing is increased by 14.04%. The maximum improvement ratio of the annual performance coefficient is 12.91% in Harbin. The maximum subcooling degree in Beijing is 13.47°C. This study can provide a theoretical reference for the application of carbon dioxide refrigeration and heat pump technologies.

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Performance of Annual CO2 Space Heating and Cooling System integrated with Soil Cold Storage

  • 会议论文

  • 发表日期：

    2025年

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  • Baomin Dai,
  • Ronghua Miao,
  • Tongyu Duan,
  • Shengchun Liu

摘要

Aiming at the demand for energy saving and carbon reduction in heating and cooling systems of civil buildings and to achieve the “carbon neutrality” goal in the building sector, an annual CO₂ heating and cooling system with soil cold storage is proposed in this study. The results show that the annual CO₂ heating and cooling system with soil cold storage and subcooling is superior to the basic CO₂ system in terms of thermodynamic performance. The annual average COP of Beijing is increased by 14.04%. The maximum improvement ratio of the annual performance coefficient is 12.91% in Harbin. The maximum subcooling degree in Beijing is 13.47°C. This study can provide a theoretical reference for the application of carbon dioxide refrigeration and heat pump technologies.