This study delves into various factors contributing to mine heat hazards and the cooling technologies applicable to mine working faces. The research focuses on the development of mobile carbon dioxide transcritical green refrigeration technology and equipment for underground applications. Specifically, a mobile precision refrigeration device is developed, tailored for deep mining scenarios such as mines and tunnels, especially in regions plagued by severe heat hazards. Leveraging liquid carbon dioxide as both the refrigerant and the secondary coolant, this system capitalizes on the unique property of carbon dioxide. When transitioning from the supercritical state under high temperature and pressure to the subcritical state at low temperature and pressure, and particularly during the phase change from liquid to gas, carbon dioxide exhibits rapid and substantial heat absorption capabilities. This innovative approach enables swift cooling and dehumidification with a significant temperature differential. It not only minimizes energy consumption and operational losses but also markedly enhances the efficiency of cooling and dehumidification processes. As a result, the comfort of on-site workers is greatly improved, thereby optimizing the working environment in these challenging settings. 

Li Xing. Research on Underground Mobile Carbon Dioxide Transcritical Green Refrigeration Technology and Equipment. International Journal of Frontiers in Engineering Technology (2025), Vol. 7, Issue 4: 6-16. https://doi.org/10.25236/IJFET.2025.070402.

[1] Cai Shengjia, Zhang Yanling, Hu Zhanchao, Zhang Xinrong. Molecular Dynamics Simulation of Carbon Dioxide Diffusion in Supercritical Water. Science Bulletin, Vol. 2, 2019.

[2] Cui Zengguang, Li Ning, Zhang Xinrong. Utilization of Wastewater Heat from Large-scale Carbon Dioxide Heat Pump Power Plants for Heating. Electric Power Journal, Issue 3, 2014.

[3] Li Feng, Si Chunqiang, Ma Jin. Research and Application Progress of Carbon Dioxide Transcritical Refrigeration System. Refrigeration Technology, Issue 3, 2010.

[4] Liu Jia, Shang Xingyu, Zhang Xinrong. A Review of International Applications of Transcritical Carbon Dioxide Heating and Cooling Supply Technology. Energy Conservation and Environmental Protection. Issue 08, 2023.

[5] Du Y, et al. Organic solvent-free process for the synthesis of propylene carbonate from supercritical carbon dioxide and propylene oxide catalyzed by insoluble ion exchange resins. Green chemistry, 2005, 7.7:518- 523.