International Journal of Frontiers in Engineering Technology, 2024, 6(5); doi: 10.25236/IJFET.2024.060511.
Siyu Du1,2, Yunhui Nie1,2,3
1Pingan Kaicheng Intelligent Safety Equipment Co., Ltd, Huainan, 232001, China
2Pingan Coal Mining Institute of Engineering Technology Co., Ltd, Huainan, 232001, China
3Anhui University of Science and Technology, Huainan, 232001, China
Taking Zhujidong Coal Mine as an example, the cooling technology of mine working face is studied, and the required cooling capacity of driving working face is calculated. According to the principle of carbon dioxide phase change large temperature difference refrigeration, the carbon dioxide refrigeration cycle system is designed, which is composed of compressor, oil and gas separation, gas cooler, evaporator, oil separation, sensor and related pipelines. The equipment is applied in the 1331(1) Yunshun driving face of Zhujidong Coal Mine. The outlet temperature of the air cooler is stable between 15℃ and 18℃ when the air flow rate is 810m3/min. The absolute humidity of the outlet of the working face decreases from 80% to 90% of the local fan inlet to 45% to 55%. The equipment solves the problem of controlling temperature and humidity of underground thermal environment and improves cooling and dehumidification effect.
Local refrigeration; Carbon dioxide transcritical; Dehumidify; Equipment
Siyu Du, Yunhui Nie. Research on underground local carbon dioxide transcritical refrigeration equipment. International Journal of Frontiers in Engineering Technology (2024), Vol. 6, Issue 5: 79-84. https://doi.org/10.25236/IJFET.2024.060511.
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