煤炭工程 ›› 2023, Vol. 55 ›› Issue (4): 156-161.doi: 10.11799/ce202304029

• 研究探讨 • 上一篇    下一篇

热害矿井采区大焓差降温系统实验研究

王文龙1,岳丰田2,高涛2,魏京胜3,郝永军4,付京斌4   

  1. 1. 中国矿业大学深部岩土力学与地下工程国家重点实验室
    2. 中国矿业大学
    3. 中国矿业大学 材料与物理学院 实验中心
    4. 集中能源集团
  • 收稿日期:2022-09-15 修回日期:2022-12-03 出版日期:2023-04-20 发布日期:2023-06-05
  • 通讯作者: 高涛 E-mail:gaotao1000@163.com

Experimental study of large enthalpy difference cooling device in mining area of thermal-hazard mines

  • Received:2022-09-15 Revised:2022-12-03 Online:2023-04-20 Published:2023-06-05

摘要: 基于热质交换原理与实验理论,设计了大焓差降温除湿实验系统,实验研究不同喷淋压力、气水比、喷水温度下对喷和顺喷的大焓差降温装置降温效果及其热工性能,结果表明大焓差降温装置的适应性强,可满足不同热害程度的采区降温需求。计算了热交换系数和热交换效率,结果表明,对喷方式的热交换效率和热交换系数分别为0.952和0.988,而顺喷方式的热交换效率和热交换系数分别为0.936和0.978。综上,喷嘴对喷方式降温除湿效果稍优于顺喷方式。并由实验数据拟合得到大焓差降温装置的对喷和顺喷的热交换效率系数及热接触系数的经验公式,可更精准的指导热害矿井采区降温工程与大焓差降温装置的设计。

关键词: 大焓差降温装置, 气水比, 热交换效率系数, 热接触系数

Abstract: Based on the experiment theory and heat and mass transfer theory, large enthalpy difference cooling and dehumidification experiment system is designed, which will study different spray pressure, gas-water ratio, cooling effect and thermodynamic performance of large enthalpy difference device that can realize spray water face to face and from one side in spray water temperature. The results show that large enthalpy difference cooling device is strong in adaptability, which can meet the cooling demand of mining area with different thermal damage. The heat exchange coefficient and the heat exchange efficiency are calculated. The results show that the heat exchange efficiency and heat exchange coefficient of the counter spraying method are 0.952 and 0.998 respectively, while the heat exchange efficiency and heat exchange coefficient of the downstream spraying method are 0.936 and 0.978 respectively. Consequently, the cooling and dehumidification effect of counter spraying method is slightly better than that of downstream spraying method. And the empirical formula of heat exchange efficiency coefficient and heat contact coefficient of large enthalpy difference cooling device is obtained by fitting the experimental data, which can more accurately guide the design of cooling project of mining area in thermal damage mine and large enthalpy difference cooling device.

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