液态CO2相变制冷降温试验研究

doi:10.16265/j.cnki.issn1003-3033.2017.08.021

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (8): 120-125.doi: 10.16265/j.cnki.issn1003-3033.2017.08.021

液态CO₂相变制冷降温试验研究

宋东平^1,2,3, 周西华^1,3,4 教授, 李景阳⁴, 白刚^1,2,3

1 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000;
2 湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭 411201;
3 矿山热动力灾害与防治教育部重点实验室,辽宁阜新 123000;
4 辽宁工程技术大学能源安全应用技术研究院,辽宁阜新 123000

收稿日期:2017-04-12 修回日期:2017-06-08 出版日期:2017-08-20 发布日期:2020-10-13
作者简介:宋东平(1990—),男,安徽芜湖人,博士研究生,主要研究方向为矿井火灾与热害防治。E-mail:278714109@qq.com。
基金资助:
国家自然科学基金资助(51274115);煤矿安全开采技术湖南省重点实验室开放基金资助(201501)。

Experimental study on cooling by phase transition of liquid CO₂

SONG Dongping^1,2,3, ZHOU Xihua^1,3,4, LI Jingyang⁴, BAI Gang^1,2,3

1 College of Safety Science & Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
2 Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan Hunan 411201, China;
3 Key Laboratory of Mine Thermodynamic Disasters & Control of Ministry of Education, Fuxin Liaoning 123000, China;
4 Institute of Energy Security Application Technology, Liaoning Technical University, Fuxin Liaoning 123000, China

Received:2017-04-12 Revised:2017-06-08 Online:2017-08-20 Published:2020-10-13

摘要/Abstract

摘要： 为解决煤矿深井开采过程中的降温问题,提出一种以液态CO₂作为冷源的热害治理新方法,采用自行设计的液态CO₂相变制冷降温装置进行地面试验,研究液态CO₂降温效果及其冷量利用率,以验证该降温方法的有效性。结果表明:试验条件下,液态CO₂注入流量分别为14.722、16.484、19.168和23.146 kg/min时,对应制冷能力依次为89.8、97.2、109.6 和128.6 kW,风流温度依次降低6.2、6.8、7.5和8.6℃,含湿量依次减少2.746、3.066 5、3.613 5和4.09 5 g/kg,液态CO₂冷量利用率达到95%以上;当液态CO₂注入量增加到一定程度时,该降温系统的制冷量达到最大;析湿工况下,换热器的析湿系数与入口风流相对湿度成正相关关系。

关键词: 矿井降温, 液态CO₂, 相变制冷, 降温效果, 冷量利用率

Abstract: In order to solve cooling problem in the process of deep mining in coal mines,this paper presents a new method using liquid CO₂ as cold source to control heat damage. For exploring the effectiveness of this cooling method, a liquid CO₂ phase transition cooling device was designed to make the ground-based tests aiming at studing cooling effect of liquid CO₂ and its utilization rate. The results show that when injection flow rate of liquid CO₂ are respectively 14.722, 16.484, 19.168 and 23.146 kg/min, the corresponding cooling capacity are respectively 89.8 , 97.2, 109.6 and 128.6 kW, airflow temperature decreases by 6.2,6.8,7.5and 8.6 ℃,and the moisture content decreases by 2.746, 3.066 5, 3.613 5 and 4.095 g/kg, the utilization rate of liquid CO₂ cooling capacity reaches more than 95%, that when liquid CO₂ injection amount increases to a certain extent, the cooling capacity of the cooling system reaches the maximum, and that the humidity coefficient of heat exchanger is positively correlated with the relative humidity of inlet air flow.

Key words: mine cooling, liquid CO₂, cooling by phase transition, cooling effect, utilization rate of cooling capacity

中图分类号:

X968

宋东平, 周西华, 李景阳, 白刚. 液态CO₂相变制冷降温试验研究[J]. 中国安全科学学报, 2017, 27(8): 120-125.

SONG Dongping, ZHOU Xihua, LI Jingyang, BAI Gang. Experimental study on cooling by phase transition of liquid CO₂[J]. China Safety Science Journal, 2017, 27(8): 120-125.

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液态CO₂相变制冷降温试验研究

Experimental study on cooling by phase transition of liquid CO₂

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