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工程科学与技术:2023,55(1):253-264
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中国废弃煤矿压气蓄能潜力与初步可行性研究
(1.重庆大学 煤矿灾害动力学与控制国家重点试验室,重庆 400044;2.重庆大学 资源与安全学院,重庆 400044;3.国家能源集团 神东煤炭布尔台煤矿,鄂尔多斯 017000)
Study on the Potential and Pre-feasibility of Compressed Air Energy Storage of Abandoned Coal Mines in China
(1.State Key Lab. of Coal Mine Disaster Dynamics and Control, Chongqing Univ., Chongqing 400044, China;2.School of Resources and Safety Eng., Chongqing Univ., Chongqing 400044, China;3.Shendong Coal Burtai Coal Mine, National Energy Group, Ordos 017000, China)
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投稿时间:2022-06-18    修订日期:2022-08-03
中文摘要: 随着中国化石能源比重下降、无碳能源比重上升的能源清洁化的结构转型,井下废弃矿井数量增多,同时风能和太阳能(WS)得到迅速发展,但资源利用率却很低。为了提高资源化利用率和加快转型升级,提出了一种结合风能和太阳能的混合压缩空气蓄能(CAES)系统,并将井下废弃矿井作为压缩空气的储能空间。首先,根据太阳能、风能、毁弃煤矿地下空间资源及电网分布特征确定了WS-CAES混合系统的潜在区域,主要分布在三北(东北、华北北部和西北)地区,具备了发展该系统的巨大潜力。然后,基于系统压缩机、膨胀机、热换器和储气室等各参数数学模型,研究了换热器效能、环境温度、质量流量、总压比和压缩/膨胀级数运行变量对系统输出功率和总效率的性能影响,压缩机/涡轮机级数对总效率(η)具有显着影响,级数2增至级数5时,η增幅为7.31%。最后,针对毁弃煤矿巷道储存高压气体的可行性,从巷道深度、内衬及围岩渗透性方面进行Comsol软件数值计算和分析,结果表明:巷道深度对系统储存气体的泄漏无明显影响;巷道内衬对系统稳定性具有重要作用;围岩渗透率则是决定系统气密性的关键因素,其围岩渗透率越小,储气库气体泄露量越小,气密性则越好;同时,煤矿井下主通风巷和运输巷具有储存压缩空气能力。
Abstract:With the structural transformation of energy cleanliness for the reduction of the proportion of fossil energy and the increase of the proportion of “carbon-free” energy in China, the number of abandoned underground mines has increased. At the same time, wind and solar energy (WS) have been developed rapidly, but the utilization rate of resources is very low. In order to improve resource utilization and upgrading of transformation, a hybrid compressed air energy storage (CAES) system combining wind power and solar energy is proposed, and the abandoned underground mines are used as energy storage space of compressed air. Firstly, according to the solar power, wind energy, underground space resources of abandoned coal mine and distribution characteristics of power grid, the potential area for the establishment of WS-CAES hybrid system are obtained, which are mainly distributed in the “three north” zones. Then, the mathematical model of system parameters such as compressor, expander, heat exchanger and air storage chamber are established. The operating variables of system include heat exchanger effectiveness, ambient temperature, mass flow rate, total pressure ratio and compressor/turbine stages. The performance effect of these operating variables on the system performance and total efficiency was evaluated. Finally, in view of the feasibility of storing high-pressure gas in the roadway of the abandoned coal mine, the numerical calculation and analysis with the Comsol software is carried out from the aspects of the depth of the roadway, the permeability of the lining and the surrounding rock. The results show that the depth of the roadway has no obvious effect on the leakage of the stored gas in the system, and the roadway lining mainly plays an important role in the stability of the system, while the permeability of the surrounding rock is the key factor determining the air tightness of the system. The smaller the permeability of surrounding rock, the smaller the gas leakage and the better the air tightness, and the underground main ventilation lane and the transportation lane have the ability to store compressed air.
文章编号:202200622     中图分类号:TK02    文献标志码:
基金项目:国家重点研发计划青年科学家项目(2021YFC2900400);国家自然科学基金青年基金项目(52104077)
作者简介:第一作者:杜俊生(1990-),男,博士生.研究方向:矿山灾害防治.E-mail:jsdu@cqu.edu.cn;通信作者:陈结,教授.E-mail:jiechen023@cqu.edu.cn
引用文本:
杜俊生,陈结,姜德义,范金洋,张传玖,陈紫阳.中国废弃煤矿压气蓄能潜力与初步可行性研究[J].工程科学与技术,2023,55(1):253-264.
DU Junsheng,CHEN Jie,JIANG Deyi,FAN Jinyang,ZHANG Chuanjiu,CHEN ziyang.Study on the Potential and Pre-feasibility of Compressed Air Energy Storage of Abandoned Coal Mines in China[J].Advanced Engineering Sciences,2023,55(1):253-264.