压缩空气储能电站地下硐库首次充气的温度响应与局部高温控制方法  

Temperature response and local high temperature control method for the first inflation of underground cavern in compressed air energy storage power station

作　　者：孙冠华[1,2] 耿璇 于显杨 汪礼鹏 段继成 王振华 SUN Guanhua;GENG Xuan;YU Xianyang;WANG Lipeng;DUAN Jicheng;WANG Zhenhua(State Key Laboratory of Geotechnical Mechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;ShaanGu Group,Xi’an 710082,China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]中国科学院大学,北京100049 [3]陕西鼓风机(集团)有限公司,陕西西安710082

出　　处：《热力发电》2024年第9期29-38,共10页Thermal Power Generation

基　　金：湖北省自然科学基金重点项目(2022CFD031);国家自然科学基金青年科学基金项目(12302507)。

摘　　要：为从热力学角度探究压缩空气储能地下硐库型式,采用计算流体动力学(CFD)的计算方法,建立了考虑湍流、传热和真实空气特性的硐库首次充气加压过程数值模型;研究了硐库不同长径比和充气管道入口直径对硐内气体、内衬材料的温升及硐内温度分布的影响,并针对硐内局部高温现象提出了控制措施。结果表明:长径比较小时(即大罐式储气库),硐内温度分布较为均匀,随着长径比的增大(即隧道式储气库),硐内温度分布出现分层现象,并在硐库尾端出现极高温区(闷顶效应);钢板密封层在硐库充气加压过程中温升最大,混凝土衬砌温度变化较小,围岩几乎不受硐内温变影响;减小充气管道入口直径可以一定程度降低硐库内温度,促进向外传热;针对环形隧道式硐型,提出的改进充气方式可以使硐内温度分布均匀,避免闷顶效应,为工程设计提供有益参考。In order to explore the type of underground cavern with compressed air energy storage from the perspective of thermodynamics,a numerical model of the first inflation and pressurization process of the cavern considering turbulence,heat transfer and real air characteristics is established,by using the computational fluid dynamics(CFD)method.The effects of different length-diameter ratios and inlet diameters of inflatable pipes on temperature rise of gas and lining materials in the cavern and the temperature distribution in the cavern are studied,and the control measures are put forward for the local high temperature phenomenon in the cavern.The main conclusions are as follows.When the length-diameter ratio is small(large tank gas storage),the temperature distribution in the cavern is relatively uniform.With the increase of the ratio of length to diameter(tunnel-type gas storage),the temperature distribution in the cavern appears stratification phenomenon,and the extremely high temperature zone appears at the end of the cavern(stuffy top effect).The temperature rise of the steel plate sealing layer is the largest in the process of inflation and pressurization of the cavern,the temperature change of the concrete lining is small,and the surrounding rock is almost not affected by temperature change in the cavern.Reducing the inlet diameter of the inflatable pipe can reduce the temperature in the cavern to a certain extent and promote the outward heat transfer.For the annular tunnel type cavern,the proposed improved inflation method can make the temperature distribution in the cavern uniform,avoid the stuffy roof effect,and provide a useful reference for engineering design.

关 键 词：压缩空气储能 地下储气硐库 硐库型式 温度分布 

分 类 号：TM91[电气工程—电力电子与电力传动]