【作者】 叶磊；

【导师】 刘卫群；

【作者基本信息】 中国矿业大学 ， 工程力学， 2020， 硕士

【摘要】 随着化石能源的消耗和环境问题的愈发严重,人们越来越重视可再生能源技术的发展,但可再生能源技术存在一些不足:可再生能源发电存在阶段性,直接接入电网会加重电网负担,破坏电网稳定性。因此大规模储能技术成为了可再生能源发展的重要环节。压缩空气储能作为仅有的两种百兆瓦级别的储能技术,不仅可以满足可再生能源发电的储存需要,更有无污染、安全性高、选址要求相对较低等优点。而地下含水层压缩空气储能技术(Compressed Air Energy Storage System in Aquifers,缩写为CAESA)是在压缩空气储能技术的基础上的进一步拓展,它用地下含水岩层替代传统压缩空气储能技术的储气罐,利用地下水提供压力,进一步缩减了成本,同时降低了发电站的选址要求。本文立足地下含水层压缩空气储能技术,耦合利用TOUGH2软件和FLAC3D软件构建了地下含水层储气库模型,对含水层压缩空气储能系统进行了THM(Thermo-Hydro-Mechanical)三场耦合分析。根据德国Huntorf压气储能电站相关参数设计了一个日循环CAESA系统,结果表明含水层渗透率和地质构造等固有条件对CAESA系统的影响起决定性作用,含水层渗透率过低系统无法运行,过高则会导致能量效率降低;而三种地质构造中,背斜构造最有利,循环周期最大、应力和位移变化最小,向斜构造条件最差。系统注气形成气囊会导致上下岩层向两侧位移,注气井位置上下岩层应力积聚最严重,随着系统循环进行,含水层中应力逐渐趋于初始状态,顶部位移部分恢复,但上下岩层应力变化极为缓慢,相对于含水层呈现滞后状态。该论文有图62幅,表10个,参考文献120篇。更多还原

【Abstract】 With the increasing consumption of fossil energy and environmental problems,people pay more attention to the development of renewable energy technology.However,there are some shortcomings in renewable energy technology: it cannot generate electricity continuously and stably.Directly connecting it to the power grid will increase the burden of the power grid and destroy the stability of the power grid.Therefore,large-scale energy storage technology has become an important part of renewable energy development.Compressed air energy storage,as the only two kind of 100 megawatt energy storage technologies,can not only meet the storage needs of renewable energy generation,but also have the advantages of pollution-free,high security and relatively low site selection requirements.Compressed air energy storage in aquifers,also known as CAESA,is a further development based on the technology of compressed air energy storage.It uses underground aquifers to replace the air tank in traditional compressed air energy storage system,using groundwater to provide pressure.It can further reduce the cost and reduce the site selection requirements of the power station.Based on the compressed air energy storage in aquifers,the model of underground aquifer gas storage was constructed by using TOUGH2 and FLAC3 D simulators in the thesis,analyzing the thermo-hydro-mechanical(THM)coupling model.According to the relevant parameters of Huntorf compressed air energy storage power station in Germany,a daily cycle CAESA system was designed.The results indicate that the inherent conditions of aquifers,such as permeability and geological structure,play decisive roles in CAESA.The over low permeability of aquifers makes the system unable to operate,while the over high permeability will reduce the energy efficiency;Among the three geological structures,anticline structure is the most favorable,it has the maximum cycle number and the minimum change of stress and displacement.Syncline structure is the worst condition.The formation of gas bubble by air injection will lead to the displacement of the upper and lower strata to both sides,and the stress accumulation of the upper and lower strata at the injection well location is the most serious.With the operation of the system,the stress in the aquifer gradually tends to the initial state,and the displacement of the top part recovers.However,the stress of the upper and lower strata changes very slowly,showing a lag state relative to the aquifer.There are totaly 62 figures,10 tables and 120 references in the thesis.更多还原