Geotechnical Feasibility Analysis of Compressed Air Energy Storage (CAES) in Bedded Salt Formations: a Case Study in Huai’an City, China
Geotechnical Feasibility Analysis of Compressed Air Energy Storage (CAES) in Bedded Salt Formations: a Case Study in Huai’an City, China
复制标题
DOI：
10.1007/s00603-014-0672-z
复制
发表时间：
2015-09
影响因子：
6.2
通讯作者：
G. Zhang;Yinping Li;J. Daemen;Chunhe Yang;Yuehua Wu;Kai Zhang;Yanlong Chen
中科院分区：
文献类型：
--
作者：
G. Zhang;Yinping Li;J. Daemen;Chunhe Yang;Yuehua Wu;Kai Zhang;Yanlong Chen
长江下游是我国经济最发达的地区之一。为了保证电网的安全、稳定和经济运行，在该地区建设压缩空气储能（CAES）电站是必要的。对淮安市不纯层状盐层CAES进行了岩土工程可行性分析。首先，地质调查表明，张兴区块的盐组满足CAES储存的基本地质条件，尽管盐组的可能不利特征包括层理和不同百分比的杂质。其次，进行了力学试验，以确定层状盐岩层的力学特性。令人鼓舞的是，即使样品经历了大的蠕变变形，它们也没有失效。最后，通过数值模拟研究了单洞形状为梨形、矿柱宽度为最大直径的2倍、矿柱宽度为最大直径的3倍、矿柱宽度为最大两个运营洞采用了三种常规运营模式（内部压力9- 10.5MPa、10- 11.5MPa和11- 12.5MPa），而另外两个保持在高压下（内压10.5、11.5、12.5 MPa）作为备用;应急运行模式，其中两个运行洞穴保持在大气压力下（0.1 MPa），备用运行时（9 ~ 10.5 MPa），模拟第5年开始时的12个月。塑性区、位移和体积收缩的分析结果支持地下CAES电站建设的可行性。
The lower reaches of the Yangtze River is one of the most developed regions in China. It is desirable to build compressed air energy storage (CAES) power plants in this area to ensure the safety, stability, and economic operation of the power network. Geotechnical feasibility analysis was carried out for CAES in impure bedded salt formations in Huai’an City, China, located in this region. First, geological investigation revealed that the salt groups in the Zhangxing Block meet the basic geological conditions for CAES storage, even though the possible unfavorable characteristics of the salt formations include bedding and different percentages of impurities. Second, mechanical tests were carried out to determine the mechanical characteristics of the bedded salt formations. It is encouraging that the samples did not fail even when they had undergone large creep deformation. Finally, numerical simulation was performed to evaluate the stability and volume shrinkage of the CAES under the following conditions: the shape of a single cavern is that of a pear; the width of the pillar is adopted as two times the largest diameter; three regular operating patterns were adopted for two operating caverns (internal pressure 9–10.5 MPa, 10–11.5 MPa, and 11–12.5 MPa), while the other two were kept at high pressure (internal pressure 10.5, 11.5, and 12.5 MPa) as backups; an emergency operating pattern in which two operating caverns were kept at atmospheric pressure (0.1 MPa) for emergency while the backups were under operation (9–10.5 MPa), simulated for 12 months at the beginning of the 5th year. The results of the analysis for the plastic zone, displacement, and volume shrinkage support the feasibility of the construction of an underground CAES power station.