一个新的压气储能多层预应力内衬洞室多目标优化模型
A new multi-objective optimization model of multi-layer prestressed lining cavern for compressed air energy storage
黄典一 1马燕 1饶秋华 1易威 1杨文韬 1李鹏2
作者信息
- 1. School of Civil Engineering,Central South University,Changsha 410083,China
- 2. Power China Zhongnan Engineering Corporation Limited,Changsha 410014,China
- 折叠
摘要
地下多层洞室是压气储能(CAES)工程的关键环节,其优化设计对提高压气储能工程的效率至关重要,而大多数压气储能工程的洞室优化模型只考虑强度指标,未考虑经济性指标.本文采用有限元方法模拟了高温高压作用下的CAES多层洞室,计算了各层的应力场和应变场(通过试验验证了εθmax出现在衬砌层的顶部),并论证了衬砌层εθmax受结构参数的影响较小,以及预应力衬砌的必要性.预应力衬砌洞室的数值计算结果表明,施加预应力可以有效地减小εθmax,提高CAES预应力衬砌洞室的稳定性.建立了一种新的CAES预应力内衬洞室的多目标优化模型,该模型考虑了安全性(最小化预应力以满足其强度条件)和经济性(最小化洞室表面积以降低施工成本).计算结果表明,多目标优化模型比单目标优化模型(仅考虑强度指标)更安全、更经济地获得CAES多层洞室结构.
Abstract
Underground multi-layer cavern is a key component in the compressed air energy storage(CAES)engineering and its optimal design is of vital importance for improving the CAES efficiency,while most of the optimization models for CAES cavern only have strength index without consideration of economical index.In this study,a finite element method of the CAES multi-layer cavern under high temperature and high pressure is used to calculate stress and strain fields of each layer(The maximum circumferential strain εθmax is experimentally verified to appear at top points of the lining layer)and to demonstrate the necessity of the prestressed lining since εθmax of lining layer is little influenced by the structural parameters.Numerical results of the prestressed lining cavern indicate that the applied prestress can effectively decrease εθmax and improve the stability of CAES prestressed lining cavern.A new multi-objective optimization model of CAES prestressed lining cavern is established with consideration of safety(minimizing the prestress to satisfy its strength conditions)and economy(minimizing the cavern surface area to decrease the construction cost).Calculation results show that the multi-objective optimization model is superior to the single-objective optimization model(only strength index)since it can obtain a safer and more economical CAES multi-layer cavern structure.
关键词
压缩空气储能/多层洞室结构/热-力耦合/预应力衬砌/多目标优化Key words
compressed air energy storage/multi-layer cavern/thermal-mechanical coupling/prestressed lining/multi-objective optimization引用本文复制引用
基金项目
Education Letter from the Office of the State Administration of Traditional Chinese Medicine[2018]119(52078495)
Fundamental Research Funds for the Central Universities,China(2022ZZTS0149)
出版年
2023
NETL
NSTL
维普
万方数据