储能科学与技术 ›› 2021, Vol. 10 ›› Issue (1): 370-378.doi: 10.19799/j.cnki.2095-4239.2020.0256

• 储能系统与工程 • 上一篇    下一篇

CAES储气库设计参数对其热力学特性影响

万发1(), 蒋中明1,2(), 唐栋1,3   

  1. 1.长沙理工大学水利工程学院
    2.长沙理工大学水沙科学与水灾害防治湖南省重点实验室
    3.长沙理工大学洞庭湖水环境治理与生态修复湖南省重点实验室,湖南 长沙 410114
  • 收稿日期:2020-08-05 修回日期:2020-09-15 出版日期:2021-01-05 发布日期:2021-01-08
  • 通讯作者: 蒋中明 E-mail:wfwanfa123@163.com;zzmmjiang@163.com
  • 作者简介:万发(1991—),男,博士研究生,主要从事压气储能技术相关研究,E-mail:wfwanfa123@163.com
  • 基金资助:
    国家自然科学基金项目(51778070);湖南省研究生科研创新项目(CX20190662)

The influence of CAES reservoir design parameters on thermodynamic properties

Fa WAN1(), Zhongming JIANG1,2(), Dong TANG1,3   

  1. 1.School of Hydraulic Engineering, Changsha University of Science & Technology
    2.Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province
    3.Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha University of Science & Technology, Changsha 410114, Hu'nan, China
  • Received:2020-08-05 Revised:2020-09-15 Online:2021-01-05 Published:2021-01-08
  • Contact: Zhongming JIANG E-mail:wfwanfa123@163.com;zzmmjiang@163.com

摘要:

为研究压缩空气储能(CAES)电站储气库热力学特性分布规律,并探究圆柱形洞室不同形体参数K(长度半径比值)以及入气口位置对储气洞室内热力学特性和能量存储的影响,本工作采用非等温共轭传热模型建立了CAES洞室三维模型,计算了不同形体参数K和不同入气口布置方式下充气段洞室内热力学过程。结果表明:CAES洞室内温度场存在显著不均匀性,但是压力分布差异性不大;圆柱形洞室体型参数K会显著影响洞室温度场,但对压力分布和存储?影响不大,K值越大,温度均值和极大值越大;入气口设在中部可显著降低温度均值和极大值,分别降低16 K和159.61 K,但不会影响存储?。因此,压气储能储气库内温度场存在不均匀性,不均匀温度场可在局部形成极高温,对衬砌和围岩的安全性产生重大威胁,采用中部入气并设计合理形体参数可在不影响能量存储的条件下有效改善温度场不均匀性,从而避免由不均匀温度产生围岩热应力破坏。

关键词: 压缩空气储能, 热力学特性, 储气库洞室, 设计参数, 存储?

Abstract:

The thermodynamic properties of compressed air energy storage (CAES) have been reported in recent years, including the mean gas pressure and temperature in a gas reservoir and the influence on the security of the surrounding rock, but the temperature and pressure distribution in the cavity have not been reported. To study the thermodynamic properties of a CAES gas storage cavern, the effects of different shape parameters K (ratio of length and radius), and the inlet position on the internal thermodynamic properties of the cylindrical cavity, a non-isothermal conjugate heat transfer model was used to build a 3D model of a CAES gas storage cavern. The thermodynamic process of the charging stage was calculated under different values of K and with varied air inlet layouts. The results of the study indicated that: ① the temperature field in the CAES hole was heterogeneous, but the pressure field was uniformly distributed; ② a cylindrical cavity shape had a significant influence on the temperature field of the cavity, but little influence on the pressure distribution and exergy storage. In other words, the bigger the K value, the bigger the mean temperature and the maximum; ③ placing the air inlet in the center of the cavity significantly reduced the mean and maximum temperatures by 16 K and 159.61 K, respectively, but did not affect the exergy storage; ④ there was inhomogeneity in the temperature field of the CAES air storage cavern, where extremely high temperatures could form locally, which seriously threatens the safety of the lining and surrounding rock. The inhomogeneity of the temperature field can be improved by placing the air inlet in the center and designing reasonable shape parameters to avoid the thermal stress damage of surrounding rock caused by the temperature inhomogeneity.

Key words: compressed air energy storage, thermodynamic characteristics, gas storage caverns, design parameters, exergy storage

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