储能科学与技术 ›› 2023, Vol. 12 ›› Issue (12): 3749-3760.doi: 10.19799/j.cnki.2095-4239.2023.0548

• 复合储热专辑 • 上一篇    下一篇

耦合光热发电储热-有机朗肯循环的先进绝热压缩空气储能系统热力学分析

尹航1(), 王强1, 朱佳华2(), 廖志荣2(), 张子楠1, 徐二树2, 徐超2   

  1. 1.中国广核新能源控股有限公司,北京 100160
    2.华北电力大学能源动力与机械工程学院,北京 102206
  • 收稿日期:2023-08-18 修回日期:2023-09-18 出版日期:2023-12-05 发布日期:2023-12-09
  • 通讯作者: 朱佳华,廖志荣 E-mail:yinhang36@163.com;18210371612@163.com;zhirong.liao@ncepu.edu.cn
  • 作者简介:尹航(1978—),男,高级工程师,研究方向为新能源储能与光热发电,E-mail:yinhang36@163.com
  • 基金资助:
    国家自然科学基金项目(51976058);华北电力大学学科交叉创新专项项目

Thermodynamic analysis of an advanced adiabatic compressed-air energy storage system coupled with molten salt heat and storage-organic Rankine cycle

Hang YIN1(), Qiang WANG1, Jiahua ZHU2(), Zhirong LIAO2(), Zinan ZHANG1, Ershu XU2, Chao XU2   

  1. 1.CGN New Energy Holding Co. , Ltd. , Beijing 100160, China
    2.School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
  • Received:2023-08-18 Revised:2023-09-18 Online:2023-12-05 Published:2023-12-09
  • Contact: Jiahua ZHU, Zhirong LIAO E-mail:yinhang36@163.com;18210371612@163.com;zhirong.liao@ncepu.edu.cn

摘要:

先进绝热压缩空气储能是一种储能规模大、对环境无污染的储能方式。为了提高储能系统效率,本工作提出了一种耦合光热发电储热-有机朗肯循环的先进绝热压缩空气储能系统(AA-CAES+CSP+ORC)。该系统中光热发电储热用来解决先进绝热压缩空气储能系统压缩热有限的问题,而有机朗肯循环发电系统中的中低温余热发电来进一步提升储能效率。本工作首先在Aspen Plus软件上搭建了该耦合系统的热力学仿真模型,随后本工作研究并对比两种聚光太阳能储热介质对系统性能的影响,研究结果表明,导热油和太阳盐相比,使用太阳盐为聚光太阳能储热介质的系统性能更好,储能效率达到了115.9%,往返效率达到了68.2%,?效率达到了76.8%,储电折合转化系数达到了92.8%,储能密度达到了5.53 kWh/m3。此外,本研究还发现低环境温度、高空气汽轮机入口温度及高空气汽轮机入口压力有利于系统储能性能的提高。

关键词: 先进绝热压缩空气储能, 聚光太阳能辅热, 有机朗肯循环, 热力学模型, ?分析

Abstract:

Advanced adiabatic compressed-air energy storage is a method for storing energy at a large scale and with no environmental pollution. To improve its efficiency, an advanced adiabatic compressed-air energy storage system (AA-CAES+CSP+ORC) coupled with the thermal storage-organic Rankine cycle for photothermal power generation is proposed in this report. In this system, the storage of heat from photothermal power generation is used to solve the problem of limited compression heat in the AA-CAES+CSP+ORC, while the medium- and low-temperature waste heat generation in the organic Rankine cycle power generation system further improves the energy storage efficiency. Here, a thermodynamic simulation model of the coupled system was initially constructed using Aspen Plus software, and the influence of two types of concentrated solar heat storage media on system performance was subsequently studied and compared. The results show that compared with thermal oil and solar salt, the system using solar salt as the concentrated solar heat storage medium had a superior performance, and the energy storage efficiency reached 115.9%. The round-trip efficiency reached 68.2%, exergic efficiency reached 76.8%, exergic conversion coefficient reached 92.8%, and energy storage density attained 5.53 kWh/m3. In addition, the study found that low ambient temperature, high inlet temperature, and high air turbine inlet pressure are conducive to improving the energy storage performance of the system.

Key words: advanced adiabatic compressed air energy storage, thermal energy storage, organic rankine cycle, thermodynamic model, exergy analysis

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