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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (10): 409-415.DOI: 10.19912/j.0254-0096.tynxb.2021-0406

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基于压缩空气储能的CCHP系统特性研究

韩中合, 胡庆亚, 李鹏   

  1. 华北电力大学电站能量传递转化与系统教育部重点实验室,保定 071003
  • 收稿日期:2021-04-16 出版日期:2022-10-28 发布日期:2023-04-28
  • 通讯作者: 李鹏(1991——),男,博士、讲师,主要从事多元储能综合能源系统优化方面的研究。pengli@ncepu.edu.cn
  • 基金资助:
    河北省自然科学基金(E2018502059)

RESEARCH ON CHARACTERISTIES OF CCHP SYSTEM BASED ON COMPRESSED AIR ENERGY STORAGE

Han Zhonghe, Hu Qingya, Li Peng   

  1. Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power University),Ministry of Education, Baoding 071003, China
  • Received:2021-04-16 Online:2022-10-28 Published:2023-04-28

摘要: 以先进绝热压缩空气储能(AA-CAES)为基础,构建冷热电联产(CCHP)系统,对比4种不同储气室和运行方式方案下的系统特性,并针对关键参数进行敏感性分析。结果表明,采用恒温储气室且滑压运行时系统储能效率和效率最高;采用恒温储气室且恒压运行时系统能量密度最高。第二级换热器损最大,是提高系统性能时的首要优化目标。当换热器效能提高时,储能效率、效率均出现折点。储气室最大压比越大,系统储能效率和效率越低,能量密度越高。采用恒温储气室时,系统不受压缩/膨胀影响;采用恒壁温储气室时,较高的压缩/膨胀功率有利于提高储能效率和效率,但压缩功率升高会降低能量密度。

关键词: 先进绝热压缩空气储能, 冷热电联产, 储气室, 运行方式, 系统特性

Abstract: Based on advanced adiabatic compressed air energy storage (AA-CAES), a combined cooling, heating and power (CCHP) generation system is constructed. The system characteristics under four different gas storage chamber (GSC) and operation schemes are compared. The sensitivity analysis is carried out for the key parameters. The results show that, when the constant-temperature GSC and the sliding-pressure operation are adopted, the energy storage efficiencies and exergy efficiencies have the maximum values. The energy density is the highest when the constant-temperature GSC and the constant-pressure operation is used. The largest exergy destruction occurs in the second-stage heat exchanger (HE2), and HE2 is the primary optimization goal. As the efficiency of the heat exchanger increases, the energy storage efficiencies and exergy efficiencies appear to turning points. The greater the GSC maximum pressure ratio, the smaller the energy storage efficiencies and exergy efficiencies, and the bigger the energy densities. When the constant-temperature GSC is adopted, the system is not affected by compression/expansion power. However, when constant-wall-temperature GSC is adopted, higher compression/expansion power is conducive to energy storage efficiency and exergy efficiency, but an increase in compression power will reduce energy density.

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