为深入研究不同工质和输出方式对太阳能-先进绝热压缩空气/二氧化碳联合储能系统性能的影响,提出4种运行方案。通过仿真计算,对比分析4种不同方案下系统的热力学与经济学特性,并研究关键参数对系统性能的影响。结果表明：采用二氧化碳为工质,只输出电能时系统的储能效率最高。而采用二氧化碳为工质,同时输出电能和热能时系统的年利润率最大。4种方案的储能效率与年利润率均随时间间隔的延长而降低。而随着对流传热系数越来越大,系统的储能效率与年利润率均先降低后升高。工质初始压力越高,4种方案的储能效率与年利润率就越高。
Abstract
In order to deeply study the effect of different working medium and output modes on the performance of the solar energy-advanced adiabatic compressed air/carbon dioxide combined energy storage system, four operating schemes are proposed. Through simulation calculation, the difference the thermodynamic and economic characteristics of the system under four different schemes are compared and analyzed, and the influence of key parameters on system performance are also studied. The results show that the energy storage efficiency of the system is the highest when carbon dioxide is used as the working medium and only the electric energy is output. While the system uses carbon dioxide as the working medium and both electricity and heat are exported, the system has the largest annual profit margin. The energy storage efficiency and annual profit margin of the four schemes decrease with the increase of time interval. As the convective heat transfer coefficient becomes higher and higher, the energy storage efficiency and annual profit margin of the system decrease first and then increase. The higher the initial pressure of working medium, the higher the energy storage efficiency and annual profit margin of the four schemes.
关键词
压缩空气储能 /
二氧化碳 /
性能分析 /
运行方式 /
太阳能
Key words
compressed air energy storage /
carbon dioxide /
performance analysis /
operation modes /
solar energy
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基金
河北省自然科学基金（E2018502059）
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