本文提出了一种带间冷回热的太阳能燃气轮机与卡林那循环组成的联合循环发电系统，对其热力性能进行了分析，并研究了关键运行参数对热力性能影响。塔式太阳能接收器将经过间冷压缩的压缩空气加热至1000℃用以驱动燃气轮机做功。卡林那循环用以回收燃气余热发电。基于蔡睿贤的比较法，推导出了该系统太阳能热发电效率的简明解析式。结果表明，当燃气轮机入口温度为1000℃时，该系统的炯效率和太阳能热发电效率分别可达到29％和27．5％，比太阳能燃气蒸汽联合循环分别高1．8％和1．6％。该系统的提出，为提高太阳能热发电系统的太阳能热发电效率提供了一种方法，并且对太阳能热发电耗水大的问题提供了一个解决途径。
A new solar thermal combined cycle using Kalina cycle is proposed in the present paper. The thermodynamic performance of the proposed system is investigated. On the top cycle of the proposed system, the compressed air after being intercooled is heated at 1000℃ or higher at the solar tower receiver and is used to drive the gas turbine to generate power. The ammonia-water mixture as the working substance of the bottom cycle recovers the waste heat from the gas turbine to generate power. As a result, the peak solar-to-electric efficiency of the proposed system is 27.5% at a gas turbine inlet temperature of 1000℃. The results obtained in the current study provide an approach to improve solar-to-electric efficiency and offer a potential to conserve water for solar thermal power plants in arid area.
参考文献
| [1] | Juergen Dersch;Michael Geyer;Ulf Herrmann;Scott A. Jones;Bruce Kelly;Rainer Kistner;Winfried Ortmanns;Robert Pitz-Paal;Henry Price .Trough integration into power plants-a study on the performance and economy of integrated solar combined cycle systems[J].Energy,2004(5/6):947-959. |
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