太阳能与燃煤互补系统变工况热力性能研究

Off-Design Thermodynamic Performance Investigation of Typical Power Generation System Integrated with Solar Energy

针对新疆昌吉地区典型330 MW燃煤机组提出了一种利用抛物面槽式太阳能聚光集热器进行互补发电的改造方案。依据昌吉地区的气象条件及燃煤电站全年实际运行性能参数,通过对互补系统在不同太阳辐照强度及不同汽轮机负荷下变工况性能的模拟分析,获得了互补系统在典型日及典型年的热力性能,揭示了关键运行及性能参数的变化规律。结果表明,互补系统年均净发电效率为15.0%,优于现有单一太阳能热发电技术。本文对传统燃煤电站的互补方案的设计和实施具有一定的参考价值。

An approach to repower a typical 330 MW coal-fired plant in Changji district of Xinjiang Province with parabolic trough solar collectors is proposed.Based on the weather condition of Changji and annual operating performance of the plant,the authors simulate the off-design performance of solar field and power block,respectively,under different solar radiation intensity and three different turbine loads.Thermodynamic performance of the hybrid system in both typical meteorology days and typical year is revealed.The variation of key operation and performance parameters with given conditions is illustrated.Results show that the annual average net solar to electric efficiency can reach 15.0%,which is higher than that of solar-only thermal power generation systems.The research can provide a guidance for design and implement of traditional power generation system integrated with solar energy.