光热电站采用超临界二氧化碳布雷顿循环发电系统论证

Demonstration of Supercritical Carbon Dioxide Brayton Cycle in Solar Thermal Power Generation

针对太阳能光热电站采用超临界二氧化碳布雷顿循环发电系统,以常规50MW等级光热电站边界条件为基准,分析了不同循环系统循环效率,选取了间冷式再压缩循环作为研究对象,对循环参数进行了分析和优化。结果表明:透平入口温度及压气机入口温度对循环效率影响较为明显,透平排气压力存在最优点,透平进气压力需综合考虑选取,再热对循环效率提升效果较为显著,实际工程应用时,采用一次再热时综合收益最高。

Aim at supercritical carbon dioxide Brayton cycle in solar thermal power generation,based on the boundary conditions of conventional 50 MW solar thermal power generation,the cycle efficiency of different cycle systems was analyzed.The intercooled recompression cycle was selected as the research object,and the cycle parameters were analyzed and optimized.The results showed that the influence of turbine inlet temperature and compressor inlet temperature on the circulation efficiency was obvious,the exhaust pressure of the turbine had the optimal point,the inlet pressure of the turbine need to be selected comprehensively,the reheat had a significant effect on the improvement of circulation efficiency,and the comprehensive benefit was the highest when the once reheat was used in practical engineering application.