太阳能与燃气-蒸汽联合循环发电系统优化

Optimization of Fresnel solar and gas-steam combined cycle hybrid power generation system

针对华能南山电厂菲涅尔式太阳能与燃气-蒸汽联合循环发电(ISCC)系统中,太阳能集热场产生的过热蒸汽引入汽轮机低压段做功所导致的能量损失问题,提出了在太阳能集热场设置蓄热系统,以保证集热场出口过热蒸汽参数的稳定,并将过热蒸汽引入汽轮机的中压段做功。分析结果表明:与原始系统相比,ISCC改进系统太阳能发电功率提高了0.189 MW,光电转换效率提高了7%,系统热效率提高了0.15%,系统等效节气量提高了39.69m3/h,系统热力性能明显提高。

Integrated solar combined cycle（ISCC）is the integration of solar energy and gas-steam combined cycle power generation.It is an effective way of solar thermal utilization.The integration scheme of Huaneng ISCC experiment platform at Hainan Nanshan is injecting the heat generated by Fresnel solar collector field to the low pressure segment of turbine for power generation.This paper presents an improved ISCC integration scheme,which is injecting the heat generated by solar collector field to the medium pressure segment of turbine and setting thermal storage system to ensure the stability of the collector field output.The results show that,the improved integration scheme can effectively enhance the solar energy output by 0.189 MW,the solar-electric conversion efficiency by 0.15%,and the equivalent natural gas savings by39.69m3/h.The system economy is dramatically improved.