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SOLRGT系统是基于间冷化学回热循环的一种新型中低温太阳能与化石能源互补系统,它使中低温太阳能品位间接得以提升,借助先进燃气轮机系统实现高效热功转换,化石能源节约率可达20%~30%。基本工况下相比同输入的单输入发电系统(槽式太阳能热发电、燃气蒸汽联合循环),发电成本下降了16.6%。为进一步研究SOLRGT的热力经济性能,选取太阳能输入份额Xsol、太阳倍数SM(系统年运行时间H)、单输入化石能源参比系统(燃气蒸汽联合循环)年运行时间HCC、工程各部分造价、天然气价、电价为不确定因素,分析SOLRGT发电成本、相对成本节约率、回收期的变化规律。研究表明:系统发电成本随着Xsol增大而增大;HCC4≤300 h(基本工况)或者SM≥2(Xsol=20.3%)时,SOLRGT系统的发电成本低于单输入系统;太阳能相关设备造价对发电成本影响最大。
SOLRGT system is a new type of low-temperature solar and fossil energy complementary system based on inter-cooling chemical cycle, which can indirectly improve the solar energy grade at low and medium temperature. With the help of advanced gas turbine system, high efficiency thermal power conversion can be achieved, saving fossil energy rate up to 20 % ~ 30%. Compared with the single-input generation system (trough solar thermal power generation and gas-steam combined cycle), the power generation cost has dropped by 16.6% under the basic conditions. In order to further study the thermodynamic performance of SOLRGT, the solar energy input share Xsol, solar multiple SM (system annual operating time H), single-input fossil energy reference system (gas-steam combined cycle) annual operating time HCC, engineering cost, natural gas The price and electricity price are uncertain factors, and analyze the regularity of SOLRGT power generation cost, relative cost saving rate and payback period. The results show that the cost of system power generation increases with the increase of Xsol; the cost of power generation of SOLRGT system is lower than that of single-input system when HCC4≤300 h (basic condition) or SM≥2 (Xsol = 20.3%); Cost has the greatest impact on power generation costs.