The combined operation of solar thermal power generation and conventional thermal power generation is conducive to improving output conditions.To optimize the combined operation,the paper proposes a novel S-CO2 solar-fossil complementary power generation system,which could significantly increase the proportion of solar energy input.In addition,it also proposes an economic-environmental optimization method for solar multiple and thermal energy storage capacity and takes the sensitive analysis for the optimal parameters of the system.The results show that the CO2 emission rate of the complementary system decreases,and there is an optimal net present value as the solar multiple and thermal energy storage capacity increase.The economic-environmental optimization method can simultaneously optimize the economic and environmental performance,which is beneficial for improving the net present value of the system,reducing CO2 emission,and providing important reference for the system design of solar-fossil complementary power plants.In addition,sensitive analysis shows that reducing heliostat field and thermal energy storage costs and increasing electricity price of solar power are helpful for developing the complementary power generation system.
Solar towerSupercritical CO2Brayton cycleMulti-objective optimization
万方数据
