Geothermal-solar hybrid power generation is one of promising utilization technology of renewable energy, for effectively eliminating the inherent natures of solar intermittent and improving the low-temperature geothermal conversion efficiency. In this work, a novel hybrid power system with a double-pressure evaporation configuration is developed, the geothermal energy can be fully utilized to produce steams by providing considerable steam latent heat. The proportion of the input solar and geothermal energy can be readily coordinated, and the system thermo-economic analysis is then carried out under both the on-design and off-design conditions. A hybrid power system with the capacity of 10 MW_e is designed in this work, the thermal efficiency and the geothermal share reach to 15.05% and 78.62%, respectively. By considering the off-design system modeling, the results indicate that the system annual energy efficiency could be improved to 12.19% with a 4-hour thermal storage, apart from enhancing the system flexible operation, the solar investment will significantly be reduced by enlarging the geothermal share, and then contributes to achieving a favorable solar based LCOE of 6.38 cents/kWh with a remarkable hybrid benefit. The research findings lay a favorable feasible foundation for renewable exploitation and CO₂ emission reduction.

地热-太阳能混合发电是一种很有前景的可再生能源利用技术，可有效消除太阳能间歇性的固有性质，提高低温地热转换效率。在这项工作中，开发了一种具有双压力蒸发配置的新型混合动力系统，通过提供可观的蒸汽潜热，可以充分利用地热能产生蒸汽。输入太阳能和地热能的比例可以很容易地协调，然后在设计和非设计条件下进行系统热经济分析。容量为 10 MW _{e 的}混合动力系统本工作设计的热效率和地热份额分别达到15.05%和78.62%。通过考虑非设计系统建模，结果表明，4小时蓄热可将系统年能效提高到12.19%，除了提高系统的灵活运行能力外，还可以通过扩大光伏发电系统来显着降低太阳能投资。地热份额，然后有助于实现有利的基于太阳能的 LCOE 为 6.38 美分/千瓦时，并具有显着的混合效益。研究成果为可再生能源开发和CO ₂减排奠定了良好的可行基础。