Abstract The design and the performance of a medium-scale modular solar power plant (~20 MW) integrating a gas turbine combined cycle with a fluidized particle-in-tube receiver and direct thermal storage are investigated in this paper. A practical technique is used to design each part of the solar power plant. The complete design starts with the solar gas turbine (SGT) since it defines the necessary power to run it; then, the other parts are designed upstream. Three different cases are investigated under different operation strategies corresponding to two particle temperatures 750 °C and 880 °C, and hybrid and solar-only operation modes respectively. The results show that the nominal efficiency of the components including the heliostat field, the solar receiver, the gas turbine, and the steam turbine can reach 67%, 80%, 32%, and 34.5% respectively. As a result, the nominal thermal efficiency and the annual capacity factor of the complete solar power plant achieve 46% and 33.47% respectively. The overall nominal efficiency (solar-to-electric efficiency) of the plant for hybrid operation mode is 25.80%. It varies from 21.16% to 24.7% for the solar-only operation mode. Special interest is shown to the part-load operations.

中文翻译：

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使用流化粒子太阳能接收器技术的模块化联合循环太阳能发电厂的设计和性能

摘要 本文研究了将燃气轮机联合循环与流化管内颗粒接收器和直接蓄热相结合的中型模块化太阳能发电厂 (~20 MW) 的设计和性能。一种实用的技术被用来设计太阳能发电厂的每个部分。完整的设计从太阳能燃气轮机 (SGT) 开始，因为它定义了运行所需的功率；然后，其他部分在上游设计。在分别对应于两种粒子温度 750 °C 和 880 °C 以及混合和仅太阳能操作模式的不同操作策略下研究了三种不同情况。结果表明，定日镜场、太阳能接收器、燃气轮机和汽轮机等部件的标称效率分别达到67%、80%、32%和34.5%。因此，整个太阳能电站的标称热效率和年容量系数分别达到46%和33.47%。混合运行模式下，该工厂的整体标称效率（太阳能到电力的效率）为 25.80%。对于纯太阳能操作模式，它从 21.16% 到 24.7% 不等。对部分负载操作表现出特别的兴趣。