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<p>Concentrated solar power generation is developing rapidly. Concentrated solar power generation systems without thermal energy storage face issues like large output fluctuation, low-capacity factor, and energy utilization efficiency. Thermal-energy-storage-equipped concentrated solar power generation systems offer the dual benefits of flexible power generation and improved grid integration of renewable energy, with key parameters such as solar multiple and thermal energy storage hour requiring optimization. In order to investigate its techno-economic performance, system models of 50&#xa0;MW tower concentrated solar power generation plants with molten salt as heat storage medium were firstly developed using MATLAB/Simulink and Aspen Plus. Real-time dynamic simulation was conducted based on meteorological data from four cities. Finally, this study analyzed the impact of solar multiple and thermal energy storage hour on levelized cost of electricity and carbon dioxide emission reduction. The results demonstrate that both the annual electricity generation and capacity factor of the plant increase with the increase of solar multiple and thermal energy storage hour. Through optimization, the solar multiple and thermal energy storage hour were determined at 2.7 and 12&#xa0;h, under which the plant achieves the lowest levelized cost of electricity of 127.65–206.55 $/MWh, with annual capacity factor of 42.91%-68.12% and annual electricity generation of 187.95–298.35 GWh. Furthermore, over a 30-year lifecycle, the total carbon dioxide emission reduction and fossil fuel saving of the plants are 4.75–7.54 million tonnes and 1.87–2.98 million tonnes. This study provides critical insights into system optimization, operational strategies, and techno-economic evaluation for tower concentrated solar power generation plants.</p>

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The Influence Study of Solar Multiple and Thermal Storage Hour on the Techno-Economic Performance of 50 MW Tower Solar Power Plant Through Modeling and Simulation

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Xiaoxian Zhang,
  • Pengcheng Zhang,
  • Xiaofeng Wang,
  • Xue Yan,
  • Dong Xiang

摘要

Concentrated solar power generation is developing rapidly. Concentrated solar power generation systems without thermal energy storage face issues like large output fluctuation, low-capacity factor, and energy utilization efficiency. Thermal-energy-storage-equipped concentrated solar power generation systems offer the dual benefits of flexible power generation and improved grid integration of renewable energy, with key parameters such as solar multiple and thermal energy storage hour requiring optimization. In order to investigate its techno-economic performance, system models of 50 MW tower concentrated solar power generation plants with molten salt as heat storage medium were firstly developed using MATLAB/Simulink and Aspen Plus. Real-time dynamic simulation was conducted based on meteorological data from four cities. Finally, this study analyzed the impact of solar multiple and thermal energy storage hour on levelized cost of electricity and carbon dioxide emission reduction. The results demonstrate that both the annual electricity generation and capacity factor of the plant increase with the increase of solar multiple and thermal energy storage hour. Through optimization, the solar multiple and thermal energy storage hour were determined at 2.7 and 12 h, under which the plant achieves the lowest levelized cost of electricity of 127.65–206.55 $/MWh, with annual capacity factor of 42.91%-68.12% and annual electricity generation of 187.95–298.35 GWh. Furthermore, over a 30-year lifecycle, the total carbon dioxide emission reduction and fossil fuel saving of the plants are 4.75–7.54 million tonnes and 1.87–2.98 million tonnes. This study provides critical insights into system optimization, operational strategies, and techno-economic evaluation for tower concentrated solar power generation plants.