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The semi-closed supercritical CO2 cycle is an ideal new power generation cycle, which has a strong carbon capture capacity. This study developed four semi-closed sCO2 power cycle models: simple recuperated cycle, recompression cycle, intercooling recompression cycle, and intercooling reheat recompression cycle. Using Aspen Plus to simulate and analyze the cycle performance, it focuses on the effects of different cycle layouts and key parameters. The results show that recompression, intercooling, and reheating can significantly improve the cycle efficiency by about 4%, 2.35%, and 0.82%, respectively; the effect of both the turbine inlet temperature and the minimum temperature of turbine on the cycle is monotonical; there are optimal values for the turbine inlet pressure, main compressor inlet pressure, and split ratio to maximize cycle efficiency.

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System Simulation on Semi-closed Supercritical CO2-Mixture Working Fluid-Based Power Conversion Cycle: Cycle Layout

  • 章节

  • 发表日期：

    2025年

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  • Sen Liu,
  • Shigenao Maruyama,
  • Lin Chen

摘要

The semi-closed supercritical CO2 cycle is an ideal new power generation cycle, which has a strong carbon capture capacity. This study developed four semi-closed sCO2 power cycle models: simple recuperated cycle, recompression cycle, intercooling recompression cycle, and intercooling reheat recompression cycle. Using Aspen Plus to simulate and analyze the cycle performance, it focuses on the effects of different cycle layouts and key parameters. The results show that recompression, intercooling, and reheating can significantly improve the cycle efficiency by about 4%, 2.35%, and 0.82%, respectively; the effect of both the turbine inlet temperature and the minimum temperature of turbine on the cycle is monotonical; there are optimal values for the turbine inlet pressure, main compressor inlet pressure, and split ratio to maximize cycle efficiency.