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Boiler is the key heat source equipment in the supercritical carbon dioxide (sCO2) power generation system. Different from traditional steam boilers, the particularity of sCO2 cycle power generation system brings great challenges to the design and safe operation of sCO2 boilers. At present, there is almost no research on boiler design method at home and abroad. Therefore, in this chapter a design method is proposed for the sCO2 boiler. The heat transfer characteristic test study of the 5MWe sCO2 test boiler was conducted, and the results show that the maximum deviation between the measurement results of the working medium temperature and the model calculation results is <4.5 °C, which reflects the accuracy of the design method. In addition, using this design method, a 300 MW coal-fired sCO2 boiler was designed. The basic size of the boiler is 12.5 m × 12.5 m × 52.2 m (depth × width × height). And the heat load of furnace volume, furnace cross-section, and cross-section of burner area are 91.93 kW/m3, 4.00 MW/m2, and 1.03 MW/m2, respectively. Under the design condition, the boiler fuel consumption is 98.8 t/h, the exhaust temperature is 110 °C, and the boiler thermal efficiency is 94.3%. This study has some reference value for the design of future sCO2 boilers.

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Heat Transfer Characteristics and Calculation Method of Supercritical CO2 Boiler: Experimental Verification and Conceptual Design

  • 章节

  • 发表日期：

    2025年

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  • Shengpeng Wang,
  • Kuankuan Qi,
  • Junjie Yan,
  • Yongqiang Qiao,
  • Xuwei Zhang,
  • Yifan Zhang,
  • Hongzhi Li,
  • Wengang Bai

摘要

Boiler is the key heat source equipment in the supercritical carbon dioxide (sCO2) power generation system. Different from traditional steam boilers, the particularity of sCO2 cycle power generation system brings great challenges to the design and safe operation of sCO2 boilers. At present, there is almost no research on boiler design method at home and abroad. Therefore, in this chapter a design method is proposed for the sCO2 boiler. The heat transfer characteristic test study of the 5MWe sCO2 test boiler was conducted, and the results show that the maximum deviation between the measurement results of the working medium temperature and the model calculation results is <4.5 °C, which reflects the accuracy of the design method. In addition, using this design method, a 300 MW coal-fired sCO2 boiler was designed. The basic size of the boiler is 12.5 m × 12.5 m × 52.2 m (depth × width × height). And the heat load of furnace volume, furnace cross-section, and cross-section of burner area are 91.93 kW/m3, 4.00 MW/m2, and 1.03 MW/m2, respectively. Under the design condition, the boiler fuel consumption is 98.8 t/h, the exhaust temperature is 110 °C, and the boiler thermal efficiency is 94.3%. This study has some reference value for the design of future sCO2 boilers.