Parameter Optimization of Supercritical CO<sub>2</sub> Recompression Cycle System for 50 MW Nuclear Reactor

XU Cailu; WANG Han; WU Jinghui; CHEN Xianjun; NIU Fenglei; Lü Haicai

doi:10.19805/j.cnki.jcspe.2026.240634

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Parameter Optimization of Supercritical CO₂ Recompression Cycle System for 50 MW Nuclear Reactor

更新时间：2026-10-10

- Parameter Optimization of Supercritical CO₂ Recompression Cycle System for 50 MW Nuclear Reactor
- Chinese Journal of Power Engineering Vol. 46, Issue 1, Pages: 181-188(2026)
- 作者机构：
  
  华北电力大学核科学与工程学院,北京,102206
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240634
  CLC：
- Online First：15 January 2026，
  
  Published：15 January 2026
- 稿件说明：
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许才禄,王汉,吴景辉,陈衔骏,牛风雷,吕海财. 50MW核反应堆超临界二氧化碳再压缩循环系统参数优化动力工程学报, 2026, 46(1): 181-188 https://doi.

org/10.19805/j.cnki.jcspe.2026.240634
许才禄,王汉,吴景辉,陈衔骏,牛风雷,吕海财. 50MW核反应堆超临界二氧化碳再压缩循环系统参数优化动力工程学报, 2026, 46(1): 181-188 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240634.

org/10.19805/j.cnki.jcspe.2026.240634 DOI：

摘要

针对50 MW小型核反应堆系统建立再压缩布雷顿循环系统的计算程序模型

并采用能量均分计算方法校核换热器内的全尺寸换热过程

并对高温回热器、低温回热器和预冷器进行了夹点分析。结果表明:系统最大热效率随压比和分流比的增大均呈现先增大后减小趋势

最佳压比和分流比分别为2.8和0.6;通过参数匹配优化

该系统的最高热效率可达46.20%;仅在预冷器内出现了传热受阻的夹点换热;在相同换热端差下

可通过增大预冷器冷却水质量流量的方式来避免预冷器传热夹点现象的发生。

Abstract

A computational program model of recompression Brayton cycle system was constructed for 50 MW small nuclear reactor

the full-scale heat exchange process within the heat exchanger was verified using the energy equalization calculation method

and pinch point analysis was conducted for high-temperature recuperator

low-temperature recuperator and precooler. Results show that the maximum thermal efficiency tends to increase first and then decrease with the rise in compression ratio and split ratio

and the optimal compression ratio and split ratio are 2.8 and 0.6 respectively. The maximum thermal efficiency of the system can reach 46.20% through parameter matching optimization. Heat transfer pinch point only occurs in precooler. Under the same heat exchange end difference

the occurrence of heat transfer pinch point in precooler can be avoided by increasing the mass flow of precooler cooling water.

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references

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Parameter Optimization of Supercritical CO2 Recompression Cycle System for 50 MW Nuclear Reactor

DOI：10.19805/j.cnki.jcspe.2026.240634

摘要

Abstract

关键词

Keywords

references

Parameter Optimization of Supercritical CO₂ Recompression Cycle System for 50 MW Nuclear Reactor