Operating Characteristics of Axial Flow Compressors and Cycle Systems for Different Capacities of sCO<sub>2</sub>

WANG Tianze; XU Jinliang; ZHENG Haonan

doi:10.19805/j.cnki.jcspe.2025.240117

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Operating Characteristics of Axial Flow Compressors and Cycle Systems for Different Capacities of sCO₂

更新时间：2025-10-16

- Operating Characteristics of Axial Flow Compressors and Cycle Systems for Different Capacities of sCO₂
- Chinese Journal of Power Engineering Vol. 45, Issue 5, Pages: 675-684(2025)
- 作者机构：
  
  1. 华北电力大学低品位能源多相流与传热北京市重点实验室,北京,102206
  2. 华北电力大学电站能量转换与系统教育部重点实验室,北京,102206
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240117
  CLC： TM621
- Published Online：19 May 2025，
  
  Published：2025
- 稿件说明：
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王天泽,徐进良,郑毫楠. 不同容量sCO₂轴流压缩机及循环系统运行特性动力工程学报, 2025, 45(5): 675-684 https://doi.

org/10.19805/j.cnki.jcspe.2025.240117
王天泽,徐进良,郑毫楠. 不同容量sCO₂轴流压缩机及循环系统运行特性动力工程学报, 2025, 45(5): 675-684 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240117.

org/10.19805/j.cnki.jcspe.2025.240117 DOI：

摘要

针对某超临界CO

(sCO

)燃煤循环机组提出了一种压缩机性能预测模型

并将压缩机、透平和锅炉模型与循环系统进行耦合。结果表明:压缩机的特征尺寸与容量遵循0.5次幂定律;容量和额定转速提升时

等熵效率同步提高;入口参数趋近临界点可同时降低功耗并提升效率。当进口条件固定时

等熵效率随出口压力升高呈现先升后降的抛物线趋势

峰值对应最优压比;当循环机组的转速恒定时

热效率随容量增加呈抛物线分布

峰值出现在300 MW容量点;若转速随着容量协同优化

热效率曲线仍为抛物线

但峰值位移至600 MW容量点

这是透平效率提升与锅炉压降增大2种效应权衡的结果。

Abstract

A compressor performance prediction model was proposed for certain sCO

coal-fired cycle unit

and the compressor

turbine and boiler models were coupled with the cycle system. Results show that the characteristic sizes and capacity of the compressor follow the 0.5 power law. As the capacity and rated speed increase

the isentropic efficiency improves accordingly. Power consumption is reduced and efficiency is increased when the inlet parameters approach the critical point. When the inlet conditions are fixed

the isentropic efficiency shows a parabolic trend of first increasing and then decreasing with the rise of outlet pressure

with the peak corre

sponding to the optimal pressure ratio. When the shaft speed of the cycle unit is constant

the thermal efficiency shows a parabolic distribution with the increase of capacity

with the peak appearing at the 300 MW capacity point. If the shaft speed is optimized in coordination with the capacity

the thermal efficiency curve remains parabolic

but the peak shifts to the 600 MW capacity point

due to the weighing effects of turbine efficiency improvement and boiler pressure drop increase.

关键词

Keywords

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Shanghai Power Equipment Research Institute Co., Ltd.

School of Energy, Power and Mechanical Engineering, North China Electric Power University

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Operating Characteristics of Axial Flow Compressors and Cycle Systems for Different Capacities of sCO2

DOI：10.19805/j.cnki.jcspe.2025.240117

摘要

Abstract

关键词

Keywords

references

Operating Characteristics of Axial Flow Compressors and Cycle Systems for Different Capacities of sCO₂