Layout Optimization and Dynamic Modelling Research of Gas Turbine-Supercritical CO<sub>2</sub> Combined Cycle

ZHANG Fan; MA Bowen

doi:10.19805/j.cnki.jcspe.2025.250391

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Layout Optimization and Dynamic Modelling Research of Gas Turbine-Supercritical CO₂ Combined Cycle

更新时间：2026-10-10

- Layout Optimization and Dynamic Modelling Research of Gas Turbine-Supercritical CO₂ Combined Cycle
- Chinese Journal of Power Engineering Vol. 45, Issue 12, Pages: 2068-2078(2025)
- 作者机构：
  
  1. 中煤(深圳)研究院有限责任公司,广东,深圳,518128
  2. 国家能源集团宁夏煤业有限责任公司煤制油分公司,宁夏,银川,751400
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.250391
  CLC：
- Online First：16 December 2025，
  
  Published：16 December 2025
- 稿件说明：
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张帆,马博文. 燃气轮机-超临界CO₂联合循环布局优化与动态特性研究动力工程学报, 2025, 45(12): 2068-2078 https://doi. DOI: 10.19805/j.cnki.jcspe.2025.250391.

org/10.19805/j.cnki.jcspe.2025.250391
张帆,马博文. 燃气轮机-超临界CO₂联合循环布局优化与动态特性研究动力工程学报, 2025, 45(12): 2068-2078 https://doi. DOI: 10.19805/j.cnki.jcspe.2025.250391. DOI：

org/10.19805/j.cnki.jcspe.2025.250391 DOI：

摘要

针对燃气轮机(GT)-超临界CO

(SCO

)联合循环系统

对比分析了10种循环布局的热力学性能和关键参数的影响

其中双级联单分流双膨胀布局具有较好的燃气轮机余热利用适配性。基于此循环结构

从机理出发建立了面向控制的GT-SCO

联合循环动态模型

并且开展了联合循环系统的动态仿真和动态特性研究。通过仿真探究燃气轮机与SCO

的耦合特性

着重分析了燃气轮机排气温度和排气流量对SCO

系统关键参数及输出功率的影响规律

以及燃气轮机进气量与联合循环系统输出总功率的关系。结果表明:优选的循环结构可以在热效率和系统复杂度之间折中;燃气轮机与SCO

动态响应具有较大差异

燃气轮机排气温度和排气流量阶跃引起的SCO

循环高温透平入口温度变化的过渡时间分别约为523、420 s

燃气轮机进气量阶跃产生的联合循环功率变化响应时间约为516 s。动态特性的研究为GT-SCO

联合循环功率灵活调节策略的设计提供了支撑。

Abstract

For the gas turbine(GT)-supercritical CO

(SCO

) combined cycle system

the thermodynamic performance of cycle layouts and the influence of key parameters were analyzed for ten cycle configurations. Among the potential layouts

the double-cascade single-split double-expansion layout has a better suitability to utilize the waste heat of gas turbine. Based on the selected layout

a control-oriented dynamic model of GT-SCO

combined cycle was established from the mechanism

and researches were carried out on the dynamic simulation and dynamic characterization of the combined cycle system. Through simulation

the coupling characteristics of gas turbine and SCO

were investigated

while the influence of gas turbine exhaust temperature and exhaust flow rate on the dynamic characteristics of SCO

system and its power output

as well as the relationship between airflow rate rate of gas turbine and the whole system power output

were analyzed. Results indicate that the optimized cycle layout achieves a trade-off between thermal efficiency and system complexity. There are significant differences in the dynamic responses of gas turbine and SCO

system. The transient durations of high-temperature turbine inlet temperature caused by step changes in exhaust temperature and exhaust flow rate of gas turbine are approximately 523 and 420 seconds

respectively. The transient duration of the combined cycle output power caused by airflow rate of gas turbine is 516 seconds. Relevant dynamic characteristic studies can provide a support for the design of flexible power regulation strategies in the GT-SCO

combined cycle.

关键词

Keywords

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Layout Optimization and Dynamic Modelling Research of Gas Turbine-Supercritical CO2 Combined Cycle

DOI：10.19805/j.cnki.jcspe.2025.250391

摘要

Abstract

关键词

Keywords

references

Layout Optimization and Dynamic Modelling Research of Gas Turbine-Supercritical CO₂ Combined Cycle