Exergy analysis for coal-fired power generation system with supercritical carbon dioxide recompression cycle

CHEN Dongxu; HAN Zhonghe; ZHAO Linfei

doi:10.19666/j.rlfd.202001008

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Exergy analysis for coal-fired power generation system with supercritical carbon dioxide recompression cycle

Thermal Power Generation Vol. 49, Issue 10, Pages: 107-113(2020)

更新时间：2025-09-28

- Exergy analysis for coal-fired power generation system with supercritical carbon dioxide recompression cycle
- 作者机构：
  
  华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202001008
  CLC： TK123
- Published Online：15 September 2020，
  
  Published：2020
- 稿件说明：
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CHEN Dongxu, HAN Zhonghe, ZHAO Linfei. Exergy analysis for coal-fired power generation system with supercritical carbon dioxide recompression cycle[J]. Thermal Power Generation, 2020, 49(10): 107-113.
DOI：

CHEN Dongxu, HAN Zhonghe, ZHAO Linfei. Exergy analysis for coal-fired power generation system with supercritical carbon dioxide recompression cycle[J]. Thermal Power Generation, 2020, 49(10): 107-113. DOI： 10.19666/j.rlfd.202001008.

摘要

针对超临界二氧化碳再压缩燃煤发电系统

运用Ebsilon软件建立该系统的仿真模型

通过模拟仿真运行

得到该系统的?损分布情况

并分析了分流系数、透平入口温度、主压缩机出口压力等系统关键参数对各设备及系统?效率的影响。同时

对再压缩系统以及一次再热、二次再热、二次分流再压缩3种布置改进系统进行了对比分析。结果表明:锅炉部位的?损最大

其次是回热器部位;当不同参数变化时

不同设备的?效率对系统?效率产生主要的影响;分流系数、主压缩机出口压力对系统?效率的影响存在最优值;3种改进系统中

二次分流再压缩主要提高了高温回热器?效率

最终使系统?效率提高了2.896百分点

为最优的布置改进系统。

Abstract

A simulated model for supercritical carbon dioxide recompression coal-fired power generation system was established by Ebsilon software. The exergy loss distribution of the system was obtained through simulation operation. Moreover

the effects of split ratio

turbine inlet temperature

main compressor outlet pressure and other key parameters on exergy efficiency of each facility and the system were investigated. Meanwhile

a comparative analysis was conducted between the recompression system and the three layout improvement systems of reheat

double reheat and double recompression. The results show that

the largest exergy loss exists in the boiler

then is the recuperator. When different parameters change

the exergy efficiencies of efferent facilities mainly affect the system exergy efficiency. There is an optimal value for the effect of split ratio and main compressor outlet pressure on system exergy efficiency. Among the three layout improvement systems

the double recompression is the optimal system

it mainly increases the exergy efficiency of high temperature recuperator

which increases the system exergy efficiency by 2.896 percentage points.

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