Design optimization of new supercritical carbon dioxide split recompression single reheat coal-fired power generation system

TONG Yongjing; DUAN Liqiang; PANG Liping

doi:10.19666/j.rlfd.202006183

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Design optimization of new supercritical carbon dioxide split recompression single reheat coal-fired power generation system

更新时间：2025-09-28

- Design optimization of new supercritical carbon dioxide split recompression single reheat coal-fired power generation system
- Thermal Power Generation Vol. 49, Issue 12, Pages: 1-8(2020)
- 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.202006183
  CLC： TK114
- Published Online：01 December 2020，
  
  Published：2020
- 稿件说明：
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TONG Yongjing, DUAN Liqiang, PANG Liping. Design optimization of new supercritical carbon dioxide split recompression single reheat coal-fired power generation system[J]. Thermal power generation, 2020, 49(12): 1-8.
DOI：

TONG Yongjing, DUAN Liqiang, PANG Liping. Design optimization of new supercritical carbon dioxide split recompression single reheat coal-fired power generation system[J]. Thermal power generation, 2020, 49(12): 1-8. DOI： 10.19666/j.rlfd.202006183.

摘要

基于基准300 MW超临界二氧化碳(S-CO2)分流再压缩一次再热布雷顿循环

提出了一种利用冷却器工质余热预热空气的新型S-CO2布雷顿循环系统。通过计算新系统与基准系统的能耗分布

揭示了新系统煤耗降低的原因

并进行了初步经济性分析。结果表明:新系统附加煤耗中锅炉占比最大

达81.72%

其次为冷却器;与基准系统相比

新系统可有效降低发电标准煤耗率

当空气预热器入口温度加热至80℃时

新系统可节煤4.53 g/(kW·h)

且静态投资回收期为6.98年

新系统发电标准煤耗率降低主要是由于冷却器和锅炉附加煤耗减少。

Abstract

On the basis of a reference 300 MW split recompression single reheat supercritical carbon dioxide(S-CO2) Brayton cycle

a new S-CO2 Brayton cycle system is proposed

in which the fresh air is firstly preheated by the waste heat of working medium in the cooler. By calculating the energy consumption distributions of both the reference and new systems

the reasons for the reduction of coal consumption in the new system are revealed and the preliminary economic performance analysis is carried out. The results show that

boiler equipment accounts for 81.72% of the additional coal consumption in the new system

then is the cooler. Compared with the reference system

the new system can effectively reduce the standard coal consumption rate of power generation. When the air temperature at the air preheater inlet is heated to 80 ℃ in the new system

the coal consumption can be saved by 4.53 g/(kW·h) compared with the reference system

and the static investment payback time is around 6.98 year. The reduction of standard coal consumption rate of new system is mainly due to the reduction of additional coal consumption of both the cooler and boiler.

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