Optimization design of steam turbine with double-reheat in a 1 350MW ultra-supercritical unit

ZHANG Xiaoling; YAN Weiping; LIU Liheng; ZHU Yunfei

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Optimization design of steam turbine with double-reheat in a 1 350MW ultra-supercritical unit

Thermal Power Generation Vol. 45, Issue 1, Pages: 110-116(2016)

更新时间：2025-09-28

- Optimization design of steam turbine with double-reheat in a 1 350MW ultra-supercritical unit
- 作者机构：
  
  1. 华北电力大学能源与动力机械工程学院
  2. 国电科学技术研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2016
- 稿件说明：
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ZHANG Xiaoling, YAN Weiping, LIU Liheng, et al. Optimization design of steam turbine with double-reheat in a 1 350MW ultra-supercritical unit[J]. Thermal Power Generation, 2016, 45(1): 110-116.
DOI：

ZHANG Xiaoling, YAN Weiping, LIU Liheng, et al. Optimization design of steam turbine with double-reheat in a 1 350MW ultra-supercritical unit[J]. Thermal Power Generation, 2016, 45(1): 110-116. DOI：

摘要

为研究轴系布置和轴速对超超临界1 350 MW二次再热机组热效率和经济性的影响

构建了4种汽轮机型式的方案进行模拟和计算

分析了汽轮机排汽口数目、单双轴布置型式和轴速对机组经济性和热效率的影响。结果表明:对超超临界1 350 MW二次再热机组

宜优先选用4排汽

双轴

全、半速各一轴方案

厂净效率可达46.01%;其次可以考虑6排汽、单轴、全速方案;4排汽、单轴、全速方案和6排汽

双轴

全、半速各一轴方案皆因存在技术性限制或投资经济性劣势而不宜采纳。

Abstract

To investigate the influence of shaft arrangements and shaft speed on efficiency and economy of the 1 350 MW ultra-supercritical double reheat unit

schemes of four different steam turbine types were built to carry out simulation and calculations.The effects of exhausting outlet number

single-and doubleshaft arrangement(cross-compound or tandem-compound)and shaft speed selection on the unit's efficiency and economy were analyzed.The results show that

for the 1 350 MW ultra-supercritical double-reheat condensing unit

a tandem-compound 4-flow steam turbine with a primary rotor portion running at 3 000 rpm and a secondary rotor portion running at 1 500 rpm is the best scheme

the plant net efficiency can reach up to 46.01%.Then the second choice is the scheme of a cross-compound 6-flow steam turbine with rotor portion running at full-speed.Due to the technical limitation and investment economic weakness

it is better not adopt the scheme of a cross-compound 4-flow steam turbine with rotor portion running at full speed and the scheme of a tandem-compound 6-flow steam turbine with a primary rotor portion running at3000 rpm and a secondary rotor portion running at 1 500 rpm.

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