Influence of heater on heat consumption rate of an ultra supercritical 1 000MW unit steam turbine

YANG Yu; FAN Shiwang; JIANG Jun; YANG Jiandao

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Influence of heater on heat consumption rate of an ultra supercritical 1 000MW unit steam turbine

更新时间：2025-09-28

- Influence of heater on heat consumption rate of an ultra supercritical 1 000MW unit steam turbine
- Thermal Power Generation Vol. 45, Issue 5, Pages: 79-83(2016)
- 作者机构：
  
  1. 上海发电设备成套设计研究院
  2. 上海汽轮机厂有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2016
- 稿件说明：
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YANG Yu, FAN Shiwang, JIANG Jun, et al. Influence of heater on heat consumption rate of an ultra supercritical 1 000MW unit steam turbine[J]. Thermal power generation, 2016, 45(5): 79-83.
DOI：

YANG Yu, FAN Shiwang, JIANG Jun, et al. Influence of heater on heat consumption rate of an ultra supercritical 1 000MW unit steam turbine[J]. Thermal power generation, 2016, 45(5): 79-83. DOI：

摘要

采用能级效率法对配置梯次循环(echelon cycle

EC)的超超临界1 000 MW机组中各级加热器的能量损失进行解耦分析。通过引入加热器的热耗率影响因子

获得额定工况(THA)

75%THA和50%THA 3种工况下各级加热器对降低热力系统热耗率的影响和变化规律。结果表明:在相同工况下

各级加热器对于降低热力系统热耗率的贡献从低压级向高压级逐级递减

因此

通过增加高压加热器级数来增加系统热效率的效果会越来越小。本文分析方法和结果可以为EC热力系统的设计、优化和推广应用提供参考。

Abstract

The energy level efficiency method was applied to carry out energy loss decoupling analysis for each stage heater in an ultra supercritical 1 000 MW unit steam turbine with echelon cycle(EC cycle).By introducing heat rate influence coefficient

the effect of each heater on reducing heat rate of the thermodynamic system under conditions of THA

75% of THA

50% of THA was obtained.The results show that

under the same working condition

the contribution of the heaters to reducing heat rate of the thermodynamic system decreases from low pressure stage to high pressure stage.Therefore

in thermodynamic systems

the effect of increasing the high pressure heaters on enhancing the system heat efficiency will turn little.The above analysis method and results can provide important references for design

optimization and application of the thermodynamic system with EC cycle.

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