Thermodynamic analysis of a modified system for a 1000 MW single reheat ultra-supercritical thermal power plant
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Thermodynamic analysis of a modified system for a 1000 MW single reheat ultra-supercritical thermal power plant
- 发表刊物：
- Energy
- 摘要：
- Thermodynamics analysis is performed on the modified steam system for a 1000 MW single reheat ultrasupercritical power plant and compared to the reference one. In the modified system, all the flue gas
from the economizer is used to heat the partial condensate, and total air for combustion together with
the rest of condensate is preheated by extraction steam from turbine. The flowrate of the partial
condensate is adjustable to ensure its heat-capacity flowrate equivalent to that of the flue gas in the
modified scheme, which avoids the pinch point of temperature difference of the air preheater in
reference system. Results show that the exit temperature of flue gas from boiler can be reduced to a
lower value without cold end corrosion and clog. The power generation efficiency of the power plant of
48.35% is achieved, which is 1.27% points higher than that of reference unit at the same capacity. The
improvement of thermal efficiency is mainly from both the low-grade heat recovery of flue gas by the
flue gas-condensate preheater and the small temperature difference between the flue gas and the
condensate, therefore a higher inlet water temperature of the economizer can be reached.
- 合写作者：
- Yinhe Liu , Qinlun Li , Xiaoli Duan , Yun Zhang , Zhen Yang , Defu Che
- 卷号：
- 145
- 页面范围：
- 25-37
- 是否译文：
- 否
- 发表时间：
- 2018-02-15