Energy loss analysis and optimization on an ultra supercritical 1000MW unit thermal system using echelon cycle

YANG Yu; XIA Xiaohua; JIANG Jun

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Energy loss analysis and optimization on an ultra supercritical 1000MW unit thermal system using echelon cycle

更新时间：2025-09-28

- Energy loss analysis and optimization on an ultra supercritical 1000MW unit thermal system using echelon cycle
- Thermal Power Generation Vol. 44, Issue 8, Pages: 74-78(2015)
- 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：2015
- 稿件说明：
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YANG Yu, XIA Xiaohua, JIANG Jun. Energy loss analysis and optimization on an ultra supercritical 1000MW unit thermal system using echelon cycle[J]. Thermal power generation, 2015, 44(8): 74-78.
DOI：

YANG Yu, XIA Xiaohua, JIANG Jun. Energy loss analysis and optimization on an ultra supercritical 1000MW unit thermal system using echelon cycle[J]. Thermal power generation, 2015, 44(8): 74-78. DOI：

摘要

以某超超临界1 000MW机组的THA工况为例

采用能级效率法对梯次循环(EC)的热力系统进行能损分析

获得了该工况下热力系统的能损值

验证了能级效率法的计算精度。针对热力系统分缸压力及抽汽压力的优化设计

采用模式搜索算法对EC的热力系统进行优化

结果表明:采用EC后

在满足相关约束条件下

超超临界1 000 MW机组的热耗率由7 218.43kJ/(kW·h)降至7 177.22kJ/(kW·h)

设计热耗率显著降低。

Abstract

The energy grade efficiency method was applied to carry out energy loss analysis for thermal system of an ultra supercritical 1 000 MW unit with one reheat under THA condition.The energy loss value of the system under the above condition was obtained and the calculation accuracy of this energy grade efficiency method was verified.Moreover

a thermodynamic optimization method using pattern search was proposed for design of the cylinder pressure and extraction pressure.The result shows that

after the optimization

the heat rate of the echelon cycle thermal system dropped from 7 218.43kJ/(kW·h)to 7 177.22kJ/(kW·h)significantly

on the premise of satisfying the relative requirements from the factories.

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Related Institution

Shanghai Power Equipment Research Institute

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西安热工研究院有限公司

哈尔滨汽轮机厂有限责任公司

华能苏州热电有限责任公司

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