Thermoeconomic and techno-economic analysis on an ultra-supercritical unit with double-reheat cycle

DIAO Meiling; TANG Chunli; ZHU Xin; DENG Lei; CHE Defu

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Thermoeconomic and techno-economic analysis on an ultra-supercritical unit with double-reheat cycle

Thermal Power Generation Vol. 46, Issue 8, Pages: 23-29(2017)

更新时间：2025-05-30

- Thermoeconomic and techno-economic analysis on an ultra-supercritical unit with double-reheat cycle
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2017
- 稿件说明：
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DIAO Meiling, TANG Chunli, ZHU Xin, et al. Thermoeconomic and techno-economic analysis on an ultra-supercritical unit with double-reheat cycle[J]. Thermal Power Generation2017, 46(8): 23-29.
DOI：

DIAO Meiling, TANG Chunli, ZHU Xin, et al. Thermoeconomic and techno-economic analysis on an ultra-supercritical unit with double-reheat cycle[J]. Thermal Power Generation2017, 46(8): 23-29. DOI：

摘要

以某超超临界1 000 MW二次再热机组为例

构建热经济性分析模型及技术经济性分析模型

研究在负荷、主蒸汽参数及再热蒸汽参数变化时机组热经济性的变化规律

以及在年平均运行小时数、全厂效率和燃料价格变化时机组发电成本的变化规律。结果表明:与一次再热机组相比

二次再热机组热经济性受负荷影响较大

改变主蒸汽参数对其影响不明显

而改变再热蒸汽参数对其影响较为明显;机组发电成本随年平均运行小时数和机组效率降低而升高

在较低效率下进一步降低年平均运行小时数将使二次再热机组发电成本高于一次再热机组;二次再热机组的技术经济性在燃料价格较高时具有优势。

Abstract

An ultra-supercritical 1 000 MW double-reheat power plant is taken as an example to establish the thermal economic model and techno economic model. The effects of the load

main steam parameters and reheat steam parameters on thermal economy of the double-reheat unit are examined. Moreover

the influences of the operating hours

unit efficiency and fuel price on the cost of power generation are studied. The results show that

the thermal efficiency variation of the double-reheat unit caused by load change is larger than that of a single reheat unit. The effects of the main steam parameters on the thermal economy are negligible. Where as the reheat steam parameter considerably influences the thermal economy. In addition

the cost of power generation increases with the decreasing operation hours and unit efficiency. Furthermore

the cost of power generation for double-reheat unit is higher than that of a single reheat unit when the operating hours reduces under the condition of low efficiency. It means that the technology economy of double-reheat unit has a great advantage under condition with high flue prices.

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