Overall economical performance of 1 000 MW class ultra-supercritical unit  with double-reheat cycle

YAO Xiaolin; FU Chang; SHI Yanzhou; MENG Guixiang; WANG Anqing

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Overall economical performance of 1 000 MW class ultra-supercritical unit with double-reheat cycle

Thermal Power Generation Issue 7, (2017)

更新时间：2025-09-28

- Overall economical performance of 1 000 MW class ultra-supercritical unit with double-reheat cycle
- 作者机构：
  
  西安热工研究院有限公司,陕西,西安,710054
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK212.4
- Published Online：02 August 2017，
  
  Published：2017
- 稿件说明：
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YAO Xiaolin, FU Chang, SHI Yanzhou, et al. Overall economical performance of 1 000 MW class ultra-supercritical unit with double-reheat cycle[J]. Thermal Power Generation, 2017, (7).
DOI：

YAO Xiaolin, FU Chang, SHI Yanzhou, et al. Overall economical performance of 1 000 MW class ultra-supercritical unit with double-reheat cycle[J]. Thermal Power Generation, 2017, (7). DOI：

摘要

本文对百万等级超超临界二次再热机组的整体经济性进行研究，通过对影响整体经济性的各个因素的分析，结合一次再热、二次再热机组实例，定量分析机组经济性的差别，并根据实例机组性能考核试验结果，对二次再热机组实际性能进行了评判。研究结果表明：已投产的百万等级超超临界二次再热机组，除二次再热热力循环本身及参数的优势外，还在回热系统设计、降低管道压损、烟气余热回收利用、提高锅炉热效率、降低厂用电率等方面采取了一系列优化措施，这些因素共同作用使百万等级二次再热机组供电煤耗率设计值较一次再热机组降低了约5.7%；采用二次再热、蒸汽参数提升和回热系统优化大幅降低了机组热耗率，是二次再热机组整体经济性提升的主要原因；国内已投产的百万等级超超临界二次再热机组整体经济性满足设计要求，达到了目前燃煤机组的最高水平。

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