Optimized selection of feedwater pump turbine for ultra-supercritical  double-reheat unit

MA Tingshan; MAO Yijun; HE Sheng; LIU Nianping; CHENG Dongtao; NING Zhe

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Optimized selection of feedwater pump turbine for ultra-supercritical double-reheat unit

Thermal Power Generation Issue 7, (2017)

更新时间：2025-09-28

- Optimized selection of feedwater pump turbine for ultra-supercritical double-reheat unit
- 作者机构：
  
  1. 西安西热节能技术有限公司,陕西,西安,710054
  2. 华能安源发电有限责任公司,江西,萍乡,337000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK262
- Published Online：02 August 2017，
  
  Published：2017
- 稿件说明：
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MA Tingshan, MAO Yijun, HE Sheng, et al. Optimized selection of feedwater pump turbine for ultra-supercritical double-reheat unit[J]. Thermal Power Generation, 2017, (7).
DOI：

MA Tingshan, MAO Yijun, HE Sheng, et al. Optimized selection of feedwater pump turbine for ultra-supercritical double-reheat unit[J]. Thermal Power Generation, 2017, (7). DOI：

摘要

传统给水泵小汽轮机以机组最大出力为选型基准，在机组THA及以下工况运行时小汽轮机运行效率相对下降较多。为提高小汽轮机运行效率，有必要开展给水泵小汽轮机优化选型研究。利用汽轮机补汽增大出力的原理，以机组THA工况对应出力为小汽轮机设计选型基准，需要更大出力时通过开启补汽来实现，可相对提高THA及以下工况小汽轮机运行效率。结合某二次再热机组给水泵小汽轮机选型分析实例，对优化前后小汽轮机工作参数进行计算，对比分析不同工况下小汽轮机耗汽量及对机组能耗指标的影响。结果表明，优化选型后，THA、75%THA和50%THA工况下对应小汽轮机进汽流量分别降低1.9、1.2、0.8 t/h，汽轮机热耗分别降低3.08、3.42、3.62 kJ/(kW・h)。该小汽轮机优化选型方法可在超超临界二次再热机组上推广应用。

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