发电技术 ›› 2021, Vol. 42 ›› Issue (4): 509-516.DOI: 10.12096/j.2096-4528.pgt.21046

• 智能涡轮发电技术 • 上一篇    下一篇

700℃超超临界一次再热发电系统优化

杨美1,2(), 周云龙1,*(), 杨金福2(), 王迪1(), 韩东江2(), 包佳鑫1()   

  1. 1 东北电力大学能源与动力工程学院, 吉林省 吉林市 132012
    2 中国科学院工程热物理研究所, 北京市 海淀区 100190
  • 收稿日期:2021-04-29 出版日期:2021-08-31 发布日期:2021-07-22
  • 通讯作者: 周云龙
  • 作者简介:杨美(1988), 女, 博士, 讲师, 主要从事大型燃煤发电机组系统设计及节能分析方面的科学研究, yangmei@neepu.edu.cn
    杨金福(1961), 男, 博士, 研究员, 主要从事热能动力装置及热力循环系统方面的科学研究, yangjinfu@iet.cn
    王迪(1989), 男, 博士, 副教授, 主要从事发电厂热力系统设计研究, wangdi1989125@163.com
    韩东江(1986), 男, 博士, 副研究员, 主要从事高速微型动力装置及旋转机械轴系动力学研究, handongjiang@iet.cn
    包佳鑫(1995), 女, 硕士, 主要从事电厂热力系统设计与优化方面的研究, jiaxin-bao@yeah.net
  • 基金资助:
    国家重点研发计划项目(2018YFB0604404);吉林市科技发展计划项目(20190104125)

Optimization of 700℃ Ultra-supercritical Single Reheat Power Generation System

Mei YANG1,2(), Yunlong ZHOU1,*(), Jinfu YANG2(), Di WANG1(), Dongjiang HAN2(), Jiaxin BAO1()   

  1. 1 School of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, Jilin Province, China
    2 Chinese Academy of Sciences University, Haidian District, Beijing 100190, China
  • Received:2021-04-29 Published:2021-08-31 Online:2021-07-22
  • Contact: Yunlong ZHOU
  • Supported by:
    National Key Research and Development Program of China(2018YFB0604404);Jilin Science and Technology Development Plan Project(20190104125)

摘要:

针对超超临界一次再热机组、汽轮发电机组抽汽回热过热度高,造成回热系统不可逆损失大、系统完善度不佳等问题,分析了MAST CYCLE热力系统(简称MC系统)热力学性能,此系统可有效降低回热抽汽过热度,但系统相对复杂。采用热力学参数优化、匹配及结构集成方法对超超临界一次再热机组进行分析优化,得到加4级外冷器优化系统为系统集成的最优方案,供电效率达到49.58%;并对其进行余热利用挖潜,计算得到系统供电效率达到50.07%。研究结果为700℃超超临界机组系统优化设计提供了一种更有效的途径。

关键词: 超超临界机组, MAST CYCLE热力系统, 压力优化, 余热利用, 供电效率

Abstract:

The superheat degree of steam extraction is high in the ultra-supercritical single reheat unit. It results in largely irreversible loss and poor system perfection. The thermodynamic performance of the MAST CYCLE thermodynamic system was analyzed, which can effectively reduce the superheat of regenerative extraction steam. However, the system is relatively complex. The optimization system of single reheat with 4-stage external coolers is the best scheme of system integration, and the power supply efficiency reaches 49.58%. The waste heat of the system was used. The calculation results show that the power supply efficiency of the system reaches 50.07%, which provides a more effective way for the optimization design of 700℃ ultra-supercritical unit system.

Key words: ultra-supercritical unit, MAST CYCLE thermodynamic system, pressure optimization, waste heat utilization, power supply efficiency

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