华电技术 ›› 2021, Vol. 43 ›› Issue (3): 48-56.doi: 10.3969/j.issn.1674-1951.2021.03.008

• 智慧供热 • 上一篇    下一篇

燃煤热电联产系统冷端余能供热改造研究进展

方旭1a, 彭雪风1b, 张凯2, 马敬邦1b, 赵瑞祥1b, 王金星1b,*()   

  1. 1.华北电力大学 a.科技学院;b.能源动力与机械工程学院,河北 保定 071003
    2. 清华大学 能源动力与机械工程学院,北京100084
  • 收稿日期:2020-10-12 修回日期:2021-02-25 出版日期:2021-03-25 发布日期:2021-03-25
  • 通讯作者: 王金星
  • 作者简介:方旭(1997—),男,云南玉溪人,从事燃煤热电联产机组冷端余能供热改造方案优化研究(E-mail:1050374243@qq.com)。
    彭雪风(1998—),男,河南南阳人,在读硕士研究生,从事燃煤热电联产机组冷端余能供热及智能电网研究(E-mail:1251939703@qq.com)。
    张凯(1998—),男,山东烟台人,从事低压缸“零出力”供热改造方案技术经济性评价研究(E-mail:1143204067@qq.com)。
    马敬邦(1998—),男,内蒙古呼和浩特人,从事燃煤热电联产机组循环水余热回收供热运行策略评价及方案设计研究(E-mail:1035168972@qq.com)。
    赵瑞祥(1999—),男,河北沧州人,从事吸收式热泵余热回收供热改造方案优化设计研究(E-mail:1436587283@qq.com)。
  • 基金资助:
    河北省自然科学基金青年项目(E2020502007);中央高校基金面上项目(2020MS103)

Development of heating retrofit using waste heat from coal-fired CHP system cold end

FANG Xu1a, PENG Xuefeng1b, ZHANG Kai2, MA Jingbang1b, ZHAO Ruixiang1b, WANG Jinxing1b,*()   

  1. 1. a. School of Science and Technology;b. School of Energy,Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China
    2. School of Energy,Power and Mechanical Engineering,Tsinghua University,Beijing 100084,China
  • Received:2020-10-12 Revised:2021-02-25 Online:2021-03-25 Published:2021-03-25
  • Contact: WANG Jinxing

摘要:

高比例间歇性可再生能源的嵌入提高了对燃煤机组调峰能力的要求。在居民供暖需求量日益增加的背景下,热电联产系统冷端余能供热改造可有效缓解系统调峰能力不足和供热量不够的问题。介绍了高背压、热泵余热回收及低压缸“零出力”3种供热改造方式。通过具体改造实例对高背压供热改造方案进行了评估;以吸收式热泵为主,介绍了热泵余热回收供热改造原理并分析了其性能参数;以切除低压缸进汽、光轴改造为例,介绍了低压缸“零出力”供热改造方式的特点。总结了3种供热改造方式的适用情况,以期为后续的燃煤热电联产系统冷端余能供热改造提供参考。

关键词: 燃煤热电联产, 冷端余能, 高背压供热, 余热回收, 低压缸“零出力”, 燃煤机组调峰, 可再生能源, 吸收式热泵

Abstract:

The insertion of high-proportion intermittent renewable energy has increased the requirement for flexibility of coal-fired units.With the mounting demand for heating in residential areas,insufficient peak-regulating capacity and lack of heat supply can be alleviated by heating retrofits using waste heat from coal-fired CHP system cold end.Three transformation methods,high back-pressure,heat pump waste heat recovery and low-pressure cylinder "zero output" heating can be taken in this work.The high back-pressure heating transformation was evaluated based on practical cases.Then,focusing on the absorption heat pump,the heat pump waste-heat recovery heating transformation was introduced,including its operational principles and performance parameters.Taking cutting low-pressure cylinder and shaft heating reform as the example,the characteristics of low-pressure cylinder "zero output" heating transformation were listed. Finally,the applicability of the three heating transformation methods was summarized,which is expected to provide a reference for the following heating retrofits at coal-fired CHP system cold end.

Key words: coal-fired CHP system, waste heat of cold end, high back-pressure heating, waste heat recovery, zero output from low-pressure cylinder, peak shaving of coal-fired units, renewable energy, absorption heat pump

中图分类号: