供水温度对高背压热电联产系统能耗水平的影响

doi:10.16085/j.issn.1000-6613.2017-0734

化工进展 ›› 2018, Vol. 37 ›› Issue (01): 96-104.DOI: 10.16085/j.issn.1000-6613.2017-0734

供水温度对高背压热电联产系统能耗水平的影响

时斌, 王宁玲, 李晓恩, 张雨檬, 杨志平

华北电力大学国家火力发电工程技术研究中心, 北京 102206

收稿日期:2017-04-24 修回日期:2017-05-11 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: 王宁玲,副教授,研究方向为大数据方法在电力生产中的应用、热电联产系统节能与优化。
作者简介:时斌(1991-),男,硕士研究生。E-mail:shibinhbbd@126.com。
基金资助:
国家科技支撑计划（2014BAA06B02）及国家重点基础研究发展计划（2015CB251505）项目。

Impacts of water supply temperature on energy consumption of high back pressure cogeneration system

SHI Bin, WANG Ningling, LI Xiao'en, ZHANG Yumeng, YANG Zhiping

National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China

Received:2017-04-24 Revised:2017-05-11 Online:2018-01-05 Published:2018-01-05

摘要/Abstract

摘要： 高背压供热模式是提高能源利用率、降低火力发电煤耗的有效途径，从全局角度研究一次网设计供水温度取值对热电联产系统的影响、确定热网供水温度最佳设计值是热电联产系统参数设计的核心问题。本文利用热网变工况模型及Ebsilon软件仿真，以某310MW直接空冷高背压供热机组与热网组成的热电联产系统为研究对象，分析了设计参数（供热负荷、一次网供水温度）不同时整个供热周期内系统能源转化效率及能耗水平。结果表明：一次网设计供水温度取值不同时，系统周期供电煤耗极差可达4.56g/kW·h；供热负荷设计值较低时，系统周期净供电功率在一次网设计供水温度取中间某值时存在最大值；供热负荷设计值较高时，随一次网设计供水温度增加，系统周期净供电功率不断增加。

关键词: 高背压, 热电联产, 设计供水温度, 系统周期净供电功率, 系统周期供电煤耗

Abstract: Heat supply is effective to improve the overall efficiency and reduce the coal consumption rate in air-cooled power plants. A key issue about design optimization of cogeneration system is to determine the optimal values of the designed primary network water supply temperature, based on the performance variation of overrall system resulting from the temperature of supply water in the primary network. The heat transfer efficiency and energy consumption were analyzed for different design parameters, i.e. heating load and primary side water supply temperature. The heating characteristics under off-design conditions were discussed with the mechanism modeling and Ebsilon platform. Results showed that design value of primary side water supply temperature had significant effect on system heat transfer efficiency and energy consumption. The variation of coal rate was 4.56g/kW·h due to the change of primary side water supply temperature.

Key words: high back pressure, cogeneration, design water supply temperature, system power supply during heating period, system coal rate during heating period

中图分类号:

TM621

时斌, 王宁玲, 李晓恩, 张雨檬, 杨志平. 供水温度对高背压热电联产系统能耗水平的影响[J]. 化工进展, 2018, 37(01): 96-104.

SHI Bin, WANG Ningling, LI Xiao'en, ZHANG Yumeng, YANG Zhiping. Impacts of water supply temperature on energy consumption of high back pressure cogeneration system[J]. Chemical Industry and Engineering Progress, 2018, 37(01): 96-104.

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供水温度对高背压热电联产系统能耗水平的影响

Impacts of water supply temperature on energy consumption of high back pressure cogeneration system

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