Lanzhou University of Technology Institutional Repository (LUT_IR)
Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine | |
Ge, Zhihua1; Zhang, Fuxiang1; Sun, Shimeng1; He, Jie1; Du, Xiaoze2 | |
2018-01 | |
发表期刊 | ENERGIES |
ISSN | 1996-1073 |
卷号 | 11期号:1 |
摘要 | To reduce the exergy loss that is caused by the high-grade extraction steam of traditional heating mode of combined heat and power (CHP) generating unit, a high back-pressure cascade heating technology for two jointly constructed large-scale steam turbine power generating units is proposed. The Unit 1 makes full use of the exhaust steam heat from high back-pressure turbine, and the Unit 2 uses the original heating mode of extracting steam condensation, which significantly reduces the flow rate of high-grade extraction steam. The typical 2 x 350 MW supercritical CHP units in northern China were selected as object. The boundary conditions for heating were determined based on the actual climatic conditions and heating demands. A model to analyze the performance of the high back-pressure cascade heating supply units for off-design operating conditions was developed. The load distributions between high back-pressure exhaust steam direct supply and extraction steam heating supply were described under various conditions, based on which, the heating efficiency of the CHP units with the high back-pressure cascade heating system was analyzed. The design heating load and maximum heating supply load were determined as well. The results indicate that the average coal consumption rate during the heating season is 205.46 g/kWh for the design heating load after the retrofit, which is about 51.99 g/kWh lower than that of the traditional heating mode. The coal consumption rate of 199.07 g/kWh can be achieved for the maximum heating load. Significant energy saving and CO2 emission reduction are obtained. |
关键词 | combined heat and power generation high back-pressure district heating cascade utilization of waste heat |
DOI | 10.3390/en11010119 |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Energy & Fuels |
WOS类目 | Energy & Fuels |
WOS记录号 | WOS:000424397600119 |
出版者 | MDPI AG |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/32900 |
专题 | 兰州理工大学 能源与动力工程学院 |
作者单位 | 1.North China Elect Power Univ, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China; 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Ge, Zhihua,Zhang, Fuxiang,Sun, Shimeng,et al. Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine[J]. ENERGIES,2018,11(1). |
APA | Ge, Zhihua,Zhang, Fuxiang,Sun, Shimeng,He, Jie,&Du, Xiaoze.(2018).Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine.ENERGIES,11(1). |
MLA | Ge, Zhihua,et al."Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine".ENERGIES 11.1(2018). |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Ge-2018-Energy Analy(1749KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论