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
ISSN1996-1073
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
DOI10.3390/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
被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
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
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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).
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