| 燃煤CO2发电系统两级压缩优化 |
| |
| 引用本文： | 刘广林,徐进良. 燃煤CO2发电系统两级压缩优化[J]. 现代电力, 2021, 38(4): 386-391. DOI: 10.19725/j.cnki.1007-2322.2020.0173 |
| |
| 作者姓名： | 刘广林 徐进良 |
| |
| 作者单位： | 华北电力大学 能源动力与机械工程学院，北京市昌平区 102206 |
| |
| 基金项目： | 国家重点研发计划项目（2017YFB0601801） |
| |
| 摘 要： | 相对于燃煤水蒸汽发电机组，高参数燃煤CO2发电系统在效率、体积及选材方面都是具有潜在优势的新型发电系统。对燃煤CO2发电系统中压缩冷却流程进行优化研究，以压缩机总耗功和系统效率为评价指标，采用EES软件模拟分析。首先分析常规燃煤CO2发电系统中压缩机部分耗功及压缩机出口温度的变化规律，在此基础上依据能量梯级利用原理，提出优化系统。结果表明:压缩机总耗功随着低压压比增大先减小后增大，即低压压缩机存在最佳低压压比，当主蒸汽参数为30MPa/600 ℃时，最佳低压压比为1.66，系统效率为44.1%；低压压缩机出口温度随低压压比增加而增大，而高压压缩机出口温度变化趋势相反；优化压缩冷却流程，得到系统效率提高且随低压压缩机入口温度和压比增大而增加，当低压压缩机入口温度为160 ℃时，系统效率为46.2%，最佳压比为1.325。
|
| 关 键 词： | 燃煤发电 超临界CO2 热力学分析 系统优化 压比 布雷顿循环 |
| 收稿时间： | 2020-04-20 |
Optimization of Two-Stage Compression Process for Coal-Fired Carbon Dioxide Power System |
| |
| Affiliation: | School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing 102206, China |
| |
| Abstract: | In comparison with coal-fired steam generating set, high-parameter coal-fired carbon dioxide power generation system is such a new type of power generation system, which possesses potential advantages in efficiency, equipment volume and material selection. The optimization of the compression and cooling process in the coal-fired carbon dioxide power generation system was researched. Taking total power consumption and system efficiency of the compressor as evaluation indicators, the EES software was adopted to perform the simulation analysis. Firstly, the power consumption in the compressor and the change rule of compressor’s outlet temperature of conventional coal-fired carbon dioxide power generation system were analyzed. On this basis, according to the principle of energy cascaded utilization, an optimization system was proposed. Computation results show that total power consumption of the compressor first decreases and then increases along with the increase of pressure ratio of low-pressure (abbr. LP) compressor, i.e., there exists an optimal pressure ratio for LP compressor. By this time, the main steam parameter is 30MPa/600°C, the optimal pressure ratio of LP compressor is 1.66, and the system efficiency is 44.1%. The outlet temperature of LP compressor increases with the increase of the pressure ratio of LP compressor, however the variation trend of the outlet temperature of high pressure compressor was opposite. Based on the principle of energy cascaded utilization and optimizing the compression and cooling process, the system efficiency is improved and increases with the inlet temperature and the pressure ratio of the LP compressor. When the inlet temperature of LP compressor is 160°C and the system efficiency is 46.2%, the optimal compression ratio is 1.325. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《现代电力》浏览原始摘要信息 |
|
点击此处可从《现代电力》下载免费的PDF全文 |
|
