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对修改的压缩前超临界CO2发电周期的性能分析和预测
Ertang Liang1, Biyi Cheng1,2, Chengcheng Zhang1
1School of Mechanical Engineering and Automation, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China.
Heliyon
|September 30, 2024
概括
修改后的压缩前跨临界二氧化碳循环为生物质发电提供了更高的热效率,在寒冷的地区,如中国东北部. 与传统设计相比,这种增强的循环在较低的压力比率下实现更高的效率.
科学领域:
- 可再生能源系统可再生能源系统
- 热力学是一种热力学.
- 环境工程 环境工程
背景情况:
- 生物质能源利用对于农村碳中和至关重要,特别是在中国东北部.
- 二氧化碳 (CO2) 热循环是适合生物质发电,因为高效率和缺乏结问题.
- 分流CO2循环提供更高的效率,但结构复杂,与更简单的单流布局不同.
研究的目的:
- 为寒冷气候地区的小型发电厂提出修改的压缩前超临界二氧化碳循环.
- 提高像黑龙江省这样的地区生物质发电效率.
- 为了满足寒冷地区发电设备的结构简单性要求.
主要方法:
- 对传统和修改的单流预压缩超临界CO2循环进行了能源分析.
- 在特定的操作条件下计算了热效率 (5MPa压缩机输入口,550°C轮机输入口).
- 在主要压缩机压力比率范围为4.5-5.5.5的范围内评估了性能.
主要成果:
- 经过修改的预压缩循环在压力比为5.0266.6时,达到44.86%的最佳效率.
- 传统的压缩前循环的最佳效率为43.55%,压力比为5.5.
- 修改后的循环在较低的主压缩机压力比率下显示出比传统循环更高的效率.
结论:
- 拟议的修改的压缩前超临界二氧化碳循环比在寒冷地区生物质发电的传统循环更有效.
- 这种修改的循环为中国东北部农村的高效和简单的生物质发电提供了可行的解决方案.
- 该研究强调了优化CO2循环的潜力,以满足特定的区域和季节性能源需求.
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