提高太阳能空气加热器的性能,使用波纹板和穿孔隔离板
Badreddine Ayadi1, Khalil Hajlaoui2, Ali M Mohsen3
1Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City 81451, Saudi Arabia.
在波纸太阳能空气加热器 (SAH) 中添加 perforated baffles,可以通过增强热传递来提高热性能. 优化是平衡提高效率与增加压力下降的关键,以获得更好的可再生能源系统.
科学领域:
- 可再生能源工程可再生能源工程
- 可持续的供暖系统 可持续的供暖系统
- 热科学 热科学 热科学
背景情况:
- 太阳能空气加热器 (SAH) 对于可持续的供暖至关重要.
- 提高SAH的热性能对于有效利用太阳能至关重要.
- 波纹吸收板和遮光板是影响SAH效率的关键组件.
研究的目的:
- 为了研究带有孔的波纹吸收板对SAH传热和流量的影响.
- 在不同的流量条件下分析各种波形布局和距离距离.
- 优化SAH设计以提高热液压性能.
主要方法:
- 使用了三维计算流体动力学 (CFD) 模拟.
- 电网独立性和实验验证确保了数值的准确性.
- 分析涵盖了不同的雷诺兹数,阻隔器配置和音调距离.
主要成果:
- 穿孔隔离器通过诱导流和流量分离,显著增加了对流热传递.
- 观察到较高的努塞尔特数和传热系数.
- 案例A显示了比案例D在Re=5,000的27%更好的热性能;特定的偏差值配置提高了10-22%的效率.
结论:
- 穿孔的分离器提高了SAH的热效率,但增加了压力下降.
- 几何优化是必要的,以平衡传热增强和流电阻.
- 该研究为改善可再生能源应用中SAH的热液压效率提供了指导方针.
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