摘要
侧风对间接空冷塔会产生不利影响,尤其对小型空冷塔,如用于地热发电和太阳能发电的空冷塔(高度低于30 m)的影响更为严重。对此,采用Fluent软件模拟了不同侧风速度下小型空冷塔内外空气流场、散热效率及温差的变化情况,提出在小型空冷塔内加装挡风墙,并对其进行数值模拟。结果表明:加装挡风墙后,空冷塔内外的空气流场分布得到了明显改善,可以有效地降低侧风影响;尤其在侧风速度>12 m/s时,散热效率随着风速的增加而提高。
Crosswind has adverse effect on performance of large scale indirect air cooling towers. However,for some small size towers,like the ones with height smaller than 30 m used for geothermal and solar power generation,the adverse effect will get more serious. Thus,by using the Fluent software,the variation of air flow field,radiation efficiency and temperature difference inside and outside the small size air cooling tower was simulated,and suggestion that adding windbreak walls inside the air cooling tower was proposed. Moreover,numerical simulation was performed. The results show that,after the windbreak walls were installed,the flow field inside and outside the tower has been significantly improved,which can effectively reduce the crosswind＇s effect. At crosswind speed of 12 m / s,the radiation efficiency increased with the crosswind velocity.
出处
《热力发电》
CAS
北大核心
2015年第3期104-108,共5页
Thermal Power Generation
基金
东北电力大学博士科研启动基金项目(BSJXM-201207)
关键词
小型间接空冷塔
侧风
挡风墙
散热效率
温差
数值模拟
small size indirect cooling tower
crosswind
windbreak wall
radiation efficiency
temperature difference
numerical simulation
