| 沈凡卉,徐振,杨光俊,郝天明.基于风洞实验的冷却塔空腔区范围影响因素研究[J].装备环境工程,2019,16(6):72-77. SHEN Fan-hui,XU Zhen,YANG Guang-jun,HAO Tian-ming.Influencing Factors of Cavity Area of Cooling Tower Based on Wind Tunnel Experiment[J].Equipment Environmental Engineering,2019,16(6):72-77. |
| 基于风洞实验的冷却塔空腔区范围影响因素研究 |
| Influencing Factors of Cavity Area of Cooling Tower Based on Wind Tunnel Experiment |
| 投稿时间：2019-01-31 修订日期：2019-06-25 |
| DOI：10.7643/ issn.1672-9242.2019.06.012 |
| 中文关键词: 烟塔合一 风洞实验 空腔区 冷却塔形状 |
| 英文关键词:cooling tower with flue gas injection wind tunnel experiment cavity area the shape of cooling tower |
| 基金项目: |
|
|
| Author | Institution |
| SHEN Fan-hui | State Power Environment Protection Research Institute Co., Ltd, Nanjing 210031,China |
| XU Zhen | State Power Environment Protection Research Institute Co., Ltd, Nanjing 210031,China |
| YANG Guang-jun | State Power Environment Protection Research Institute Co., Ltd, Nanjing 210031,China |
| HAO Tian-ming | State Power Environment Protection Research Institute Co., Ltd, Nanjing 210031,China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 基于火电厂采用“烟塔合一”排烟方式时可能由于污染物下洗造成“空腔区”内地面高浓度等问题，分析空腔区范围，以科学设置环境防护距离。方法 采用相似理论，将10个“烟塔合一”火电厂及地形按几何比缩小至风洞实验室内，通过测量冷却塔后方湍流度，并对比背景湍流度的方法，分析不同冷却塔形状以及不同下垫面条件下冷却塔空腔区的尺寸。结果 空腔区的高度、宽度与冷却塔高宽比存在正相关性，山地地形更有利于湍涡耗散，而使空腔区范围较平坦地形更小，厂区内大型建筑物位置会对冷却塔空腔区的范围产生影响。试验分析得出，冷却塔空腔区范围基本在冷却塔高度的2倍以内，高宽比越大，则空腔区范围越小，地形越复杂，空腔区范围越小。结论 火电厂采用“烟塔合一”排烟方式时，建议优先选择高宽比大的塔型，以降低排烟冷却塔对周围环境影响的可能性。 |
| 英文摘要: |
| Objective To analyze the range of the cavity area for setting the environmental protection distance scientifically in view that thermal power plant which use the “cooling tower with flue gas injection” may have the high concentration of the ground in the "cavity area" which caused by the downwash of the flue gas. Methods With the similar theory, 10 thermal power plants model with “cooling tower with flue gas injection” were shrank into the wind tunnel laboratory, and the method of measuring and comparing the turbulence and background turbulence was used to get the size of cavity area of the cooling tower with different shapes and underlying surface conditions. Results There was a positive correlation between the height and width of the cavity area and the aspect ratio of the cooling tower. In addition, the mountainous terrain was more favorable for the vortex dissipation, so that the cavity area was smaller than the flat terrain. The position of large buildings in the plant could affect the range of the cavity area of cooling tower. The cavity area of the cooling tower was basically within 2 times of the height of the cooling tower. The larger the aspect ratio was, the smaller the range of the cavity area was. Conclusion It is recommended to give priority to the use the “cooling tower with flue gas injection” of large aspect ratio for thermal power plants to reduce the possibility of the flue gas affecting the surrounding environment. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
