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| Influencing Factors of Cavity Area of Cooling Tower Based on Wind Tunnel Experiment |
| Received:January 31, 2019 Revised:June 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.06.012 |
| KeyWord:cooling tower with flue gas injection wind tunnel experiment cavity area the shape of cooling tower |
| Author | Institution |
| SHEN Fan-hui |
State Power Environment Protection Research Institute Co., Ltd, Nanjing ,China |
| XU Zhen |
State Power Environment Protection Research Institute Co., Ltd, Nanjing ,China |
| YANG Guang-jun |
State Power Environment Protection Research Institute Co., Ltd, Nanjing ,China |
| HAO Tian-ming |
State Power Environment Protection Research Institute Co., Ltd, Nanjing ,China |
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| Abstract: |
| 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. |
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