火电厂间接空冷塔导风板数值研究

发布时间：2018-07-17 03:23

【摘要】：在火电厂中,环境风的速度和方向皆会对间接空冷塔的冷却性能产生重要影响,本文为了研究环境自然风对火电厂间接空冷塔冷却性能的影响,建立空冷塔入口处导风板的温度场和动力场三维数值计算模型,采用SRF模型模拟导风板旋转,对塔内空气动力场及温度场进行三维数值模拟,获得了相应的速度场和温度场。将数值模拟与实验结果进行对比,得到侧风下导风板数量及旋转速度对间接空冷塔的冷却性能影响规律。研究表明,不加导风板,在5 m/s风速下,空冷塔冷却性能严重恶化,设置8块导风板后,换热量可提高1 5.08%,并且将导风板旋转后,换热量可以进一步提高,换热量随着旋转速度的增加呈现先减小后增大的趋势。
[Abstract]:In the thermal power plant, the speed and direction of the ambient wind will have an important impact on the cooling performance of the indirect air-cooled tower. In order to study the influence of the natural wind on the cooling performance of the indirect air-cooled tower in the thermal power plant, Three dimensional numerical model of temperature field and dynamic field of air cooling tower entrance guide plate is established. SRF model is used to simulate the rotation of air guide plate. The aerodynamic field and temperature field in tower are simulated by three dimensional numerical simulation, and the corresponding velocity field and temperature field are obtained. By comparing the numerical simulation with the experimental results, the effects of the number of the guide plates and the rotation speed on the cooling performance of the indirect air-cooled tower are obtained. The results show that the cooling performance of the air cooling tower deteriorates seriously under the wind speed of 5 m / s without the air guide plate. The heat transfer can be increased by 15. 08 after 8 air guide plates are installed, and the heat transfer can be further improved after the wind guide plate is rotated. With the increase of rotation speed, the heat transfer shows a tendency of decreasing first and then increasing.
【作者单位】：中国矿业大学电力工程学院;
【基金】：中央高校基本科研业务费专项资金(No.2015XKMS059) 江苏省2013年度研究生教育教学改革研究与实践课题(No.JGLX13_105) 中国矿业大学大学生创新创业基金资助大学生创新项目
【分类号】：TM621

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