摘要
以湿冷机组自然通风冷却塔相关理论为基础,借助于CFD模拟软件,建立了火电机组湿式冷却塔的传热传质模型,主要的换热区域如填料、雨区和喷淋区采用离散相模型。由于冬季气温较低和塔内的换热不均,在冷却塔的填料下面、进风口处、基环面容易结冰,提出了在进风口处加装挡风板的方案,数值模拟分析结果显示,该方案改善了塔内温度场,有效的防止了塔内结冰。
Based on the relative theorise of the wet cooling tower, this simulation builds the heat and mass transfer model through CFD. The main heat transfer area, such as trdlers, rain and spray zone discrete phase model. As the air temperature is low in winter and the heat transfer is uneven in the tower, the water is easy to freeze below the packing of the cooling tower, at the air inlet and on the base torus. A method is presented that a wind shield is installed at the air inlet, numerical simulation results show which improves the temperature field in the tower and effectively prevents freezing.
出处
《应用能源技术》
2011年第11期44-48,共5页
Applied Energy Technology
关键词
冷却塔
挡风板
数值模拟
离散相模型
Cooling tower
Windshield board
Numerical simulation
Discrete phase model
