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利用Fluent软件,以国内某600 MW直接空冷机组为例,对迎风侧2个相邻空冷凝汽器进行了数值模拟,得到了不同环境横向风速下空冷凝汽器的传热效率随着风速的增大而降低,而且被环境风冲刷越严重的凝汽器受影响程度越大的结论.针对横向风对空冷凝汽器传热效率的影响,在凝汽器挡风墙下延方向加装了防风网.对加装防风网后的空冷凝汽器进行了数值模拟,分析了防风网的不同结构参数(开孔率、高度)对空冷凝汽器传热效率的影响,结果表明:在加装防风网后凝汽器传热效率显著提高,防风网的结构参数对其防风效果有明显影响,为直接空冷机组的防风网改造提供了理论依据.
Using Fluent software and taking a domestic 600 MW direct air-cooled unit as an example, two adjacent air-cooled condensers on the windward side were numerically simulated, and the heat transfer efficiency of air-cooled condenser with different horizontal wind speeds was obtained. Increase and decrease, and the more serious impact of environmental wind erosion of the condenser is more affected.For the transverse wind on the air-cooled condenser heat transfer efficiency, the installation direction of the condenser wind wall extension The wind-proof net was installed.The numerical simulation of the air-cooled condenser with wind-proof net was carried out.The influence of different structural parameters (aperture and height) of the wind-proof net on the heat transfer efficiency of air-cooled condenser was analyzed.The results showed that The heat transfer efficiency of the condenser increases significantly after the windbreak is installed, and the structural parameters of the windbreak have a significant influence on the windbreak effect, providing a theoretical basis for the windbreak reconstruction of the direct air-cooled unit.