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分别建立了大型间接式空冷机组凝汽器热力计算模型和空冷塔特性模型,利用数值模拟软件Fluent完成了数值模拟.提出了一种机组冷端系统耦合迭代的模拟方法,对凝汽器和空冷塔的热力性能进行迭代计算,可对机组冷端系统进行变工况特性分析.以某600MW间接空冷机组为对象进行了算例分析,验证了所提方法的正确性,还分析了环境温度和侧风风速对整个机组冷端系统运行特性的影响关系,研究表明外界环境参数变化时,机组冷端系统具有一定的自平衡能力.
The thermodynamic calculation model and the air-cooling tower characteristic model of the large indirect indirect air-cooling unit condenser are established respectively, and the numerical simulation software Fluent is used to complete the numerical simulation. A simulation method of coupling iteration of the cold end system of the unit is proposed, Tower thermal performance iterative calculation can be carried out on the cold end of the unit variable behavior characteristics of a 600MW indirect air-cooled units as an example of an example analysis to verify the accuracy of the proposed method is also analyzed the ambient temperature and The effect of crosswind wind speed on the operating characteristics of the cold end system of the whole unit was studied. The results show that the cold end system of the unit has some self-balancing ability when the external environment parameters change.