排烟冷却塔的一维热力计算数学模型

1-D Thermodynamic Computation Model for Natural Draft Cooling Towers

文章建立了排烟冷却塔的一维热力计算数学模型,分析了烟气的排入对冷却塔内的气流速度、通风量、气流阻力、空气干球温度以及冷却塔的冷却性能等方面的影响,并与普通冷却塔的热力计算进行了比较分析。工程实例计算结果表明:烟气的排入将使冷却塔出口的混合气体温度增高、冷却塔的抽力和通风量增大,有利于提高冷却塔的冷却效果;当烟气的相关参数置为0时,该模型与普通冷却塔模型的计算结果一致,表明此模型具有良好的通用性。

One dimensional thermodynamic computation model of naturaldraft cooling tower is developed. It is used in analyzing the effects of flue gas on air flow speed, air volume, flow resistance, and dry bulb temperature of the air inside cooling tower, as well as cooling performance. Comparisons to thermodynamic calculations of conventional cooling towers are also performed. Engineering case study show that flue gas raises mixed gas temperature at exit and increases suction power and air volume of the tower, resulting in enhanced cooling performance. When flue gas related parameters are set to 0, computation results agree with conventional cooling tower results, meaning it has good generality.