机械通风冷却塔变工况特性理论研究

发布时间：2018-01-15 17:16

本文关键词：机械通风冷却塔变工况特性理论研究　出处：《汽轮机技术》2017年05期 　论文类型：期刊论文

【摘要】：基于麦克尔焓差理论和机械通风冷却塔的特点,推导了一种进出塔水温计算的方法,通过该计算方法对机械通风冷却塔的变工况特性进行了研究。结果表明:海拔高度对进出塔水温的影响可忽略不计;湿球温度与进出塔水温线性正相关,进出塔水温之差与湿球温度无关;循环水量升高,则出塔水温升高,入塔水温降低,进出塔水温之差不断减小;风机风量升高,则进出塔水温降低,进出塔水温之差保持不变。最后结合现场试验实测结果,提出了冷却塔性能修正系数。根据这些结论和性能修正系数可更准确预测进出塔水温,从而优化冷却塔运行。
[Abstract]:Based on the theory of enthalpy difference of Michael and the characteristics of mechanical ventilation cooling tower, a method for calculating the water temperature of the inlet and outlet tower is derived. The characteristics of mechanical ventilation cooling tower under different working conditions are studied by this method. The results show that the influence of altitude on the water temperature in and out of the tower is negligible. The wet bulb temperature was positively correlated with the water temperature of the inlet and outlet tower, and the difference between the water temperature of the inlet and outlet tower was not related to the wet bulb temperature. With the increase of circulating water quantity, the water temperature of the outlet tower increases, the water temperature of the inlet tower decreases, and the difference of the water temperature of the incoming and outgoing tower decreases continuously. If the fan air volume increases, the water temperature of the inlet and outlet tower will decrease, and the difference of the water temperature of the inlet and outlet tower will remain unchanged. Finally, the field test results will be combined. Based on these conclusions and the performance correction coefficient, the water temperature of the inlet and outlet tower can be predicted more accurately and the operation of the cooling tower can be optimized.
【作者单位】：华北电力大学能源动力与机械工程学院;河北省电力研究院;
【分类号】：TM62
【正文快照】： 0前言机械通风冷却塔具有投资低、建设工期短等优势,被高温、高湿地区的中小型电厂广泛采用,同时也大量应用于冶金、化工等行业[1,2]。冷却塔作为电厂热力循环中不可缺少的冷端设备,其性能一定程度上决定了循环水的温度,而凝汽器真空与循环水温密切相关,因此冷却塔的可靠运行

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