Model for fouling deposition on power plant steam condensers cooled with seawater: Effect of water velocity and tube material
Model for fouling deposition on power plant steam condensers cooled with seawater: Effect of water velocity and tube material
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DOI：
10.1016/j.ijheatmasstransfer.2007.01.022
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发表时间：
2007-08
影响因子：
5.2
通讯作者：
E. Nebot;J. Casanueva;T. Casanueva;D. Sales
中科院分区：
文献类型：
--
作者：
E. Nebot;J. Casanueva;T. Casanueva;D. Sales
提出了一种预测污垢演变的动力学模型。本文提出的模型代表了污垢随时间的演变，并且是Konak [A. R. Konak，传热设备中污垢曲线的预测，Trans.Inst.Chem.Eng.51（1973）377]。建议的模型是一个组合的一阶方程和驱动力的概念采用Konak。它也是Verhulst在1839年提出的解释生物种群增长数据的经典Logistic方程的一个新的表达式。新模型的另一个优点是，其动力学参数、热阻的最大渐近极限（Rf∞）和达到最大值的速率（k）具有明确的物理意义。作为对模型性能的应用和验证，本文对流速和管壁材料对污垢沉积的影响进行了试验和模拟。可以得出结论，热阻的最大渐近极限随着速度的增加而减小。在应用模型之后，还可以得出结论，对于一年中的所有季节，钛管更容易被污染，尽管该过程比黄铜管慢。
A kinetic model for fouling evolution prediction is proposed. The model suggested in this paper represents fouling evolution versus time, and is a modification of the model defined by Konak [A.R. Konak, Prediction of fouling curves in heat transfer equipment, Trans. Inst. Chem. Eng. 51 (1973) 377]. The proposed model is a combination of the first order equation and the driving force concept employed by Konak. It is also a new expression of the classic logistic equation proposed by Verhulst in 1839 to interpret biological population growth data. The new model has the additional advantage that its kinetic parameters, the maximum asymptotic limit of the thermal resistance (Rf∞) and the rate at which that maximum value is reached (k), present a clear physical significance. As application and validation of the model performance, the effects of water velocity and tube material on fouling deposition have been tested and modeled. It can be concluded that the maximum asymptotic limit of the thermal resistance decreases as velocity increases. After the application of the model it can also be concluded that for all seasons of the year, titanium tubes are more prone to be fouled, although the process is slower, than with brass tubes.