Abstract In the sugar juice evaporation process, the temperature of incoming juice is raised to the boiling point, and the water content of the juice is reduced by evaporation. The main process outputs are raw sugar and molasses. Heat transfer coefficients are important parameters in the simulation of this process. Due to scaling, the values of heat transfer coefficients decrease over time, and cleaning must be carried after a certain period of operation. Although correlations of heat transfer coefficients and recommended values of scaling rates are available in the literature, there are uncertainties in their values. Therefore, reliance on these correlations to predict when an evaporator station requires cleaning may be in error. In this paper, a method of online determination of heat transfer coefficients and scaling rates using measured values of process parameters is presented. Testing of this method indicates that it can produce accurate values of heat transfer coefficients and scaling rates despite possible errors in input data.

中文翻译：

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糖汁蒸发过程传热系数的在线测定

摘要 在糖汁蒸发过程中，将进料温度升高到沸点，通过蒸发降低糖汁的含水量。主要的过程输出是原糖和糖蜜。传热系数是该过程模拟中的重要参数。由于结垢，传热系数值随时间降低，运行一定时间后必须进行清洁。虽然传热系数和推荐的结垢率值的相关性在文献中是可用的，但它们的值存在不确定性。因此，依赖这些相关性来预测蒸发站何时需要清洁可能是错误的。在本文中，提出了一种使用过程参数的测量值在线确定传热系数和结垢率的方法。对该方法的测试表明，尽管输入数据可能存在错误，但它仍可以产生准确的传热系数和缩放率值。