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首页> 外文期刊>Journal of food engineering >Optimum surface area distribution in co-current multiple-effect evaporator
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Optimum surface area distribution in co-current multiple-effect evaporator

机译：并流多效蒸发器的最佳表面积分布

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Multiple-effect evaporator is used to increase the cohcentration of a solution in a series of pressure vessels. If the total surface area of the evaporator is fixed, the performance of the evaporator is affected by the distribution of surface area among vessels. Previous studies have been concerned with optimization of surface area distribution with the assumption that no fouling occurs. The present study considers a more realistic case when the last-effect vessel is subjected to fouling. The model of multiple-effect evaporator yields a system of nonlinear equations. Specified parameters are pressures and juice concentrations at inlet and outlet of the evaporator. The solution obtained from an iterative procedure is used to compute two objective functions, which are maximized at different optimum surface area distributions. Given a known rate of fouling, it is shown quantitatively how much the area of the last-effect vessel must be increased relative to the areas of the other vessels in order to achieve the maximum overall steam economy or the maximum amount of input to the evaporator. (C) 2015 Elsevier Ltd. All rights reserved.
机译：多效蒸发器用于增加一系列压力容器中溶液的浓度。如果蒸发器的总表面积固定，则蒸发器的性能会受到容器之间表面积分布的影响。先前的研究一直在假设没有结垢的情况下优化表面积分布。本研究认为，当最后作用的船舶受到污染时，将是一个更现实的情况。多效蒸发器模型产生了一个非线性方程组。指定的参数是蒸发器入口和出口的压力和果汁浓度。从迭代过程中获得的解决方案用于计算两个目标函数，它们在不同的最佳表面积分布下会最大化。给定已知的结垢率，定量显示最后作用容器的面积必须相对于其他容器的面积增加多少，以实现最大的整体蒸汽经济性或向蒸发器的最大输入量。 （C）2015 Elsevier Ltd.保留所有权利。

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