融合水夹点分析的具有中间水道用水网络设计

Design of Water-Using Network with Single Internal Water Main Based on Water Pinch Analysis

为了快速有效地进行具有中间水道的用水网络设计,提出了基于水夹点分析的用水网络设计方法。水夹点分析基于对用水过程中使用新鲜水或回用水的指导,获得初始中间水道浓度估计值并给出中间水道中水分配的基本规则。首先根据水夹点浓度确定中间水道杂质浓度,并对用水单元进行分组,安排用水单元在用水网络中的位置,然后优化中间水道水流量,确定最优用水网络结构。水夹点分析提供具有中间水道初始用水网络结构,降低数学优化求解的规模和难度,所提夹点设计方法简捷易行。2个实例的计算结果表明,所提出的方法比简单的夹点分析和节水因子方法可分别节水2.56%和7.58%。

A design method based on water pinch analysis is presented to design water-using networks with single internal water main quickly and effectively.The water pinch analysis obtains the concentration of initial internal water main and provides water allocation rules flowing in and out internal water main based on directing water-using units to use fresh water or reused water.The internal water main is formed according to water pinch concentration values,then the water-using units are grouped and arranged at different positions in the water-using network.The final structure of the water network is determined through optimizing the water volume of the internal water main.The water pinch analysis provides an initial structure of a water-using network and reduces the scale and difficulty of mathematical optimization.The presented method is simpler and easier for use.The results obtained from two examples and the comparisons with simple water pinch analysis method and the water saving factor method show that the presented method saves fresh water consumption by 2.56% and 7.58%,respectively.