基于水力模型的无收益水量分配方法

Method of Non-revenue Water Allocation Based on Hydraulic Model

无收益水量的合理分配对管网模型计算精度影响较大。为了尽可能真实地反映节点实际用水量,基于供水管网的一致漏损模型,将无收益水量分为真实漏损和表观漏损两部分,在原有管长影响因素的基础上增加考虑了压力及流量,提出了漏失模型法的流量分配方法,并以天津市H区给水管网模型为例进行了计算验证。结果表明,对于沿线流量分配法与漏失模型法两种流量分配方法,其压力监测点处的模拟值在每个时刻与实测值的误差均在±2m之内;二者水力计算所得的节点压力相差约0.2m,漏失模型法的流量分配结果明显更靠近监测点的实测值,精度较高。

Whether the non-profit water quantity can be allocated reasonably has a great influence on the calculation accuracy of the pipeline network model.In order to reflect the actual water consumption of nodes as much as possible,based on the consistent leakage model of water supply network,this paper divides the non-profit water into two parts:the real leakage and the apparent leakage.On the basis of the influencing factors of the original pipe length,the pressure and flow are considered,and the flow distribution method of leakage model method is put forward.The model of water supply network in the H District of Tianjin is verified by calculation.The results show that for the two methods of flow distribution,the error of pressure between the simulated value and the measured value at each time is within(±2 m);The difference between the node pressure calculated by hydraulic calculation of the two methods is about 0.2 m;The result obtained by the leakage model method is much closer to the measured value of the monitoring point.Therefore,the method of non-profit water allocation based on leak model has high accuracy.