多水源给水管网的技术经济计算

联立管网节点经济水压方程组并引入节点水压边界条件，建立包含起点水压已给和未给两种情况的多水源给水管网技术经济计算的数学模型。采用牛顿迭代法来求解各未知节点的经济水压，进而得出各管段的经济水头损失、经济管径和水源二级泵站的经济扬程。最后再将理论管径圆整为标准管径，并重新核算管网实际水力工况；据此编写了通用电算程序，经多水源给水管网实例验证，可快捷准确地进行技术经济计算，得出较满意的结果。

Techno-economic Calculation for Multi-sources Water Distribution Network

By combining the economic pressure equations for monitoring nodes of network and introducing the boundary conditions of node pressure to set up the mathematic model for making techno-economic calculation of multi-source water distribution network under the conditions that the pressure of some water sources is known and some is unknown. The Newton iteration method is used to solve the economic pressure on the unknown node, so as to calculate the economic head loss and economic pipe diameter of each section, and economic head of second-stage pump station. Finally, the theoretic pipe diameter is rounded-off to the standard diameter and then the hydraulic status of network is recalibrated. Based on which, the general-purpose computer software is programmed and is verified by the multi-source water distribution network. It can make techno-economic calculation in rapid and accurate way and give a satisfied result.