多热源环状管网的面向对象水力计算方法

Analysis of multi-sources looped-pipe network based on object-oriented methodology

提出用于多热源环状管网的水力工况模拟的面向对象水力计算新方法.将复杂的管网结构解析成各类元件对象的集合,每个对象在连接处的水力特性作为与其相接元件的边界条件.每个管网元件的对象属性包含了管网的拓扑结构关系,并提供水力计算中所需的参数.基于新方法建立管网管段、水泵、阀门、热源等元件模型,在水力计算时无需提供特定的初始值,即可快速、可靠地定量分析设备操作、热媒温度和地形高差等对水力计算结果的影响.以某市区域供热管网为例,进行设计工况和事故工况的水力计算分析.分析结果表明,"顺流向"的计算顺序能够遍历管网中的所有元件对象,且快速、准确地求解管网的水力工况.

A new method based on object oriented （00） method was proposed to be applied in hydraulic simulation of looped-pipeline network with multiple heat sources. A looped-pipeline network was designed to be described as a collection of element objects. The hydraulic characteristics at the connecting surfaces of objects were considered as boundary conditions. Network topology information and calculating parameters were included in every element object established. The mathematical models of the element objects, as pipe, pump and valve as well as heat source were established based on hydraulic conservation equations. The fluencies of valve/pump operation, hot water temperature and altitude differences on the hydraulic balance or non-steady state could he precisely simulated with no particular initial values preset. A case of district heating pipeline network was analyzed on normal condition and faulted condition. Results indicate that the new method can quickly traverse all the element objects in the loop pipeline network with multiple heat sources and accurately solve the hydraulic analysis.