区域供冷供热系统输配管网管径优化设计研究
Optimal design of pipe diameters for distribution pipe networks of district cooling and heating systems
摘要：
建立了以全管网寿命周期费用年值为目标函数的区域供冷供热系统管径优化模型，提出了对最不利环路和其他分支环路各管段管径进行综合优化的方法。编制了管径优化设计程序，并利用该程序对某工程实例进行了优化设计，与传统工程设计法相比全寿命周期费用年值减少了7.38%。结果表明，优化方法能够更好地平衡管网的初投资和运行费用，提高管网经济性，具有较好的社会经济效益和设计指导意义。
Abstract：
Establishes an optimization model of the pipe diameter of the district cooling and heating system with the annual value of the life cycle cost of the entire pipe network as the objective function. Proposes a method to comprehensively optimize the pipe diameters of the most unfavorable loop and other branch loops. Develops an optimized design program and uses the program to optimize the design of an engineering example. Compared with the traditional economic specific friction method, the annual equivalent cost of whole life cycle is saved by 7.38%. The results show that the optimization method can better balance the initial investment and operation cost of the pipe network, improve the economy of the pipe network, with better social and economic benefits and design guidance significance.
Keywords:pipe diameter optimization, district cooling and heating system, tree-shaped pipe network, annual equivalent cost, hourly load