长岭县中心城区燃气管网优化设计研究

发布时间：2018-09-06 08:44

【摘要】：城市燃气管网系统是城市市政基础设施的重要组成部分,为城市输送能源,燃气管网的运行安全与否直接关系着人民群众的日常生活。长岭县城中心城区燃气老旧管网比较多,由于经济上的原因,没有能力及时对老旧管网进行改造,许多管网带病运行,事故频繁,存在安全隐患。为提高管网的能源输送效率,消除管网系统安全隐患,加快城市燃气老旧管网改造,确保供气安全和节能,长岭县相继出台政策,对现状燃气老旧管网进行全面改造。本文在长岭县中心城区老旧管网改造的契机的基础上,结合长岭县燃气专项规划的修编,从科学预测用气量到合理布置管网,最后通过建立长岭县燃气管网优化的数学模型,确立了用遗传算法来优化燃气管网管径参数,利用MATLAB软件编写了相关的优化程序,并通过调用MATLAB遗传算法工具箱对整个中心城区燃气管网管径进行优化设计。本文结合前人在燃气管网优化方面研究的基础上,采用遗传算法作为燃气管网优化的基本思想,以使管网建设费用最少为目标函数,以管道的稳态分析为基础,通过各节点的流量、压力、管径及管道压力降等约束条件,建立了城市燃气管网针对管径参数优化的数学模型。并通过算例,以简单管网为对象通过计算机模拟试验进行了管径参数的优化配置,证明了模型建立的正确性。最后将此方法应用于长岭县燃气管网优化中,通过对实际工程的应用,本文解决了传统算法在燃气管网规划设计初期利用设计人员经验来进行预估管径而造成的规划不科学的问题,使燃气管网在规划设计层面上更加科学合理,对城市燃气管网规划设计工作的提高,提供了切实可行的解决办法。
[Abstract]:The urban gas pipeline network system is an important part of the urban municipal infrastructure. The operation safety of the gas pipeline network is directly related to the daily life of the people. There are many old gas networks in the city center of Changling County. Because of economic reasons, there is no ability to transform the old pipe networks in time. Many of them run with diseases and accidents frequently, and there are hidden dangers of safety. In order to improve the energy transmission efficiency of the pipe network, eliminate the hidden dangers of the network system, speed up the transformation of the old urban gas pipe network, and ensure the safety and energy saving of the gas supply, Changling County has issued policies one after another to carry out comprehensive transformation of the existing old and old gas pipeline network. On the basis of the turning point of the old and old pipe network transformation in the central district of Changling County, combined with the revision of the Changling County Gas Special Plan, this paper, from scientifically predicting the gas consumption to reasonably arranging the pipe network, finally establishes the mathematical model for the optimization of the Changling gas pipeline network. In this paper, genetic algorithm is used to optimize pipe diameter parameters of gas pipeline network. Relevant optimization program is compiled by MATLAB software, and the pipe diameter of gas pipe network in central city is optimized by calling MATLAB genetic algorithm toolbox. On the basis of previous researches on gas pipeline network optimization, genetic algorithm is adopted as the basic idea of gas pipeline network optimization. The objective function is to minimize the construction cost of the pipeline network, and the steady state analysis of the pipeline is taken as the basis. A mathematical model for optimization of pipe diameter parameters of urban gas pipe network is established through the constraints of flow rate, pressure, pipe diameter and pressure drop of each node. The optimization configuration of pipe diameter parameters is carried out by computer simulation test, and the correctness of the model is proved. Finally, this method is applied to the optimization of gas pipe network in Changling County. This paper solves the problem of unscientific planning caused by using the experience of designers to estimate pipe diameter in the early stage of gas pipeline network planning and design, which makes the gas pipeline network more scientific and reasonable in the level of planning and design. A feasible solution is provided for the improvement of urban gas pipe network planning and design.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU996.62

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