暖通空调分布式自适应管网特性研究

发布时间：2018-03-14 18:14

本文选题：传统管网输配系统　切入点：分布式输配管网系统　出处：《西南科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：针对传统管网输配系统阀门节流而产生大量无用电耗的问题,以变频水泵代替支路调节阀门的管网设计方法,即分布式输配管网系统,已经越来越受到工程设计人员的关注。本课题依托工程案例的理论数据对分布式输配管网系统进行了相关探究与分析。本文首先以供热系统模型为基础对分布式变频系统的类型和特点进行了计算上的对比分析,得出每类模型的共性和特性,利用图论理论分析供热管网的拓扑结构,根据管网矩阵方程推导出分布式变频系统的矩阵方程。总结了分布式输配管网主要中分布式多级泵系统和分布式多级混水泵系统的分类和设计计算。通过引用分布式输配管网的工程实例,在Flowmaster上建立分布式多级泵系统模型,从设计和运行角度分析了分布式输配管网相较于传统输配管网在各稳态模拟结果中各参数表现的差异,同时根据模拟分析,对比了零压差点位置的不同各分布式输配管网系统相较于传统输配管网的能耗节约量和节能幅度。结合经济性分析,选出最优方案。在最优方案的基础上搭建分布式多级混水泵系统,比较分析分布式二级泵系统与分布式二级混水泵系统的优劣。以分布式变频系统实际运行中存在的问题为切入点,利用软件分别对分布式二级混水泵系统和传统管网系统的多种调节过程进行了动态仿真模拟,通过瞬态的模拟对比分析两者运行调节时水力、热力特性的差异,总结分布式变频系统运行调节的优势,探究分布式多级混水泵系统在各工况下的自适应性。对分布式二级混水泵系统进行热源水泵事故工况的动态仿真模拟,总结了该系统应对该种事故时的优势和特点。
[Abstract]:In order to solve the problem that the valve throttling of the traditional pipeline network system produces a large amount of useless electricity consumption, the design method of the pipe network with variable frequency pump instead of the branch regulating valve is called distributed transmission and distribution network system. More and more attention has been paid by engineering designers. Based on the theoretical data of engineering cases, this paper makes a related research and analysis on distributed transmission and distribution network system. Firstly, based on the heat supply system model, this paper makes a research on distributed distribution network system. The types and characteristics of frequency conversion system are compared and analyzed in calculation. The generality and characteristics of each model are obtained, and the topological structure of heating network is analyzed by using graph theory. According to the matrix equation of pipe network, the matrix equation of distributed frequency conversion system is derived. The classification and design calculation of distributed multistage pump system and distributed multistage mixing pump system in distributed transmission and distribution network are summarized. Engineering example of Distribution Distribution Network, The distributed multistage pump system model is established on Flowmaster. The differences of parameters in the steady state simulation results of distributed transmission and distribution network are analyzed from the point of view of design and operation. Compared with the traditional transmission and distribution network, the energy saving and energy saving range of different distributed transmission and distribution network systems with zero pressure difference points are compared. Based on the optimal scheme, a distributed multistage water pump system is built. The advantages and disadvantages of distributed two-stage pump system and distributed two-stage mixed pump system are compared and analyzed. In this paper, the dynamic simulation of various regulation processes of the distributed two-stage water pump system and the traditional pipe network system is carried out by using the software, and the differences of the hydraulic and thermodynamic characteristics between the two systems are analyzed by the transient simulation. This paper summarizes the advantages of distributed frequency conversion system in operation regulation, probes into the self-adaptability of distributed multistage mixing pump system under various working conditions, and simulates the dynamic simulation of distributed two-stage mixing pump system under the accident condition of heat source pump. The advantages and characteristics of the system in dealing with this kind of accident are summarized.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU83

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