變流量空調系統冷水管網水力動態響應特性研究
Hydraulic dynamic response characteristics of chilled water pipe network in variable flow air conditioning system
摘要：
在變流量空調系統冷水管網的“質-量”調節過程中，工質的流量、溫度等參數具有明顯的滯后響應特性，加劇了水力、熱力工況不平衡及控制環路耦合的現象。本文主要針對冷水管網的水力動態響應特性進行了建模及仿真研究，結合流體瞬變過程及圖論理論，深入分析了管網本構參數與水力響應時間尺度的關系，基于真實的試驗系統對仿真模型進行了驗證。結果表明，動態仿真模型具有較高的準確性，可用于仿真變流量空調系統水力滯后特性，能夠為后續的解耦優化、算法優化等提供理論支撐。
Abstract：
In the process of the quality-quantity regulation of the chilled water pipe network in variable flow air conditioning system, the medium flow rate and temperature have obvious delay response characteristics, which aggravates the hydraulic and thermal imbalance, and intensifies the coupling properties of control loops. This paper studies the hydraulic dynamic response characteristics of the pipe network by modeling and simulating, combined with the fluid transient process and the graph theory, deeply analyses the relationship between the pipe network constitutive parameters and the hydraulic response time scale, and verifies the accuracy of the simulation model based on a real test system. The results show that the dynamic simulation model has high accuracy and can be used to simulate the hydraulic delay characteristics of the variable flow air conditioning system, which provides theoretical supports for the follow-up research on decoupling control and algorithm optimization.
Keywords:variableflowairconditioningsystem;chilledwaterpipenetwork;hydrauliccharacteristic;dynamicresponse;hydraulicresponsetime;graphtheory