Hydraulic dynamic response characteristics of chilled water pipe network in variable flow air conditioning system

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.