变流量条件下异程式管网定量化设计研究

Design of Direct Return Pipe Network under Variable Flow

本文以异程式变流量水系统为研究对象,在实验的基础上,提出了管网设计定量化的性能评价指标——支路压降比φ。以管网水力稳定性为前提,分析在变流量运行条件下,如何设计管网系统以保证系统动态运行稳定性。实验结果表明:支路压降比φ取值宜在(0.45,0.56)区间。

Taking direct return variable flow water system as research object,the performance evaluation index of quantitative network design branch voltage ratioφwas put forward on the basis of experiments.This paper analyzes how to design the pipe network system to ensure the stability and reliability of the system under the condition of variable flow operation based on the hydraulic stability of the terminal branches.The results show that while the branch voltage ratioφrange from 0.45 to 0.56,with the variable flow operation of the pipe network system,each branch can still maintain a better dynamic hydraulic balance,and the overall stability of the network system is better.