多热源多环供热管网水力建模与实验研究

Hydraulic Modeling and Experimental Study of Multi-Heat Source and Multi-Ring Heating Networks

为了进一步研究多热源多环集中供热管网水力特性,基于流体网络分析法,针对公共管道上是否存在用户,以及存在用户时是否存在水力交汇用户的不同情况,提出公共管道断开省略、两端点设置虚拟用户或虚拟热源等相应的建模方法。通过已搭建的多热源多环供热管网实验台,分别对3种不同工况单热源双环、双热源双环变工况、三热源三环理想工况进行建模仿真和实验研究,并在考虑仪表测量误差的基础上进行误差分析。结果发现,在3种工况下,仿真数据与实验数据的相对误差绝对值的最大值分别为1.96%、3.60%和1.00%,验证了该仿真模型的有效性和准确性,进而证明了建模方法的合理性和适用性。

To further study the hydraulic characteristics of multi - heat source central heating networks, this paper, based on the fluid network analysis, aiming at whether there are users on common pipes, as well as hydraulic intersection users,proposes corresponding hydraulic modeling method, including the disconnection and omission of the common pipes,setting up virtual users or virtual heat source at two end points. Besides,an experimental network and its hydraulic model are both established, and the simulated and experimental researches of three different hydraulic conditions are carried out respectively, which are the variable condition single heat source and double rings, the variable condition double heat sources and double rings and the ideal condition of three heat sources and three rings. And the error analysis based on the measurement error of the instrument is carried out. The results finally found that in these three conditions,the maximum value of the relative error,s absolute value of the simulation data and the experimental data is 1. 96%, 3. 60% and 1% respectively. The validity and accuracy of the simulation model are verified, and the rationality and applicability of the modeling method are also proved.