变流量三级泵系统控制方式  

Control methods of variable volume triple-stage pump system

作　　者：闵晓丹[1] 戎向阳[1] 刘希臣[1] 司鹏飞[1] Min Xiaodan;Rong Xiangyang;Liu Xichen;Si Pengfei(China Southwest Architectural Design & Research Institute C o .,L t d .)

机构地区：[1]中国建筑西南设计研究院有限公司

出　　处：《制冷与空调》2016年第6期91-95,共5页Refrigeration and Air-Conditioning

基　　金：国家十二五科技支撑计划(2011BAJ03B12-3)

摘　　要：建立一个简化的变流量三级泵系统模型,对其典型部分负荷下的水力工况进行模拟分析,研究在不同控制方式下管网的水力特性。结果显示:二级泵的控制方式决定三级泵支路间的干扰程度,三级泵的控制方式决定变化支路内部的流量分配方式;二级泵采用干管压差控制,三级泵采用末端压差控制的系统稳定性最好;二级泵的能耗主要受二级泵控制方式的影响,三级泵的能耗受二三级泵控制方式的共同影响。O n e simplified m odel of variable vol u m e triple-stage p u m p system is set u p ,and the simulation analysis on hydraulic regime under typical part load condition is conducted? in order to study the hydraulic characteristics of pipe network under different controlm o d e s . T h e results s h o w that the interference degree a m o n g the triple-stage p u m p branches is determinedby the control modes of secondary p u m p , a n d the flow distribution of internal branchesis determined by the control modes of triple-stage p u m p . T h e main pipe under pressure differencecontrol of secondary p u m p and the end pipe under pressure difference control of triple-stage p u m pcan get the best stability. T h e secondary p u m p ^ s energy consumption is greatly affected by thecontrol m o d e of secondary p u m p , a n d the energy consumption of triple-stage p u m p are affected by the control m o d e of both triple-stage p u m p and secondary p u m p .

关 键 词：三级泵 变流量 压差控制 流量分配 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]