变流量空调水系统稳定性的定量评价  

Quantitative evaluationon stability of variable water volume air-conditioning system

作　　者：孟庆龙 王文强[1] 郭雪丽 常赛南 谷雅秀 MENG Qinglong;WANG Wenqiang;GUO Xueli;CHANG Sainan;GU Yaxiu(Chang′an University,Xi′an 710061,China;School of Environmental Science and Engineering,Chang′an University,Xi′an 710054,China.)

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]长安大学环境科学与工程学院,陕西西安710054

出　　处：《西安建筑科技大学学报（自然科学版）》2019年第3期432-439,446,共9页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金(51208059);陕西省自然科学基础研究计划自然科学基金(2018JM5084);长安大学中央高校基本科研业务费专项资金资助(300102289103)

摘　　要：以一次泵变流量水系统为研究对象,实验研究了无压差控制和定压差控制下变流量空调水系统的水力稳定性.建立了相应的TRNSYS仿真模型,仿真研究了变压差控制下水系统的水力稳定性.结果表明:对于提高系统水力稳定性和节能效益,变压差控制策略效果显著.变压差控制下管网的水力失调系数为0.072,较无压差控制时减小了0.442;关闭任一支路阀门,变压差控制下冷冻水泵节能可达到27.1%.Taking the primary variable displacement water system as the research object,the hydraulic stability of the variable flow air conditioning system under none-pressure control and constant pressure difference control was experimentally studied.The corresponding TRNSYS simulation model was established and the hydraulic stability of the water system under variable pressure difference control was simulated.The results show that the effect of variable pressure differential control strategy is significant for improving the hydraulic stability and energy saving efficiency of the system.The hydraulic imbalance coefficient of the pipe network under variable pressure difference control is 0.072,which is 0.442 when compared with no pressure difference control.When the valve of any branch is closed,the energy saving of the frozen water pump under variable pressure difference control can reach 27.1%.

关 键 词：空调水系统 水力稳定性 压差控制 TRNSYS 节能 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]