变流量空调系统冷水管网水力动态响应特性研究
摘要：在变流量空调系统冷水管网的“质-量”调节过程中，工质的流量、温度等参数具有明显的滞后响应特性，加剧了水力、热力工况不平衡及控制环路耦合的现象。本文主要针对冷水管网的水力动态响应特性进行了建模及仿真研究，结合流体瞬变过程及图论理论，深入分析了管网本构参数与水力响应时间尺度的关系，基于真实的试验系统对仿真模型进行了验证。结果表明，动态仿真模型具有较高的准确性，可用于仿真变流量空调系统水力滞后特性，能够为后续的解耦优化、算法优化等提供理论支撑。
关键词：变流量空调系统冷水管网水力特性动态响应水力响应时间图论
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[3] 张洁，潘毅群，刘熙.变风量空调系统静压设定值重置方法及控制策略研究[J].暖通空调，2011,41(12):50- 56.
[4] SUN R,LIU C,LIU R.Procedure for calculating building chilled and hot water differential pressure setpoint[C]//Advances in Intelligent Systems Research,2015:551- 554.
[5] SONG S W.An enhanced differential pressure reset control for a central heating system with a variable speed pump[C]//2nd Annual International Conference on Advanced Materials,Mechanical and Structural Engineering (AMMSE),2016:215- 218.
[6] SONG S W.Experimental study on differential pressure control for a central heating system with a variable speed pump[C]//2nd Annual International Conference on Advanced Materials,Mechanical and Structural Engineering (AMMSE),2016:211- 214.
[7] 裘舒年，李嘉劼，李铮伟，等.基于自校正水泵模型的空调系统冷水泵压差前馈-反馈控制方法[J].暖通空调，2019,49(11):50- 55.
[8] 华鹏敏，赵天怡，付朋，等.集中空调冷却水系统变流量控制算法适用性研究[J].暖通空调，2019,49(12):98- 103.
[9] 屈国伦，谭海阳.集中空调水系统变流量高效运行控制策略研究[J].暖通空调，2016,46(7):81- 86.
[10] ZHANG H,CAI L.Decentralized nonlinear adaptive control of an HVAC system[J].IEEE transactions on systems,man and cybernetics,part C (applications and reviews),2002,32(4):493- 498.
[11] WYLIE E B,STREETER V L.Fluid transients[M].New York:McGraw-Hill International Book Co.,1978:17- 23.
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[14] CENGEL Y A,CIMBALA J M.Fluid mechanics:fundamentals and applications[M].Boston:McGraw-HillHigher Education,2006:341- 342.
[15] BACH J,SCHROEDER P.Pairwise testing:a best practice that isn’t[C]//Proceedings of 22nd Pacific Northwest Software Quality Conference,2004:180- 196.
[16] 刘中杰，张吉礼，赵天怡.基于风机盘管阻力特性的空调水流量测试方法[J].建筑热能通风空调，2015,34(4):1- 5.
[17] 王佳明.空调冷冻站iBES监控系统标准化设计及在线评价方法[D].大连：大连理工大学，2018:16- 38.
Hydraulic dynamic response characteristics of chilled water pipe network in variable flow air conditioning system
Abstract: 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.
Keywords: variable flow air conditioning system; chilled water pipe network; hydraulic characteristic; dynamic response; hydraulic response time; graph theory;
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