Global hydraulic stability analysis for dynamic regulation in multi-zone variable air volume air-conditioning system  

作　　者：Tianyi Zhao Zhe Li Xiuming Li Honglian Peng 

机构地区：[1]Institute of Building Energy,School of Civil Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China [2]Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving,Anhui Jianzhu University,Hefei 230022,China [3]School of Metallurgy,Northeastern University,Shenyang 110819,China [4]School of Architecture,Harbin Institute of Technology,Harbin,150006,China

出　　处：《Energy and Built Environment》2024年第4期592-606,共15页能源与人工环境（英文）

基　　金：supported by the National Natural Science Foundation of China (Grant No.52,078,096);the Fundamental Research Funds for the Central Universities (Grant No.DUT20JC47);the open Foun-dation of the Key lab of Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving (Grant No.IBES2021KF03).

摘　　要：Variable air volume air-conditioning system(VAV system)has multiple control loops that interfered with each other,which has serious impacts on its actual operation effect.To solve this problem,the index of global hydraulic stability,which takes the physical quantity of the pipe network pressure and the air flow rate as reference,is proposed based on Graph theory,and a pipe network model for the hydraulic calculation is built.Then,the simulation study based on the actual operation data is carried out in MATLAB.The distribution of the pressure and the air flow in the pipe network is obtained,and the action interferences among adjacent terminal boxes are analyzed based on global hydraulic stability under damper position regulation strategy(DP strategy)and fan frequency regulation strategy(FF strategy).Results indicate that the FF strategy can decrease the total change distance of the damper position compared with the DP strategy,and then the fluctuation of the pressure and the air flow can be reduced.The contribution of this study is to provide an evaluation index of global hydraulic stability,which can also be used in other air-conditioning systems with multiple terminals and multiple control loops.

关 键 词：VAV system Global hydraulic stability Adjustment strategy VAV box damper position 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]