The Establishment Of Control Model And Research On Commercial Building Central Air-conditioning Chilled Water System

Commercial building central air-conditioning running evaluation standard for comfort and low energy consumption,for the system security and the effect is at the expense of high energy consumption,the cause of this kind of unreasonable energy consumption are various,such as the design of the limitations of chilled water system,at the end of time-varying and improper operation strategy,and so on causes the hydraulic imbalance problem is very serious,the saving energy running of the air conditioning system has a very big obstacle.In order to be able to solve the problem of the hydraulic imbalance,based on the hydraulic calculation as a starting point,on the basis of the theory of fluid network topology for central air conditioning chilled water system network diagram,the hydraulic calculation visualization,and analysis system of each component under different status of job characteristics,valves,pumps,pipe fitting characteristics to build mathematical model in the system,define the working condition of similar area,the water system state can be quick to judge.Based on the sensitivity of system,the implementation of control system performance of migration,formation of Jacobi matrix model of system debugging,the value in the matrix can clearly describe influence quantity and pipe network system in the control volume.Based on Hacnet platform to verify the accuracy of the numerical solution and the initial adjustment work,and according to the experimental data on the system coupling numerical analysis,the application study on the control model.In order to reaserch the hydraulic control model can get well in practical application,for both commercial building central air-conditioning chilled water system debugging and theresearch work,through the selection of a large amount of data,introduces the incremental network to analyze the unsteady system,under different working point of the adjustability and stability of the system to conduct a comprehensive analysis,to adjust and the measures for the priority and correction,to study hydraulic balance air conditioning system has the certain reference value.