中央空调系统变风量与变频控制仿真研究

发布时间：2018-05-20 16:13

本文选题：变风量空调系统 + 最小静压控制　；参考：《华南理工大学》2014年硕士论文

【摘要】：变风量（variable air volume，VAV）空调系统因其具有巨大的节能能力，逐渐成为国内外空调系统的主流。但是，VAV空调系统控制环路多，系统整体性控制要求较高，特别是各控制环路的耦合严重，影响了系统稳定性，因此限制了VAV空调系统在国内的应用。而影响VAV控制系统稳定性的关键环节是静压控制回路，它的控制性能好坏直接关系到VAV空调系统的可用与否。本文首先介绍分析VAV空调系统正常运行所必须具备的控制环节，然后重点叙述了三种变静压控制方式（最小静压控制法、VVVP风量控制法、总风量控制法）。通过比较分析这三种控制方式，阐述了各种控制方式的优缺点，并最终认为最小静压控制法在节能能力和控制性能上都比其它两种方法要好。本文还对VAV空调系统的各组成环节进行机理数学分析，建立了VAV空调系统主要环节的Simulink仿真模型，并利用所建立的这些模型，搭建成一个VAV空调系统仿真模型。这一仿真系统是以空调风管网模型为核心环节的模型，VAV系统的各个部分被管网模型联系在一起。利用VAV空调系统仿真模型，模拟夏季工况下的VAV空调最小静压控制系统的运行。通过对仿真结果的分析，证明最小静压控制方式对VAV空调系统控制的有效性。
[Abstract]:Variable air volume VAVV air conditioning system has become the mainstream of domestic and international air conditioning systems because of its huge energy saving ability. However, there are many control loops in VAV air conditioning system, and the overall control requirement is high. Especially, the coupling of each control loop seriously affects the stability of the system, which limits the application of VAV air conditioning system in China. The key to the stability of VAV control system is the static pressure control loop. Its control performance is directly related to the availability of VAV air conditioning system. This paper first introduces and analyzes the control links necessary for the normal operation of VAV air conditioning system, and then focuses on three kinds of variable static pressure control methods (minimum static pressure control method, total air volume control method and total air volume control method). Through the comparison and analysis of these three control methods, the advantages and disadvantages of each control method are expounded, and it is concluded that the minimum static pressure control method is better than the other two methods in energy saving ability and control performance. In this paper, the mechanism of VAV air conditioning system is analyzed, and the Simulink simulation model of the main links of VAV air conditioning system is established. Using these models, a VAV air conditioning system simulation model is built. The simulation system is based on the air conditioning pipe network model as the core link of the model VAV system is connected by the pipe network model. The VAV air conditioning system simulation model is used to simulate the operation of VAV air conditioning minimum static pressure control system in summer. Through the analysis of simulation results, it is proved that the minimum static pressure control method is effective for VAV air conditioning system control.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657.2

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