地温中央空调系统变风量智能控制应用研究

发布时间：2018-05-23 19:16

本文选题：地温空调 + 现场总线　；参考：《内蒙古科技大学》2014年硕士论文

【摘要】：空调作为耗能大户，在日常生活中广泛应用。在当今大力倡导节能环保的时代，，进行空调系统节能控制策略研究，具有明显的经济意义。地温中央空调以节能实力强、适应能力强、以及优越的价格优势，在世界各国范围内广泛提倡并应用，地温空调的热源为地下水资源更加减少能耗。设计中在空调末端采用压力无关型调节方式，通过改变风量的方式满足空气负荷的变化。针对空调末端系统采用变风量控制方式，进一步达到节能的效果。空调系统采用网络化控制方式，基于PROFIBUS现场总线技术，构建了网络化地温空调系统方案，增加系统可靠性，使操作简单，可以实现多机联网。凸显智能化。主站采用西门子S7-300，从站采用LETC控制房间温度，主站与从站之间采用PROFIBUS-DP进行通讯，上位机监控与主站之间的通信协议为MPI。采用WINCC作为其监控软件，硬件的设计针对系统现场采集的信号，分析现场设备型号，并完成模块选型，软件设计主流程，并将模糊智能控制算法在实验室仿真模拟。在变风量末端房间温度控制系统中，针对温度的时变、大惯性、非线性、滞后等问题，本文先后设计模糊自适应PID控制器、Smith预估补偿控制器，最后结合两种控制算法，改进型Smith预估智能控制器的设计组合解决了温度滞后、参数时变带来不稳定的问题，改进型Smith预估补偿器克服了模型不匹配、容易受到外界干扰等问题，实现了智能化。通过仿真研究，结果显示，系统动态响应快，良好的稳定效果，有较强的适应性。并在实验室进行温度控制的模拟运行，达到了较好的控制效果。为实现智能建筑领域节能环保进行有益探索。
[Abstract]:Air conditioning, as a large energy user, is widely used in daily life. In the era of energy saving and environmental protection, it is of great economic significance to study the energy saving control strategy of air conditioning system. Ground temperature central air conditioning is widely advocated and applied in the world because of its strong energy saving, strong adaptability and superior price advantages. The heat source of ground temperature air conditioning is groundwater resources to reduce energy consumption. In the design, the air load is changed by changing the air volume by adopting the pressure independent adjustment mode at the end of the air conditioning system. The variable air volume control method is adopted in the air conditioning terminal system to achieve the effect of energy saving. Based on the technology of PROFIBUS field bus, the network ground temperature air conditioning system is constructed in the air conditioning system with network control mode, which increases the reliability of the system, makes the operation simple and can realize the networking of multiple computers. Highlight intelligence. The main station adopts Siemens S7-300, the slave station uses LETC to control the room temperature, the master station communicates with the slave station by PROFIBUS-DP, and the communication protocol between the host computer and the master station is MPI. The WINCC is used as the monitoring software, the hardware design is aimed at the signal collected from the system, the model of the field equipment is analyzed, the module selection is completed, the software is designed, and the fuzzy intelligent control algorithm is simulated in the laboratory. In the variable air volume end room temperature control system, aiming at the time-varying, large inertia, nonlinear, lag and other problems of temperature, this paper successively designs a fuzzy adaptive PID controller Smith predictor compensation controller, and finally combines two control algorithms. The design and combination of the improved Smith predictive intelligent controller solves the problem of temperature lag and the instability caused by the time-varying parameters. The improved Smith predictor overcomes the problems of model mismatch and is easy to be disturbed by the outside world. The simulation results show that the system has fast dynamic response, good stability and strong adaptability. The simulation of temperature control is carried out in the laboratory, and good control effect is achieved. In order to realize the intelligent building field energy conservation and environmental protection to carry on the beneficial exploration.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP273;TB657.2

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