A Study Of Applied Program Of VAV Control In Intelligent Buildings

Intelligent building is developing in high speed in China, and the Variable Air Volume air condition system is adopted more and more for its economy of energy. Because of all kinds of problems in the process of building and using, users could not take the full advantage of the VAV system. It is urgent to analyze the VAV system's development and the pivotal technique completely and deeply, to sum up engineering case and study programming, consequently promoting the development of the technique steadily.The content of this study is the applied control program of VAV system, based on the ALC's WebCTRL system. The experimental equipment was founded by the hardware and software of ALC system. I designed the automation system and control program, and installed the equipment.hi the designing of applied control program of VAV system, I analyzed the maincontrol method of VAV system------the static pressure control method and thedisadvantage of the static pressure control method-the lack of fresh-air, the failure of air organization, and the unsteadiness of the system running. Based on the analysis above, I introduce the TRAV concept of T.B.Hartnian, and analyze its characteristics of this control theory. Considering the present control status of VAV system in our country, I bring up the calculate algorithm, and put forward the practical TRAV control program. I simulate the TRAV control program and the static pressure control program on the experimental equipment.Moreover, I introduced COD into the VAV system control program, and further improved the energy-saving effect of VAV system.The aim of this study is to put the control programs into the actual projects, and to seek the more reliable and applied control programs. I have practiced project design, drawing design and program design. All my programs have passed computer simulations and experimental simulations.