| Energy conservation is a strategic task, it is received seriously attention by various countries in the world. The intelligent building energy conservation is the worldwide big current and the general trend, simultaneously is also China reforms and the development urgent need, is the China constructs one which the enterprise develops key and the hot spot in the 21st century. Because the building energy consumption holds the very great proportion in the overall energy building, The air conditioning energy consumption holds the nearly 50% proportions in the building energy consumption. Therefore, the air conditioning energy conservation has become the urgent research and the solution question.Variable air volume's historical development and the research present situation of saving energy were main introduced in this paper, discusses three controlling ways of variable air volume: constant pressure, variable pressure, total volume. It brings up several questions according to the research subject: first, established monitor and control system of air conditioning, second, research saving energy of variable pressure volume, third, optimized question of blast.About to the research of variable pressure mainly stays in the experiment aspect in the world, combining the Johnson Controls devices and realized variable pressure ways by programming in this paper. Firstly, established air condition's mechanism and VAV Box math model through experiment way, established air damper and room math model through mechanism way. Secondly, compiled the system monitor and control ling's program with Johnson Control' software, researched the energy effect of variable pressure through experiment way. Finally established the function of energy consumption and makes computation, compared the energy effect between constant pressure and variable pressure ,optimized the blast with PID plus smith ,the energy effect of variable pressure is better than constant pressure though experiment way, the temperature achieved its goal by simulation. |
