变风量空调自动控制及节能技术相关外文翻译分析.doc

XXXX学院 毕业设计（论文）外文资料翻译 系别： 专业： 班级： 姓名： 学号： 外文出处： VAV SYSTEM ANALYSIS （用外文写） 附 件：1、外文原文；2、外文资料翻译译文。 指导教师评语： 签字： 年 月 日 注：请将该封面与附件装订成册。 外文原文（复印件） VAV SYSTEM ANALYSIS Xue Zhifeng,Chen Feng and Jiang Yi Tsinghua University Beijing+100084 China xuezhf@ ABSTRACT There are two kind of supply fan rotation speed control methods , one is the static pressure control method, the other is the float pressure control method. Simulation shows that they have different working point along the whole year. The supply air fan controlled with float pressure control method need low rotation speed and works on high efficiency, so the float pressure control method need only 30% fan operation energy of the static pressure control method .The layout of the air duct may influence the fan control method. INTRODUCTION As the VAV system is getting popular in China, many problems are rising from the design, the operation as well as controls (Jiang 1997).According to investigation on several VAV systems in Beijing, the energy consumption changes in the range as large as between factors 1 to 1.5 due to different in design and control. The supply fan rotation speed control method is one of the important factor that influence the VAV systems energy consumption. There two kind of control methods, One is the static pressure control method, which is set a static pressure at the fan export or at one point on the supply air duct. The other is the float pressure control method, using this mehthod , the supply air fan pressure head is just eaquel to the resistance of the supply air duct. The float pressure control method need the communication of the VAV box, so it is difficult to realize. Most of the VAV systems in the comerc