Application of Fieldbus and Frequency Conversion Technology in Air-Condition VWV System

Abstract:

This paper presents a method which uses LonWorks control system and frequency converter in Central Air-Condition chilled water variable flow system. In this system, the output of frequency converter can be altered by augmenter PID control rule which is used in control of invariable difference in temperature between water supply and backwater, and the rotating speed of water pump can be changed correspondingly, so when the user load is small ,the electric energy consume can be reduced. The effect of energy-saving was visible comparing with the conventional Air-Condition chilled water constant flow system.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 3068-3072
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.3068
• Online since: September 2011
• Authors: Gui Rong Wang, Cong Zhi Zhang
• Keywords: Fieldbus, Frequency Converter, PID Control, VWV

References

[1] Jingwan Liu, Rulin Wang, Shuang Cao. Journal of Taiyuan University of Technology, 2008(1):57-59. In Chinese

[2] Hui Zhang, Jun Jin, Zhengmao Ye. Energy Conservation Technology, 2005(7):351-353. In Chinese

[3] Yuyun Li. Building Automation System.BeiJing: China Machine Press, 2006. In Chinese

[4] Shuhui Xu, Ying Yan. Journal of Beijing University of Civil Engineering and Architecture, Vol.24 No.2,2008(6):1-4. In Chinese

[5] Xiaoli Fan, Construction & Design For Project, 2010(9):62-65. In Chinese