DocumentCode :
2335938
Title :
A hybrid dynamic condenser model for transient analysis and model-based controller design
Author :
Ding, Xudong ; Duan, Peiyong ; Cai, Wenjian ; Yan, Jia
Author_Institution :
Shandong Key Lab. of Intell. Building, Shandong Jianzhu Univ., Jinan, China
fYear :
2012
fDate :
18-20 July 2012
Firstpage :
1124
Lastpage :
1129
Abstract :
In this paper, a hybrid modeling approach is proposed to describe the dynamic behavior of the two phase flow condensers used in air-conditioning and refrigeration systems. The model is formulated based on fundamental energy and mass balance governing equations, and thermodynamic principles, while some constants and less important variables that change very little during normal operation, such as cross-sectional areas, mean void fraction, the derivative of the saturation enthalpy with respect to pressure, etc., are lumped into several unknown parameters. These parameters are then obtained by experimental data using least squares identification method. The proposed modeling method takes advantages of both physical and empirical modeling approaches, can accurately predict the transient behaviors in real-time and significantly reduce the computational burden. Other merits of the proposed approach are that the order of the model is very low and all the state variables can be easily measured. These advantages make it easy to be applied to model based control system design. The model validation studies on an experimental system show that the model predicts the system dynamic well.
Keywords :
air conditioning; control system synthesis; enthalpy; least squares approximations; refrigeration; thermodynamics; air-conditioning systems; fundamental energy equations; hybrid dynamic condenser model; least squares identification method; mass balance governing equations; mean void fraction; model based control system design; refrigeration systems; saturation enthalpy; thermodynamic principles; transient analysis; two phase flow condensers; Equations; Liquids; Mathematical model; Predictive models; Refrigerants; Temperature measurement; Temperature sensors; Condenser; Dynamic model; Experimental test; Fundamental governing equations; Least squares method; Model reduction; Parameter identifications; Two-phase flow;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2012 7th IEEE Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4577-2118-2
Type :
conf
DOI :
10.1109/ICIEA.2012.6360892
Filename :
6360892
Link To Document :
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