scholarly journals Modeling and Generalized Predictive Control for Chilled Water in Central Air-conditioning System

2013 ◽  
Vol 6 (4) ◽  
Author(s):  
Bai Yan ◽  
Ren Qingchang ◽  
Ma Ke
Keyword(s):  
Predictive Control ◽  
Air Conditioning ◽  
Generalized Predictive Control ◽  
Air Conditioning System ◽  
Chilled Water ◽  
Central Air Conditioning

Application Analysis of Chilled Water Storage Technology in the Transformation of Central Air Conditioning System

2012 ◽  
Vol 608-609 ◽  
pp. 1097-1105
Author(s):  
Kai Jing Liu ◽  
Qun Li Zhang ◽  
De Ying Li
Keyword(s):  
Air Conditioning ◽  
Water Storage ◽  
Cost Comparison ◽  
Air Conditioning System ◽  
Storage Technology ◽  
Application Analysis ◽  
Chilled Water ◽  
Central Air Conditioning ◽  
Saving Effect ◽  
Operation Cost

This article introduces the specific application of central air conditioning chilled water storage technology in the actual central air conditioning engineered reconstruction. The author analyzes the energy-saving effect of application of central air conditioning chilled water storage technology and the economy of central conditioning renovation project. Operation cost comparison shows that water storage air conditioning system saves money more above 35% than conventional air conditioning system.

Modeling and Simulation of Chilled Water System for Central Air Conditioning

2012 ◽  
Vol 204-208 ◽  
pp. 4280-4285 ◽  
Author(s):  
Jian Min Sun ◽  
Chun Dong Zhang ◽  
Ze Yang Zhou
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Pid Control ◽  
Air Conditioning ◽  
Water System ◽  
Air Conditioning System ◽  
Chilled Water ◽  
Central Air Conditioning ◽  
Chilled Water System ◽  
Saving Effect

Considering the central air conditioning system is highly susceptible to interferences from external environment, this paper established a dynamic mathematical model for chilled water system with the air conditioning area, fan coil unit and air conditioning area interference factors. Selection of chilled water system as a controlled object, designed the energy saving control system for central air-conditioning. The inputs of PID controller are deviation of actual temperature and setting temperature, and the change rate of the deviation; output is operation frequency of pump. Experiment shows that, PID control system in 90% time operating at a frequency of 10Hz-40Hz, average is 32.5Hz. Compared with no control system, the pump power consumption was reduced 33.9%.In conclusion, PID control in the central air conditioning system have a good energy saving effect.

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