Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18881
Title: An online adaptive optimal control strategy for complex building chilled water systems involving intermediate heat exchangers
Authors: Wang, S 
Gao, DC
Sun, Y
Xiao, F 
Keywords: Adaptive optimal control
Chilled water system
Deficit flow
Energy efficiency
Online adaptive model
Issue Date: 2013
Publisher: Pergamon Press
Source: Applied thermal engineering, 2013, v. 50, no. 1, p. 614-628 How to cite?
Journal: Applied thermal engineering 
Abstract: This paper presents an adaptive optimal control strategy for online control of complex chilled water systems involving intermediate heat exchangers to enhance operation and energy performances. This optimal control strategy determines the optimal settings of the heat exchanger outlet water temperature (hot side) and the required operating number of heat exchangers and pumps in order to minimize the total energy consumption of pumps under varying working conditions. Adaptive method is utilized to update the key parameters of the proposed models online. A simulated virtual platform representing a chilled water system in a super high-rise building was established to validate and evaluate the proposed optimal strategy. Test results show that the strategy has enhanced control robustness and reliability, particularly in avoiding deficit flow problem. Significant energy of chilled water pumps is saved when compared with conventional methods.
URI: http://hdl.handle.net/10397/18881
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2012.06.010
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