Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24267
Title: A model-based optimal ventilation control strategy of multi-zone VAV air-conditioning systems
Authors: Xu, X
Wang, S 
Sun, Z
Xiao, F 
Keywords: Critical zone ventilation
Demand-controlled ventilation
Model-based control
Multi-zone ventilation
Optimal temperature reset
Issue Date: 2009
Publisher: Pergamon Press
Source: Applied thermal engineering, 2009, v. 29, no. 1, p. 91-104 How to cite?
Journal: Applied thermal engineering 
Abstract: This paper presents a model-based optimal ventilation control strategy for multi-zone VAV air-conditioning systems aiming at optimizing the total fresh air flow rate by compromising the thermal comfort, indoor air quality and total energy consumption. In this strategy, one scheme is used to correct the total fresh air flow rate dynamically by utilizing the unvitiated fresh air from the over-ventilation zones based on the detected occupancy of each zone and the related measurements. At the meantime, another scheme is developed to optimize the temperature set point for the temperature control of critical zones with the aim at reducing the variation of the required fresh air fractions among all the zones and further reducing the total fresh air intake from outdoors for energy saving when the first scheme is implemented. This scheme is based on a constructed cost function relating thermal comfort, indoor air quality and total energy consumption together while the cost function is calculated based on the prediction of system responses using dynamic simplified models. Genetic algorithm is used for optimizing the temperature set point of critical zones in the optimization process. This strategy was evaluated in a simulated building and air-conditioning environment under various weather conditions.
URI: http://hdl.handle.net/10397/24267
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2008.02.017
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