Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15121
Title: Optimal and robust control of outdoor ventilation airflow rate for improving energy efficiency and IAQ
Authors: Wang, S 
Xu, X
Keywords: Demand-controlled ventilation
Economizer
Energy efficiency
Indoor air quality
Robust control
Issue Date: 2004
Publisher: Pergamon Press
Source: Building and environment, 2004, v. 39, no. 7, p. 763-773 How to cite?
Journal: Building and environment 
Abstract: Combining demand-controlled ventilation (DCV) and economizer control can achieve adequate and even better indoor air quality with minimum cooling/heating energy consumption in buildings. The control instability during the transition processes between different control modes is among the major difficulties faced when combining DCV control with economizer control in applications. The practical energy benefit is another concern when using free cooling in the subtropical climate like Hong Kong. A robust control strategy, using "freezing", gain scheduling, I-term reset and feedback transition control for different transition processes, is developed addressing the instability problems. The energy benefit of using economizer control is evaluated by over one year's comparison tests on two air-handling units in a building.
URI: http://hdl.handle.net/10397/15121
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2004.01.033
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