Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23570
Title: A transient ventilation demand model for air-conditioned offices
Authors: Wong, LT 
Mui, KW 
Keywords: Energy saving
Occupant load
System optimization
Ventilation
Issue Date: 2008
Publisher: Pergamon Press
Source: Applied energy, 2008, v. 85, no. 7, p. 545-554 How to cite?
Journal: Applied energy 
Abstract: Ventilation to supply fresh air in an air-conditioned office consumes a considerable portion of energy in an air-conditioning system and affects the indoor-air quality (IAQ). The ventilation demand is primarily related to the occupant load. In this study, the ventilation demands due to occupant load variations were examined against certain IAQ objectives using the mass balance of carbon dioxide (CO2) volume fractions in an air-conditioned office. In particular, this study proposed a transient ventilation demand model for occupant load, with the parameters determined from a year-round occupant load survey in Hong Kong. This model was applied to evaluate the performance of energy saving in different operating schedules of ventilation systems for typical office buildings in Hong Kong. The results showed that the energy consumption of a ventilation system would be correlated with the transient occupant load and its variations in the air-conditioned office. The ventilation system, with schedules taking account of the transient occupant loads, would offer a reduction in energy consumption up to 19% as compared with an operating schedule that assumed a steady occupant-load in the office during working hours. In both cases, the same IAQ objective was achieved.
URI: http://hdl.handle.net/10397/23570
ISSN: 0306-2619
EISSN: 1872-9118
DOI: 10.1016/j.apenergy.2007.07.010
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

18
Last Week
0
Last month
0
Citations as of Sep 24, 2017

WEB OF SCIENCETM
Citations

15
Last Week
0
Last month
0
Citations as of Sep 22, 2017

Page view(s)

28
Last Week
2
Last month
Checked on Sep 24, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.