Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.enbuild.2019.109473
Title: Occupancy-based zone-level VAV system control implications on thermal comfort, ventilation, indoor air quality and building energy efficiency
Authors: Anand, Prashant
Sekhar, Chandra 
Cheong, David 
Santamouris, Mattheos
Kondepudi, Sekhar
Keywords: Science & Technology
Technology
Construction & Building Technology
Energy & Fuels
Engineering, Civil
Engineering
Occupancy
VAV control
Ventilation rate
IAQ
Building energy efficiency
Thermal comfort
MANAGEMENT
RESET
Issue Date: 1-Dec-2019
Publisher: ELSEVIER SCIENCE SA
Citation: Anand, Prashant, Sekhar, Chandra, Cheong, David, Santamouris, Mattheos, Kondepudi, Sekhar (2019-12-01). Occupancy-based zone-level VAV system control implications on thermal comfort, ventilation, indoor air quality and building energy efficiency. ENERGY AND BUILDINGS 204. ScholarBank@NUS Repository. https://doi.org/10.1016/j.enbuild.2019.109473
Abstract: © 2019 Elsevier B.V. Variable Air Volume (VAV) system serving multiple zones often shows energy wastage issues as it is not able to maintain ventilation requirements efficiently at part-load due to inaccurate assumptions of occupancy and inherent inability to detect and use actual occupancy in control. In this study, the operational data of a typical VAV system has been analysed to study the implications of VAV system on energy efficiency and Indoor Air Quality (IAQ), when controlled using occupancy. Three occupancy-based overlapping operational strategies are proposed: 1. Supply air of the zone is optimized to meet the minimum ventilation requirement and to maintain the zone temperature below 24 °C for both occupied and unoccupied zones; 2. In accordance with the 1st strategy, the supply air of the unoccupied zone, if unoccupied for more than 60 min but less than a day, is further minimized to maintain the zone temperature below 28 °C; and 3. In accordance with the 2nd strategy, no ventilation air is supplied to zones that are unoccupied for the entire day. Based on the outcome of this study, the proposed occupancy-based operational strategies show energy saving potential in the range of 23–34%, 19–38%, 21–31% and 24–34% for classroom, computer room, open office, and closed office zones respectively. The primary contribution of this study is the occupancy-based zone level VAV optimization process and its exploration of possible decision-making tools to save energy.
Source Title: ENERGY AND BUILDINGS
URI: https://scholarbank.nus.edu.sg/handle/10635/173300
ISSN: 03787788
18726178
DOI: 10.1016/j.enbuild.2019.109473
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Occupancy-based zone level VAV system control implications on TC, Vent, IAW and Bldg Energy Efficiency, Energy and Buildings 204 (Sept 2019).pdfPublished version4.03 MBAdobe PDF

CLOSED

None

SCOPUSTM   
Citations

15
checked on Oct 15, 2020

Page view(s)

69
checked on Oct 15, 2020

Download(s)

1
checked on Oct 15, 2020

Google ScholarTM

Check

Altmetric


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