TY - JOUR
T1 - Influence of mechanical ventilation system on indoor carbon dioxide and particulate matter concentration
AU - Yu, Conson K.H.
AU - Li, Min
AU - Chan, Vincent
AU - Lai, Alvin C.K.
PY - 2014/6
Y1 - 2014/6
N2 - Common ventilation strategies may fail to maintain indoor air quality when atmosphere is heavily polluted by particulate matter. This paper evaluates the performances of common constant air volume (CAV) system and variable air volume (VAV) system when carbon dioxide and particles are significantly present in outdoor environment. Major system parameters including filter efficiency, occupancy number, ventilation air rate, and outdoor particle concentration are thoroughly examined. Firstly, a full-scale chamber experiment is performed to investigate the dynamics of CO2 and airborne particles under steady and non-steady scenarios. The result is further validated with a previously-developed state-space model. Secondly, an exhaustive case study is conducted using an established mathematical model. In order to reduce CO2 concentration, both CAV and CO2-based demand-controlled VAV may cause an undesirable increase in particle concentration when outdoor air is heavily polluted by particles. This dilemma requires further studies on the optimization of ventilation schemes. © 2014 Elsevier Ltd.
AB - Common ventilation strategies may fail to maintain indoor air quality when atmosphere is heavily polluted by particulate matter. This paper evaluates the performances of common constant air volume (CAV) system and variable air volume (VAV) system when carbon dioxide and particles are significantly present in outdoor environment. Major system parameters including filter efficiency, occupancy number, ventilation air rate, and outdoor particle concentration are thoroughly examined. Firstly, a full-scale chamber experiment is performed to investigate the dynamics of CO2 and airborne particles under steady and non-steady scenarios. The result is further validated with a previously-developed state-space model. Secondly, an exhaustive case study is conducted using an established mathematical model. In order to reduce CO2 concentration, both CAV and CO2-based demand-controlled VAV may cause an undesirable increase in particle concentration when outdoor air is heavily polluted by particles. This dilemma requires further studies on the optimization of ventilation schemes. © 2014 Elsevier Ltd.
KW - IAQ
KW - Particulate matter
KW - State-space model
KW - Ventilation
UR - http://www.scopus.com/inward/record.url?scp=84897427428&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84897427428&origin=recordpage
U2 - 10.1016/j.buildenv.2014.03.004
DO - 10.1016/j.buildenv.2014.03.004
M3 - RGC 21 - Publication in refereed journal
C2 - 32288026
SN - 0360-1323
VL - 76
SP - 73
EP - 80
JO - Building and Environment
JF - Building and Environment
ER -
