Journal
10TH INTERNATIONAL SYMPOSIUM ON HEATING, VENTILATION AND AIR CONDITIONING, ISHVAC2017
Volume 205, Issue -, Pages 2254-2258Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.proeng.2017.10.069
Keywords
Air change rate; Tracer gas; Residential building
Funding
- national key project of the Ministry of Science and Technology, China [2016YFC0700500]
- National Natural Science Foundation of China [21207097]
- Ministry of Housing and Urban-Rural Development of the People's Republic of China [2016-K1-017]
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Air change rate is an important factor in indoor environment with regards to occupants' health. In order to study the association of air change rate in homes and building characteristics, a large scale air change rate measurements were carried out during Sept. 2013-Jan. 2016 in Tianjin, China. 410 homes were investigated and indoor environment were measured. Carbon dioxide concentration in homes was continuously measured for 24 hours. Air change rate was calculated by using CO2 produced by occupants as tracer gas. In the whole home, air change rates during sleeping time averaged 0.61 +/- 1.05 h(-1) (median=0.32 h(-1), n=340). In the bedrooms, air change rate during sleeping time were substantially higher, averaging 0.81 +/- 1.33 h(-1) (median=0.43 h(-1), n=390). Months trends of whole home and bedroom air change rates differed. Air change rates were higher in smaller homes. Formaldehyde and TVOC concentration in homes with higher air change rate were lower. (C) 2017 The Authors. Published by Elsevier Ltd.
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