CO2 generation rate in Chinese people

Carbon dioxide (CO2) metabolically produced by humans has been widely used as a tracer gas for determining ventilation rates in occupied rooms. Among other necessities, the method requires good estimates of human CO2 generation rates. An empirically derived equation is widely used to calculate the C...

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Bibliographic Details
Published in:Indoor air 2014-12, Vol.24 (6), p.559-566
Main Authors: Qi, M. W., Li, X. F., Weschler, L. B., Sundell, J.
Format: Article
Language:English
Subjects:
Adult
Air Pollution, Indoor - analysis
Asian Continental Ancestry Group
Basal Metabolism
Carbon dioxide
Carbon Dioxide - metabolism
China
Chinese people
Empirical equations
Error analysis
Estimates
Female
Human
Human metabolic CO2 production
Humans
Indoor
Indoor air quality
Male
Males
Mathematical analysis
Metabolic rate
Metabolism
Models, Biological
Nishi equation
Respiration
Tracer gas
Ventilation
Ventilation rate
Young Adult
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Summary:Carbon dioxide (CO2) metabolically produced by humans has been widely used as a tracer gas for determining ventilation rates in occupied rooms. Among other necessities, the method requires good estimates of human CO2 generation rates. An empirically derived equation is widely used to calculate the CO2 generation rate. However, there are indications that this equation is not valid for young Chinese people. In this study, we measured the CO2 generation rate of 44 young Chinese people at two typical activity levels, quiet sitting and relaxed standing. We found that the commonly used empirical equation overpredicted CO2 generation rates, but could be corrected with a factor of 0.75 for Chinese females and of 0.85 for Chinese males. The variance for measured CO2 sitting was much smaller than for standing, and hence, we concluded that sitting yields more precise CO2 generation estimates. The relative contributions of sex, height, weight, and metabolic rate were analyzed. We concluded that the error in estimating metabolic rate is responsible for most of the difference in measured generation of CO2 from the empirical equation's predictions.
ISSN:0905-6947
1600-0668
DOI:10.1111/ina.12110