CO2 emission rates from humans when sleeping and awake. Impact of environmental factors and age

Pawel Wargocki*, Mitsuharu Sakamoto, Xiaojun Fan, Kazuki Kuga, Kazuhide Ito, Jonathan Williams, Gabriel Beko

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Abstract

We summarize our three recent studies that determined CO2 emission rates from humans using the mass-balance model and the measured steady-state CO2 concentration. One study determined CO2 emission rates from sleeping adults; they were on average 11 L/h/person, 30-45% than for awake people at a light activity. They were relatively stable and similar to the published work and estimations using models. Two studies determined CO2 emission rates from the sedentary awake people at a light activity; they were on average 12.9-17.8 L/h/person. They were not significantly different between teenagers, young adults, and the elderly, nor when ozone and relative humidity increased. Reduced ventilation and increased CO2 significantly reduced CO2 emission rates; the changes in respiration could be the plausible reason. CO2 emission rates increased at thermal sensation departing from neutrality; increased metabolic activity could be the plausible reason. The emission rates were different from published results and estimations using models.
Original languageEnglish
Title of host publicationProceedings of Indoor Air 2022
Number of pages2
PublisherInternational Society of Indoor Air Quality and Climate
Publication date2022
Publication statusPublished - 2022
Event17th International Conference of the International Society of Indoor Air Quality & Climate - University of Eastern Finland, Kuopio, Finland
Duration: 12 Jun 202216 Jun 2022
Conference number: 17
https://indoorair2022.org/

Conference

Conference17th International Conference of the International Society of Indoor Air Quality & Climate
Number17
LocationUniversity of Eastern Finland
Country/TerritoryFinland
CityKuopio
Period12/06/202216/06/2022
Internet address

Keywords

  • Carbon dioxide
  • Human emissions
  • Ventilation
  • Age
  • Environment

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