Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: Part II - Verification and numerical studies

Carey J. Simonson (Corresponding Author), Mikael Salonvaara, Tuomo Ojanen

Research output: Contribution to journalArticleScientificpeer-review

35 Citations (Scopus)

Abstract

As simultaneous heat and mass transfer between building envelopes and indoor air is complicated and expensive to measure in laboratory and field experiments, a numerical model is important in understanding and extrapolating experimental results. In this paper a numerical model that solves simultaneous heat and mass transfer between building envelopes and indoor air is verified using the field measurements presented in Part I of this paper. The verification results show that the model is able to predict the transfer of water vapor, CO2, and SF6 between the building envelope and air. The model is then applied to investigate the humidity, comfort, and air quality in a bedroom of a wooden building located in four European countries (Finland, Belgium, Germany, and Italy). The numerical results show that moisture transfer between indoor air and the hygroscopic structure significantly reduces the peak indoor humidity (up to 35% RH), percent dissatisfied with warm respiratory comfort (up to 10%) and the percent dissatisfied with indoor air quality (up to 25%).
Original languageEnglish
Pages (from-to)161 - 185
Number of pages25
JournalJournal of Thermal Envelope and Building Science
Volume28
Issue number2
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

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Mass transfer
Heat transfer
Air
Air quality
Numerical models
Atmospheric humidity
Wooden buildings
Steam
Water vapor
Moisture
Experiments

Cite this

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title = "Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: Part II - Verification and numerical studies",
abstract = "As simultaneous heat and mass transfer between building envelopes and indoor air is complicated and expensive to measure in laboratory and field experiments, a numerical model is important in understanding and extrapolating experimental results. In this paper a numerical model that solves simultaneous heat and mass transfer between building envelopes and indoor air is verified using the field measurements presented in Part I of this paper. The verification results show that the model is able to predict the transfer of water vapor, CO2, and SF6 between the building envelope and air. The model is then applied to investigate the humidity, comfort, and air quality in a bedroom of a wooden building located in four European countries (Finland, Belgium, Germany, and Italy). The numerical results show that moisture transfer between indoor air and the hygroscopic structure significantly reduces the peak indoor humidity (up to 35{\%} RH), percent dissatisfied with warm respiratory comfort (up to 10{\%}) and the percent dissatisfied with indoor air quality (up to 25{\%}).",
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Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope : Part II - Verification and numerical studies. / Simonson, Carey J. (Corresponding Author); Salonvaara, Mikael; Ojanen, Tuomo.

In: Journal of Thermal Envelope and Building Science, Vol. 28, No. 2, 2004, p. 161 - 185.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope

T2 - Part II - Verification and numerical studies

AU - Simonson, Carey J.

AU - Salonvaara, Mikael

AU - Ojanen, Tuomo

PY - 2004

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AB - As simultaneous heat and mass transfer between building envelopes and indoor air is complicated and expensive to measure in laboratory and field experiments, a numerical model is important in understanding and extrapolating experimental results. In this paper a numerical model that solves simultaneous heat and mass transfer between building envelopes and indoor air is verified using the field measurements presented in Part I of this paper. The verification results show that the model is able to predict the transfer of water vapor, CO2, and SF6 between the building envelope and air. The model is then applied to investigate the humidity, comfort, and air quality in a bedroom of a wooden building located in four European countries (Finland, Belgium, Germany, and Italy). The numerical results show that moisture transfer between indoor air and the hygroscopic structure significantly reduces the peak indoor humidity (up to 35% RH), percent dissatisfied with warm respiratory comfort (up to 10%) and the percent dissatisfied with indoor air quality (up to 25%).

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