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

    37 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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