Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: Part I - Field measurements

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

    Research output: Contribution to journalArticleScientificpeer-review

    52 Citations (Scopus)

    Abstract

    In this paper, measurements are presented which quantify the mass transfer of tracer gases and water vapor between indoor air and a permeable and hygroscopic building envelope. The transfer of tracer gases through the envelope requires the entire envelope to be permeable, while the transfer of moisture requires sufficient hygroscopic mass to be in contact with the indoor air. The results show that mass transfer can improve the indoor air quality and climate. The diffusion of gases through the building envelope significantly increases the effective ventilation rate for poorly ventilated rooms, but only moderately increases the effective ventilation for well-ventilated rooms. Moisture transfer, on the other hand, has a significant influence on the indoor humidity for both poorly and well-ventilated rooms.
    Original languageEnglish
    Pages (from-to)63 - 101
    Number of pages39
    JournalJournal of Thermal Envelope and Building Science
    Volume28
    Issue number1
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed

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