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    CO2 concentrations in a multifamily building in Porto, Portugal: occupants' exposure and differential performance of mechanical ventilation control strategies

    TitleCO2 concentrations in a multifamily building in Porto, Portugal: occupants' exposure and differential performance of mechanical ventilation control strategies
    Publication TypePapers in International Journals
    Year of Publication2019
    AuthorsBelmonte J. F., Barbosa R., and Almeida, Manuela G.
    Abstract

    An adequate supply of fresh outdoor air is important to create healthy and comfortable indoor building environments. Currently, most of the residential buildings in mild climate European countries, such as Portugal or Spain, remain naturally ventilated. Distinct concerns have emerged in the building community regarding the indoor air quality (IAQ) in these buildings since several studies have shown that they are often poorly ventilated. The main cause has been identified as occupants' different window opening behaviour, which can vary notably from one apartment to the next. This work presents a comparative method for evaluating occupants' exposure to CO2 concentration levels in existing buildings based on the comparison of cumulative frequency distribution curves. Indoor CO2 concentration levels recorded over 17 months in the bedrooms and living rooms of eight apartments of a naturally ventilated residential building located in Porto (Portugal) were used as experimental input data for developing the method and to calibrate the IAQ performance of an EnergyPlus building model. The calibrated building model exhibited a good agreement with the recorded data on the apartments, reporting maximum Root Mean Square Errors (RMSE) for the majority of the apartments below 5 and 10% for the living rooms and bedrooms, respectively.

    JournalJournal of Building Engineering
    Volume23
    Pagination114-126
    Date Published2019-01-11
    PublisherElsevier
    ISSN2352-7102
    DOIhttps://doi.org/10.1016/j.jobe.2019.01.008
    Keywordsbuilding simulation, CO2 concentrations, CO2-based demand controlled ventilation (DCV) strategy, EnergyPlus, Occupants' window opening patterns
    RightsrestrictedAccess
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 25 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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