Validation of a numerical model of acoustic ceiling combined with TABS

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    Thermally-Active Building Systems (TABS) have proven to be an energy-efficient
    and economical cooling and heating solution for commercial buildings. However,
    acoustic comfort is often jeopardized in such buildings, due to the thermal
    requirements of the system. More knowledge is required to understand to which
    extent a layer of hanging sound absorbers will impede the heating and cooling
    performance of the system, and how this translates on the thermal comfort for the
    In order to address these issues, this study focuses on validation of a new TRNSYS
    component (Type Ecophon Acoustic Elements) developed to simulate partially
    covered suspended ceilings such as hanging sound absorbers. The tool is validated by numerically modelling a set of similar experiments carried out in full-scale by a previous study. For this, a total of 12 scenarios from two case studies have been modelled, with varying suspended ceiling coverage ratios, type of suspended ceilings, internal heat gains and TABS water supply temperatures.
    The results obtained from the simulations are very close to the experimental results. The first set of measurements analyzed the effect of the above-mentioned parameters in the heat flow from TABS; the difference between the numerical results and measurements is in the range of -6.9% to +5.2%. The second evaluates the impact on TABS cooling capacity coefficient and room temperatures. The simulated cases led to absolute differences +4.3% higher in average for the cooling capacity coefficient. The operative temperature in the room is particularly well estimated, with a maximum relative difference of +0.3°C in total of five scenarios.
    Original languageEnglish
    Title of host publicationCLIMA 2016 - Proceedings of the 12th REHVA World Congress
    EditorsPer Kvols Heiselberg
    Number of pages10
    Publication date2016
    ISBN (Print)87-91606-36-5
    Publication statusPublished - 2016
    Event12th REHVA World Congress - Aalborg, Denmark
    Duration: 22 May 201625 May 2016


    Conference12th REHVA World Congress
    Internet address


    • Thermally-active building systems
    • Concrete core cooling
    • Thermal comfort
    • Acoustic comfort
    • Cooling capacity coefficient
    • Sound absorbers
    • Freehanging acoustic elements
    • TRNSYS Type


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