Possibilities and Limitations of Thermally Activated Building Systems: Simply TABS and a Climate Classification for TABS

Benjamin Behrendt

    Research output: Book/ReportPh.D. thesis

    2987 Downloads (Pure)


    The strong political market drive towards energy savings in the building sector calls for efficient solutions. Using so called low temperature heating and high temperature cooling systems such as for instance thermally activated building systems (TABS) has a significant impact on the required energy source. With TABS it is possible to utilize otherwise insufficient energy sources such as waste heat or ground coupled heat exchangers.
    Today simulation of TABS is possible with most building simulation tools. However such simulations are rather time consuming and cost intensive. It would be beneficial to have a tool that can be used to assess the general usability of TABS considering only rough boundary conditions. The Simple Simulation Tool in combination with the Climate Classification for TABS introduced in this thesis offer this solution.
    The Simple Simulation Tool has proven to be a valid tool for the early assessment for the use of TABS in modern Buildings. Not only is it possible to runs simulations in accordance to ISO 11855-4 but also to determine the minimal required plant sizes for cooling, the duration until overheating, the maximum internal temperatures for insufficient plant sizes (using a simplified heat loss approach) and the maximum allowed cooling power to prevent undercooling.
    The climate Classification can be used to predict the building behaviour throughout Europe. Based on a very select number of building characteristics it can be seen if heating, cooling or both will be mostly needed to operate the building within acceptable boundaries. It will also allow the user to see if dehumidification will be needed for undisturbed operation of TABS.
    With the combination of both tools it is possible to provide a holistic evaluation of a building proposal at a very early design stage.
    Original languageEnglish
    PublisherTechnical University of Denmark, Department of Civil Engineering
    Number of pages158
    ISBN (Print)9788778774545
    Publication statusPublished - 2016
    SeriesB Y G D T U. Rapport


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