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| Description
| - This paper presents and explains moisture problems observed in the sub-floor space of a timber-framed kindergarten in the Central European climate. The floor structure (36 by 52 m) is suspended 0.27 m above the uncovered ground surface. The sub-floor is mechanically ventilated in one direction. Here, relative humidity constantly exceeds 95 % irrespective of the season. Furthermore, visual inspections revealed condensation and mould growth in the inlet area. A two-dimensional dynamic HAM model was written in Matlab in order to describe the sub-floor’s behaviour and evaluate possible actions. The model was validated using measured data. The results show two principal moisture sources: (1) evaporation from the ground and (2) ventilation by the outdoor air. The ground source is active throughout the year and causes gradual increase in relative humidity in the direction of the flow. The outdoor air brings in excessive moisture from spring to autumn and causes condensation on the floor structure. Two measures can be adopted to cut off the sources, keep the relative humidity below 80 % and exclude the condensation: (1) ground cover and (2) adaptive mechanical ventilation. Unfortunately, practical realization of the former in the existing narrow gap is possible only at high costs, if at all, while the latter alone cannot solve the problem.
- This paper presents and explains moisture problems observed in the sub-floor space of a timber-framed kindergarten in the Central European climate. The floor structure (36 by 52 m) is suspended 0.27 m above the uncovered ground surface. The sub-floor is mechanically ventilated in one direction. Here, relative humidity constantly exceeds 95 % irrespective of the season. Furthermore, visual inspections revealed condensation and mould growth in the inlet area. A two-dimensional dynamic HAM model was written in Matlab in order to describe the sub-floor’s behaviour and evaluate possible actions. The model was validated using measured data. The results show two principal moisture sources: (1) evaporation from the ground and (2) ventilation by the outdoor air. The ground source is active throughout the year and causes gradual increase in relative humidity in the direction of the flow. The outdoor air brings in excessive moisture from spring to autumn and causes condensation on the floor structure. Two measures can be adopted to cut off the sources, keep the relative humidity below 80 % and exclude the condensation: (1) ground cover and (2) adaptive mechanical ventilation. Unfortunately, practical realization of the former in the existing narrow gap is possible only at high costs, if at all, while the latter alone cannot solve the problem. (en)
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| Title
| - Moisture problems in a narrow gap under the suspended floor: A case study
- Moisture problems in a narrow gap under the suspended floor: A case study (en)
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| skos:prefLabel
| - Moisture problems in a narrow gap under the suspended floor: A case study
- Moisture problems in a narrow gap under the suspended floor: A case study (en)
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| skos:notation
| - RIV/68407700:21720/14:00224447!RIV15-MSM-21720___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21720/14:00224447
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Sub-floor; moisture; ground cover; ventilation; measurement; numerical simulation (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - 10th Nordic Symposium on Building Physics
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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