Modelling indoor air and hygrothermal wall interaction in building simulation: Comparison between CFD and a well-mixed zonal model

Steeman, Hendrik-Jan; Janssens, Arnold; Carmeliet, Jan; Paepe, Michel De

doi:10.1016/j.buildenv.2008.05.002

Cited by 57 publications

(34 citation statements)

References 11 publications

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“…When no hysteresis is modelled it can be expressed as a function of the relative humidity. The liquid moisture content w liq and the water vapour content w vap in the porous material can be related to the total moisture content w through equations (8) and (9) taking into account that w = w liq + w vap and Φ = w liq /ρ liq + w vap /ρ vap .…”

Section: Heat and Moisture Transfer In The Airmentioning

confidence: 99%

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Sensitivity analysis of CFD coupled non-isothermal heat and moisture modelling

Belleghem

Steeman

et al. 2010

Building and Environment

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Section: Heat and Moisture Transfer In The Airmentioning

confidence: 99%

“…A new trend in HAM modelling is the coupling of these models to BES (building energy simulation) models or CFD (Computational Fluid Dynamics) models depending on the application aimed at. Both modelling approaches were evaluated by Steeman et al [8]. Coupling HAM models with BES is useful when the impact of moisture on energy use in a building is studied.…”

mentioning

confidence: 99%

Sensitivity analysis of CFD coupled non-isothermal heat and moisture modelling

Belleghem

Steeman

et al. 2010

Building and Environment

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“…Indoor humidity control materials were firstly studied in Japan for cultural heritage protection and subsequently expanded to the chemical, textile and building industry. Lately, according to the performed studies based on measurements (Cerolini et al 2010) or simulations (Steeman et al 2009) several authors refer to the beneficial properties of buildings materials such as bricks, aerated autoclaved concrete, wood, and plasters for moderation of interior humidity.…”

Section: Introductionmentioning

confidence: 99%

Moisture Buffering Potential of Plasters for Energy Efficiency in Modern Buildings

Fořt

Doleželová

Černý

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Moisture level significantly affects durability of constructions, their thermal performance and quality of indoor air. Since building envelopes are subjected to a moisture gradient, additional ventilation systems are employed to maintain relative humidity on the desired level. Although modern advanced ventilation systems provide sufficient air exchange rate, their wider application is in conflict with sustainability development principles due to high energy demands. Moreover, according to the European legislation related to the Nearly Zero Energy Buildings (European Directives 2002/91/EC and 2010/31/EU), air tightness of building envelopes in order to provide high thermal resistance leads to large moisture loads in building interiors. Among other factors, a high level of relative humidity has negative effect on the work efficiency and health of building inhabitants. A detailed insight into building materials behavior during cyclic moisture loading was accessed within this study. The moisture buffering values of three interior plasters were investigated in order to describe influence of plasters on moderation of indoor environment. Particular materials were loaded according to the NORDTEST protocol by 8/16 h loading schema at 70/30% RH. Here, the excellent moisture buffer classification was obtained for lightweight perlite plaster (PT) with the highest total open porosity. However, contrary to the higher total open porosity of renovation plaster (PS), the core plaster (CP) achieved higher moisture buffer capacity than PS. This discrepancy refers to the influence of the pore size distribution which is, besides the total open porosity, essential for a detailed characterization of moisture buffering potential of building materials. Based on the results of Mercury intrusion porosimetry, a correlation between pore size distribution and moisture buffer value was revealed.

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“…The measurement results from this case were used to validate a CFD (computational fluid dynamics) model of a vertical downward blowing air curtain. Past studies [4][5][6][7] showed that CFD can be a useful tool for heat transfer assessment in buildings and building applications. This CFD model was then used to perform a parameter study from which the correlation between various parameters (outlet velocity, nozzle width, door geometry) and the heat transfer can be determined.…”

Section: Introductionmentioning

confidence: 99%