Development of a moisture buffer value model (MBM) for indoor moisture prediction

Zu, Kan; Qin, Menghao; Rode, Carsten; Libralato, Michele

doi:10.1016/j.applthermaleng.2020.115096

Cited by 30 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In both cases the computational effort is to large to be used in optimization procedures or in statistical analyses. One solution could be the simplification of the hygrothermal model, like the one proposed in [23]. The here presented results confirmed that the buildings with low levels of insulation have larger variations in their results in the multiyear, as shown in [13], which concluded that using a single representative year could be misleading when calculating the buildings energy labelling.…”

Section: Discussionsupporting

confidence: 72%

“…WUFI Plus, developed by Fraunhofer Institute for Building Physics, is based on the HMT model defined by Künzel in [17]. The whole building model has been validated several times [18,19], compared with other software tools [20,21] and accepted as a valid comparison tool to evaluate new materials [22] or simplified calculation methods [23]. The coupling of the wall HMT model and the building model allows to evaluate the effects of liquid water (driving rain or from other sources) and vapour concentration (from internal loads) on the energy balance of the whole building.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Multiyear Weather Data Effects on Hygrothermal Building Energy Simulations Using WUFI Plus

et al. 2021

Self Cite

View full text Add to dashboard Cite

Transient building energy simulations are powerful design tools that are used for the estimation of HVAC demands and internal hygrothermal conditions of buildings. These calculations are commonly performed using a (often dated) typical meteorological year, generated from past weather measurements excluding extreme weather conditions. In this paper the results of multiyear building simulations performed considering coupled Heat and Moisture Transfer (HMT) in building materials are presented. A simple building is simulated in the city of Udine (Italy) using a weather record of 25 years. Performing a multiyear simulation allows to obtain a distribution of results instead of a single number for each variable. The small therm climate change is shown to influence thermal demands and internal conditions with multiyear effects. From this results it is possible to conclude that weather records used as weather files have to be periodically updated and that moisture transfer is relevant in energy and comfort calculations. Moreover, the simulations are performed using the software WUFI Plus and it is shown that using a thermal model for the building envelope could be a non negligible simplification for the comfort related calculations.

show abstract

Section: Discussionsupporting

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Evaluation of Multiyear Weather Data Effects on Hygrothermal Building Energy Simulations Using WUFI Plus

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Sorption isotherm and moisture retention curve are objective physical quantities conforming to the theoretical principles of continuum physics, which can be further used directly in the moisture balance equation [ 31 ]. Therefore, such data usually serve as input parameters for computational models of moisture transport [ 57 ]. On the other hand, these parameters alone do not make it possible to assess the effects of interior plasters on the interior microclimate directly.…”

Section: Resultsmentioning

confidence: 99%

Functional Properties of SAP-Based Humidity Control Plasters

et al. 2021

View full text Add to dashboard Cite

The application of materials with high moisture storage capacity close to the interior surface presents a prospective passive method for improving indoor relative humidity conditions. In this paper, lime-cement plasters containing three different types of superabsorbent polymers (SAPs) in varying dosages are introduced and their mechanical, hygric, and thermal characteristics are analyzed in a relation to microstructure. The experimental results show a significant effect of both SAP amount and chemical composition on all functional properties of studied plasters. The incorporation of 1.5% of SAP may induce up to 2.5 better moisture buffering, thus significantly improving the passive humidity control capability. Considering overall functional parameters of SAP-modified plasters, the dosage of 1 wt.% can thus be viewed as a rational compromise between the moisture storage capability and mechanical properties. The obtained wide sets of parameters can be utilized directly as input data of computational models suitable for the assessment of the interior microclimate of residential and administrative buildings.

show abstract

“…Relative humidity (RH) is the main parameter needed for evaluating thermal comfort and moisture performance. One of the passive methods to keep moisture in the acceptable level in order to improve thermal comfort is to use building materials with a moisture buffering capacity [20]. Some researchers have concluded that building materials such as gypsum board, ceiling tiles, furniture, and carpet with adsorption/desorption capability of indoor VOCs can affect the indoor air quality [21] Hemp concrete is one of the materials with high moisture buffering capacity that with hygric and pollutant behavior can increase the performance of a building in terms of moisture and IAQ, as well as thermal comfort [22].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Energy, Indoor Air Quality, and Moisture Performance for a Three-Story Building Using an Integrated Model, Part Two: Integrating the Indoor Air Quality, Moisture, and Thermal Comfort

2021

View full text Add to dashboard Cite

In this paper, an integrated model that coupled CONTAM and WUFI was developed to assess the indoor air quality (IAQ), moisture, and thermal comfort performance. The coupling method of CONTAM and WUFI is described based on the exchange of airflow rate control variables as infiltration, natural and mechanical ventilation parameters between heat and moisture flow balance equations in WUFI and contaminant flow balances equations in CONTAM. To evaluate the predictions of the integrated model compared to single models of CONTAM and WUFI, four scenarios were used. These scenarios are airtight-fan off, airtight-fan on, leaky-fan off, and leaky-fan on, and were defined for a three-story house subjected to three different climate conditions of Montreal, Vancouver, and Miami. The measures of the simulated indoor CO2, PM2.5, and VOCs obtained by CONTAM; the simulated indoor relative humidity (RH), predicted percentage of dissatisfied (PPD), and predicted mean vote (PMV) obtained by WUFI; and those obtained by the integrated model are compared separately for all scenarios in Montreal, Vancouver, and Miami. Finally, the optimal scenarios are selected. The simulated results of the optimal scenarios with the integrated model method (−28.88% to 46.39%) are different from those obtained with the single models. This is due to the inability of the single models to correct the airflow variables.

show abstract

Development of a moisture buffer value model (MBM) for indoor moisture prediction

Cited by 30 publications

References 22 publications

Evaluation of Multiyear Weather Data Effects on Hygrothermal Building Energy Simulations Using WUFI Plus

Evaluation of Multiyear Weather Data Effects on Hygrothermal Building Energy Simulations Using WUFI Plus

Functional Properties of SAP-Based Humidity Control Plasters

Assessing the Energy, Indoor Air Quality, and Moisture Performance for a Three-Story Building Using an Integrated Model, Part Two: Integrating the Indoor Air Quality, Moisture, and Thermal Comfort

Contact Info

Product

Resources

About