Experimental and numerical study on simultaneous temperature and humidity distributions

This paper deals first with experimental measurement performed in a test chamber to investigate the characteristics of temperature and moisture distributions. The effect of moisture accumulation in building material is studied too. Then a new approach is introduced to describe the simultaneous heat and moisture transfer. The results has been compared with a CFD model.

Influence of cooling strategies on the air flow pattern in an office with mixing ventilation

In this study, an office with mixing ventilation is considered. The CFD analyses show that for high cooling loads it is useful to couple a cold ceiling to primary air system

Predicting volatile organic compounds concentration in residential buildings (Part 2 : application of model)

Using the model developed in part 1 of this paper, the influence of material kinds, ventilation and air-cleaning device on VOC concentration in room is studied. The conclusion is that ventilation rate plays a very important role on VOCs concentration, but it affects little on VOCs emission rate.

Predicting volatile organic compounds concentration in residential buildings (Part 1 : building of model)

This paper presents a universal but simple mathematic model very useful to predict Volatile Organic Concentration in the bulk air for different conditions in residential buildings.

Particle concentration calculations using CFD - a comparison -

CFD is a suitable tool to calculate concentration in particle contaminant distribution in a room. 3 approaches are described for two types of flow problems and compared in this paper.

Modeling chemical reactions in the indoor environment by CFD

The study used CFD to examine reactions between ozone and terpenes in a room under 4 conditions. The study indicates that chemical reactions can significantly alter the concentration of air pollutants, an imperfect mixing may result in reactant and product concentrations significantly different from those predicted by the model that assumes fully mixed conditions.

Extension of the kinetic energy model for calculation of the zone average air velocity

The aim of this work was to develop a new calculation method of the zonal air velocity in ventilated room during the design stage. The verification showed a good correlation between the method and the experimental data.

Improved prediction of heat transfer in horizontal thermally unstably stratified boundary layers by resolution of the large-scale buoyant structures.

When using RANS turbulence models the mean profiles of mixed convection can be predicted with accuracy. It is more important to resolve large scale 3D structures instead of using very complex turbulence models, for the prediction of room airflow with floor heating or cooled ceiling.

Simulation tool for indoor air quality improvement in a covered swimming pool

This study consisted first in a sampling campaign that has shown the important levels of NCL3 encountered in swimming pools. Then a simulation of the NCL3 dispersion was conducted wtih the following simulation tools : TRNSYS (thermal simulation) and FLUENT (CFD simulation).

Use of predictive ventilation to evaluate the emission rates of pollutant sources in an enclosure and to reconstruct the associated concentration field

This paper presents a numerical method aiming at recreating the concentration field of a pollutant at each point of a ventilated enclosure that contains one or several pollutant sources of unknown emission rate.

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