English

This paper deals with a CFD study of containment of airborne hazardous materials in a ventilated room containing a downdraft table. A high Reynolds number k-epsilon turbulence model was used for the modelisation CFD predictions have been examined for several ventilation configurations Findings are presented.

For that study, six different types of in-room air cleaners (ACs) were investigated. Their ability to remove and/or inactivate airborne bacteria and fungal spores has been quantified. The efficacy of combining Acs with upper-room air Ultraviolet Germinacidal Iirradiation (UVGI) was investigated too. Tests and results are presented.

For that study, a model was developed to simulate adsorption and desorption of multicomponent organic compounds in a charcoal filter and to predict its lifetime. A method was also proposed to estimate parameter values of organic compounds with unknown properties. The comparison of the simulated and measured adsorption breakthrough curves for a multicomponent system allowed the validation of that newly developed simulation system

Minienvironments systems are reported to provide effective containment for critical contamination control. But prior to that study, little information was published or available to quantify the energy performance of such systems. In this paper, quantitative results of a study on the operation performance of a minienvironments are presented.

That research project of the CFD Lab of the University of Tennessee in collaboration with the civil aerospace medical institute (CAMI) of the Federal Aviation Administration aimed at validating the CFD prediction of the ECS-generated ventilation velocity vector flow field of a wide-body aircraft passenger cabin. Measurements were carried out in laboratory and in an identical wide-body aircraft in cruise flight at altitude. Simulations with CFD codes were conducted. The results are presented and assess CFD alogorithm/code strengths and weaknesses.

Though there is a developing interest in achieving low-energy, naturally ventilated, non-domestic buildings in order to achieve reductions in carbon dioxide emissions, those two case studies demonstrate that local authority Building Control Departments, fire authorities, insurers are reluctant finding some uncertainties about compliance of natural ventilation with the current fire regulations and codes. So the current regulatory system impacts negatively in the use of natural ventilation and prevents innovation.

The aim of that paper is the analysis of the airflow field and pressure distribution of standard mechanical interface (SMIF) enclosure in the semiconductor factory cleanroom on the one hand and the investigation of the air cleanliness inside the mini-environment. Results and conclusions are presented.

Air handling units must be added in typical HVAC systems to remove indoor air pollutants, such as volatile organic compounds (VOCs). The aim of that paper is to investigate the VOC removal efficiency of a photocatalytic filter in a HVAC system. The resullts of the experiments carried out in a stainless steel chamber are presented. It appears that photocatalytic oxidation is an attractive technique for indoor air cleaning.

The investigation in a room served by displacement ventilation system of the effect of temperature gradient on overall and local thermal comfort at different overall thermal sensations and room air temperatures was the aim of that study. It appears that temperature gradient has different influences on thermal comfort at different overall thermal sensations.

The aim of thsi paper is to study the effect of five ventilation strategies on the concentrations of VOCs emitted from a new carpet in an apartment with the VOCs emission characteristics taken from chamber test data. Numerical results show that ventilation strategies have small effect on VOCs emission from carpet.