English

Increasing ventilation rates do not always improve IAQ, but proper ventilation strategies are the keys to improve it. This paper discusses the impacts of ventilation on IAQ and some ventilation strategies to improve IAQ are proposed : the low-temperature air supply system, DCV (demand control ventilation) system, TSV (task supply ventilation) system.

The present study determines the particle decay and deposition rates under natural, forced ventilation and no ventilation conditions. It is the first attempt to apply this deternmination to the ventilation conditions existing in Indian urban households.
The study confirms the previous deposition rate observations and most of the values are in the range of the previous reported values.

This paper uses a CFD tool to study indoor air quality in a typical chemical laboratory. The research explores the performance of ceiling-supply mixing ventilation systems and side-wall-supply displacement ventilation with their effects on hood containment.The results of the two systems are presented.

The indoor thermal environment and energy consumption of large spaces with sidewall openings and top openings has been investigated for that study. A numerical simulation and site measurements were carried out. The results of the comparison of the two openings give the top openings superior for the airflow distribution and the improvement of IAQ.

In this paper, the vertical and horizontal spreading rates of CJV (confluent jet ventilation) over the floor are investigated using CFD (Computational Fluid Dynamics) simulations. They are compared with the spreading rates of the wall displacement ventilation (DV) system. The authors conclude that the wall confluent jet is able to cool a room with a heat load, a displacement system is not able to cope with.

In this paper a new method for ventilation measurement using an OP-FTIR (Open Path Fourier Tansform Infrared Spectroscopy) is proposed. A feasibility study was carried out and compared with the traditional measurement method using a Photoacoustic Gas Monitor. It appears that the new measuring method is feasible for practice.

The aim of this research was to acquire a method to select the optimal gas range hood through the performance test under KS (Korean standards) or pr EN (european) codes. Performance curve, noise level, capture efficiency and power consumption are analyzed.
General hoods and functional hoods are compared too.

This paper gives a summary of a detailed CFD (Computational Fluid Dynamics) of the flow around a a Computer Simulated Person (CSP) for the purpose of its validation.

For that field study, measurements of different aspects of an UFAD (UnderFloor Air Distribution) system performance were made in an office building. The results show evidence of the benefits provided by UFAD on indoor air quality.

General information about legionella and legionellosis are first given. Authors then mention techniques and methods of prevention to avoid the increase and spread of legionella in air conditioning and ventilation systems.They include preventive measures such as correct design of the system allowing regular inspection, maintenance and cleaning, as well as methods of anti-bacterial control in ventilation systems.