English

One part of this paper deals with the contribution of the products of consumption on indoor air pollution and the available data collected in that field . The second part deals with the methodology used to evaluate the sanitory characteristics of the buildings materials.

The investigation of the performance and energy saving of dessicant air-conditioning system was the aim of that study. That type of sytem is well-known in thailand, it is composed of a silica gel bed, a split type air-conditioner, air ducts and a blower. For that experimental analysis, tests were conducted during several days with relatively similar ambient conditions. The percentages of return air, outdoor air , indoor air mixed to the air leaving the dessicant and dessicant bed thickness have been adjusted. The results of that simple economic analysis are presented.

In this paper a methodology has been developed to estimate schedules for generation rates and flow parameters using short term testing. Two techniques were evaluated using simulated data. The preferred parameter estimation method - providing average hourly source generation rates and day-to-day variations - was applied to three different types of commercial buildings. Predictions and field measurements were compared.

The way outdoor air is distributed in classrooms has a major impact on IAQ and thermal comfort of pupils. In this paper the indoor environment in the classroom is investigated using confluent jet ventilation. Measurement of air speed, air temperature and tracer gas concentrations have been carried out under different conditions along with CFD simulations to provide additional information on IAQ and thermal comfort. Those results are compared.

For that paper, experimental and numerical studies on thermal comfort and indoor air quality were performed in a lecture room with cooling loads when the operating conditions are changed. The results have been compared and showed a reasonable agreement with each other. From those results, the authors found that the increment of the discharge angle of 4-way cassette-air conditioner makes uniformity of the thermal comfort worse, but scarcely affects IAQ. The variation of the discharge airflow rarely affected thermal comfort and IAQ

A chair-based personalized ventilation system that can potentially be applied in theatres, cinemas, aircrafts and even offices is the subject of that experimental study. For the experiments eight different air terminal devices (ATDs) were compared, the perceived air quality improved greatly when cool air was served directly to the breathing zone. Future applications of that ventilation system can be envisaged.

The results of a field study about environmental comfort investigations in classrooms are presented in this paper. Thermal, acoustic, visual and air quality investigations were carried out in 17 high-schools and university classrooms in the Provincia di Torino, during the regular lesson periods and during the heat period. A subjective survey was performed at the same time. The results were compared.

In this paper, through CFD simulations, movement and evaporation of small droplets in the room air are investigated. The authors present a modified drift-flux model. Their numerical simulations reveal the characterization of the distribution of the large evaporating droplets in the ventilated room air : a combination of settling feature when droplets are first generated and released, and dispersion feature after the droplets are evaporated to be either very fine or become droplet nuclei.
According to the diameter of droplets , the dispersion or settling feature is dominant.

The flow field of industrial ventilation hood induced by the combination of extract-flow and crosswind is affected by the oblique angle of the hood's set-up. The size and scope of the capture zone of toxic gases are highly influenced by the extract velocity at the hood opening and the angle of the opening to the direction of the environmental air flow. This paper presents the results of the capture efficiency calculated by numerical method.

This paper is a review of the existing methods and techniques that allow the reproduction in laboratory of the real behaviour of filters, mainly the electret filters. First, the principles of the ways the electret filters work are described, along with their performances when installed. Then the testing methods for filters are presented with the differences between the performances measured in laboratory and in-situ. Finally, the results of intercomparison tests organized by Cetiat 's company in 2004 for Eurovent on the basis of EN 779 Annex A - test methods- are presented.