English

The document consists in the Proceedings of the 2000 AIVC conference, which took place in The Hague (The Netherlands) in September 2000. It contains 61 articles corresponding to the speeches given during the Conference, and a summary of the discussions in the different sessions.

This paper deals with a computer simulation of airflow and indoor environment in livestock buildings. Simulation results have been analysed and visualized with a Virtual reality visualization . The definition of virtual reality is given first , then the presentation of the 3 Virtual reality systems possibly used for the visualization, and finally a simulation tool.
5 cases were selected to demonstrate the different simulation and visualisation possibilities for people form the industry.

In so far as a CFD analysis is becoming more and more complex. The presentation of the results must be adapted according to the audience. This paper gives first different methods of analysis and an overview of different levels for the presentation of CFD results. Examples of complex flow visualizations illustrate that paper.

This paper deals with the effect of discharging the air from a diffuser elevated above the floor. The temperatures have been measured and the airflow patterns visualised close to a diffuser for displacement ventilation, results from the whole-field method (using infrared thermography) were images of different colours representing different temperatures of the air close to the diffuser.. The aim of the measurements was to see how the elevations of the diffuser above floor level and the thermal jet length of the supply could affect the near zone.

Concerning pollution in Hong Kong, the situation is particularly serious in public transfer locations such as public taxi transfer interchanges. Those locations are normally built at ground level under large building complexes, and poorly ventilated. The exhaust gas from vehicles are trapped and the air within those locations is smoky, filthy, and harmful for the passengers. This paper deals with a study on pollutant dispersion and distribution inside that type of sites at off-peak and peak hours. Measurement and analysis of field data are presented.

This paper deals with an experiment made in a rest room located in the living quarter of a Norwegian oil platform in the North Sea. The project was to get an area for the non-smokers with no odour of cigarette fumes : a non smoker could then sit next to a smoker when placed upstream the airflow.
It was decided to install a variable air volume (VAV) system regulated via a general air quality sensor.The sensor was located adjacent to the exhaust slot nearest to the non-smoking area.

In this paper measurement of local ventilation index and air exchange efficiency is presented. That work shows that with carefully design solutions, health risks for restaurant workers and bartenders can be considerably reduced. High ventilation efficiencies have been obtained thanks to the separation of non-smoking and smoking areas with air-curtains.

The comparison of indoor temperatures measured in different Beijing buildings without air conditioners allowed those conclusions : the indoor temperature is different according to the floor at which a room is located , a high insulation of external walls and roof, along with a proper location of fenestrations and window shading can reduce incidence of solar radiations and improve indoor climates of the room.

For the protection of workers against the excessive radiation heat, local ventilation is used . But the distribution of locally supplied air has to be designed so as not to interfere with the production process. The design of a local air supply ( air shower) is based on operational measurements of thermal conditions realised on the working place of operators.
The analysis of the the operators'heat stress was made by using the WBGT-index (Wet Bulb Globe Temperature index)

The main aim of the Tip-Vent project was to provide a contribution o the creation of improved boundary conditions for the application of mechanical ventilation systems with good levels of performance. The project has led to a better understanding of the true performance of ventilation systems, why they perform as they do and what improvements are achievable. The Tip-Vent source book synthetises the findings of the projects participants.