ventilation

The programme of the AIVC Workshop: Ventilation for Indoor Air Quality and Cooling held in Sydney, Australia, on 23 March 2018.

Slides of the morning sessions at the AIVC Workshop: Ventilation for Indoor Air Quality and Cooling held in Sydney, Australia, on 23 March 2018:

• Session 1: Ventilation for indoor air quality
• Session 2: Ventilation for indoor air quality and health

Slides of the afternoon sessions at the AIVC Workshop: Ventilation for Indoor Air Quality and Cooling held in Sydney, Australia, on 23 March 2018:

• Session 3: Ventilation for cooling
• Session 4: Global performance of buildings and the role of ventilation

The Proceedings of the 38th AIVC Conference "Ventilating healthy low-energy buildings", held in Nottingham, UK, 13-14 September 2017.

The importance of reducing the ingress of outdoor pollution into the indoor environment is becoming increasingly important as concerns rise regarding the acute and chronic health effects of air pollution. In general, people in developed countries spend typically 90% or more of their time indoors, with the most susceptible individuals, such as the elderly and those with pre-existing medical conditions, spending almost all of their time indoors.

Experiments are presented on turbulent buoyant free-line and wall plumes, whereby the buoyancy source is emitted from a horizontal line source, in one case free of the presence of a wall and in the other placed immediately adjacent to a wall. The dynamics of turbulent entrainment, whereby ambient fluid is mixed in to the plume, are explored. The velocity field and scalar edge of the plumes are measured. From this the time-averaged plume-width and volume flux are compared.

Where residential developments rely on opening windows to control overheating, there can be a compromise between allowing excessive noise ingress with windows open, or excessive temperatures with windows closed. This problem is exacerbated by the move towards better insulated, more airtight buildings and the need, particularly in urban areas, to consider development on noisier sites. A working group has been formed by the Association of Noise Consultants to provide guidance on acoustic conditions and design when considering both the provision of ventilation and prevention of overheating.