Three dimensional numerical simulation of turbulent air flow in ventilated room, by means of 2-equation model.

Turbulent recirculating flows in many types of ventilated rooms are numerically simulated three-dimensionally by means of k-e 2-equation turbulence model. The results obtained from numerical simulation are compared with those given by model experiments concerned with air velocity and contaminant diffusion.

The feasibility of using a photoelectric cigarette smoke detector for energy efficient air quality control.

The object of this study was to determine the feasibility of using a smoke sensor to monitor and control cigarette smoke levels in occupied spaces and also to determine whether the use of such a detector could result in energy savings. A smoke detector was built and tested. The experimental results show that the smoke sensor output is a function of cigarette smoke concentration and that the smoke sensor gives a rapid and continuous response.