The Performance of Diffuse Ceiling Inlet and other Room Air Distribution Systems

The paper analyses different room air distribution systems, and describes a design chart which can be used for the evaluation of variables as air quality, air velocity and temperature gradient as a function of flow rate and temperature difference in the supply system. The design chart can also be used for analysing other system parameters as e.g. system capacity and noise.

The paper addresses the diffuse ceiling inlet and five other air distribution systems, namely mixing ventilation from a wall-mounted terminal, mixing ventilation from a ceiling-mounted diffuser, mixing ventilation from a ceiling-mounted diffuser with a swirling flow, displacement ventilation from a wall-mounted low velocity diffuser and vertical ventilation from a ceiling-mounted textile inlet. All these systems can be used in the case of cooling of the room.