A design guide for thermally induced ventilation.

A design guide for displacement ventilation (thermally induced ventilation ) has been prepared. It is based on quasi stationary experiments carried out in the Sulzer Infra laboratory in Winterthur. The significant design parameters identified by factorial analysis are the air flow rate, the internal load, the convective part of the internal load and to a lesser extent the room height. Using a linearized polynom representation for the temperature increase near the floor as well as for the vertical temperature gradient in the occupied zone a design nomogram has been obtained. Within its range of application the design nomogram also applies for displacement ventilation systems combined with cooled ceilings. The design guide is published in german and french language and is one of the major outputs of the Swiss research program on "Energy Relevant Air Movements in Buildings (ERL)".