Oostplein Metro Station, Netherlands

A key function of smoke ventilation systems is to ensure escape routes remain free from smoke. The usual solution for escape stairways is a pressurisation system to prevent smoke from entering. This, however, was not possible at the Oostplein metro station in Rotterdam, because of an escape hatch at the top of the stairs, which if opened would release the pressure and allow the staircase to smoke log.

Cyclone induction fan An induction fan system that would create a barrier at the stairway’s doorway CFD slice

Colt’s team thought laterally and designed an induction fan system that would create a barrier at the stairway’s doorway to stop the smoke from entering the escape stairs. A CFD study confirmed the correct angle of throw from the fans and convinced the customer of the validity of this solution.

Colt supplied and installed the system, which consists of Cyclone induction fans and controls. The solution was such a success, that it is now included in the plans for ten stations on the North-South Line project in Amsterdam,  which is in its design phase.

Colt’s team thought laterally and designed an induction fan system that would create a barrier at the stairway’s doorway to stop the smoke from entering the escape stairs. A study using Colt's Orca tool confirmed the correct angle of throw from the fans and convinced the customer of the validity of this solution.

CFD modelling with ORCA