CO ₂ Discharge in Case of Fire Suppression for COLUMBUS APM

The COLUMBUS APM employs CO₂ stored in centralized tank or, as backup, in portable fire extinguishers (PFEX) for the suppression of eventual fire events. The conditions of the 2-phase flow of the CO₂ in the tank and in the ducting system are an important parameter for the layout of the system. In this paper the analytical and experimental work performed to determine these flow conditions and the results for the baseline fire suppression system shall be given.