A reliable and autonomous inerting system to protect the aircraft fuel tanks against any risk of fire or explosion
The OBIGGS is a system composed of well-proven equipment generating directly Nitrogen on board to fully protect the aircraft tanks against explosion. Autonomous, it does not require any logistics.
Based on a hollow fiber separation process, the OBIGGS allows to produce during the mission the flow of Nitrogen Enriched Air (NEA) requested to protect the aircraft. Part of the oxygen contained in the fuel tank is replaced by Nitrogen, keeping the vapours non-flammable.
The OBIGGS includes a filtration chain, a pressure & temperature controller, an oxygen sensor and air separation modules. Depending on the applications, it can integrate a Temperature Management System to condition the bleed air. Compressed air is directly tapped an aircraft air circuit and transformed into NEA that is directly distributed in the fuel tanks.
15-years experience in fuel tanks explosion reduction enables Air Liquide to support the customer also for the design the distribution system: Inerting modelling, piping sizing, NEA injection location, supply of distribution components. The use of the OBIGGS does not need any calibration or logistic operation before the flight. By means of the control of a selected set of signals generated by the OBIGGS, the crew is permanently aware of the status of the equipment.
|Cargo aircraft||Training aircraft|
|Weight||< 35 kg||< 10 kg|
up to 2 lb/min
|up to 0,2 lb/min|
|NEA||up to 1 % O2||up to 4 % O2|
|Power supply||28 Vdc||28 Vdc|
Oxygen analyzerAs part of an OBIGGS, the oxygen analyzer ensures that the system is in good working order. It analyzes the oxygen-depleted gas and sends an electrical signal reflecting the quantity of oxygen as a percentage or in partial pressure. The O2 analyzer is fitted with a zirconium oxide sensor to ensure its precision and reliability. It can operate at a wide range of pressures, from a few millibars to several bars and temperatures of up to 300°C.