Method and system for feeding and ventilating with air a plant of an aircraft auxiliary power unit
View Patent ↗A system and a method for ventilating a plant including an auxiliary power unit (APU) in an aircraft compartment are disclosed. The compartment is ventilated in an independent manner with individualized air feeds to each item of equipment concerned. According to one embodiment, a system for feeding and ventilating an aircraft auxiliary power source plant includes an APU and items of equipment mounted in connection with the APU. The APU is fitted with an exhaust nozzle which leads into a gas discharger mounted outside the compartment. Separate and independent ducts channel air between air inlets made through the compartment, and the APU and items of equipment. At least one ventilation duct that is separate and independent from the other ducts is coupled to an air inlet of the compartment in order to ventilate the APU and the items of equipment of the plant.
1. A method for feeding and ventilating with air an aircraft auxiliary power source plant comprising an auxiliary power unit (APU), items of equipment connected to the APU, and at least one item of equipment that requires an air feed, the aircraft auxiliary power source plant being arranged in an aircraft compartment and the APU being fitted with an exhaust nozzle which leads into a gas discharger mounted outside the compartment from an opening of the compartment, the method comprising:
supplying air feed to the APU and to each of the at least one item of equipment that requires an air feed through an independent and separate air feed passageway,
wherein external ventilation of the APU and of the items of equipment of the aircraft auxiliary power source plant is carried out through at least one ventilation air passageway that is independent and separate from the air feed passageways and from other ventilation air passageways,
wherein the external ventilation of the APU and of the items of equipment of the aircraft auxiliary power source plant is carried out through the ventilation air passageway after a cooling air/fluid exchange, and
wherein the air/fluid exchange is arranged at an air inlet of the compartment of the aircraft.
2. The feeding and ventilation method according to claim 1 , wherein a discharge of the air from the compartment to the outside of the aircraft is caused by a jet pump effect.
3. The feeding and ventilation method according to claim 1 , wherein the air/fluid exchange at the inlet of the compartment, dedicated to the ventilation and discharge of the air is arranged respectively upstream and downstream in the compartment relative to the APU.
4. A system for feeding and ventilating with air an aircraft auxiliary power source plant comprising:
an auxiliary power unit (APU);
items of equipment mounted in connection with the APU and at least one item of equipment that requires an air feed, the aircraft auxiliary power source plant being arranged in an aircraft compartment and the APU being fitted with an exhaust nozzle which leads into a gas discharger mounted outside the compartment from an opening of the compartment,
wherein separate and independent air feed ducts channel the air between air inlets, made through the compartment, and the APU and each of the at least one item of equipment which requires an air feed,
wherein at least one ventilation duct that is separate and independent from the air feed ducts and from other ventilation ducts is coupled to an air inlet of the compartment, and
wherein at least one ventilation duct connects an air inlet of the compartment to an air/fluid exchanger in order to ventilate the APU and the items of equipment of the aircraft auxiliary power source plant after a cooling air/fluid exchange in the air/fluid exchanger.
5. The system for feeding and ventilating with air according to claim 4 , wherein a gas discharger has a mouth resting on the opening of the compartment formed to cause an air vacuum in the compartment capable of creating air flows and evacuating the air flows into the gas discharger by a jet pump effect.
6. The system for feeding and ventilating with air according to claim 4 , wherein the air/fluid exchanger traversed by the air dedicated to the ventilation, the items of equipment, the APU and a discharge opening are positioned respectively from upstream to downstream, and the items of equipment are distributed in the compartment.