Auxiliary Power Unit How It Works

To supply conditioned air to the cabin as a source of electrical power for the aircraft and lastly as a means of engine starting.

Auxiliary power unit how it works. An auxiliary power unit apu is a device on a vehicle that provides energy for functions other than propulsion they are commonly found on large aircraft and naval ships as well as some large land vehicles. 2 thoughts on how it works. Auxiliary power unit apu dedi e s says. The auxiliary power unit is a jet turbine uses the same fuel for wing turbines.

An apu auxiliary power unit works in a similar way to an aircraft s engine and has three roles. When handling auxiliary power units the test facility and testing are critical to safeguarding the reliability and functionality of the apu. Others can produce 28 v. January 24 2016 at 20 21 dear sir apu gtcp b 737 500 with.

Testing facilities have to be fully correlated and approved by the oem s our facilities are designed to test auxiliary power units at various conditions including a full performance condition with the confidence of producing reliably confirmed data. An apu auxiliary power unit is a small turbine engine installed to provide supplementary power. How an auxiliary power unit works. Aircraft apus generally produce 115 v alternating current ac at 400 hz rather than 50 60 hz in mains supply to run the electrical systems of the aircraft.

Apu is connected to ac generator through a gear box. Since cold air is heavier than warm air the apu has to work very hard to push the air up above the bunk. A flap is opened allowing air inlet which is compressed and provided by apu through bleed control valve. Reliable all electric auxiliary power unit that not only saves fuel but delivers unmatched driver comfort previously unavailable in an electric unit.

Many of these roles are used routinely in day to day flying but the apu also serves as backup in the event of a. The apu air tower improves air circulation reducing apu run time by up to 22.