How much fuel does the APU burn?
According to United Continental, APU uses 150 to 400+ kg of fuel per hour while Ground Power Units (GPU) provided by the airport use less than 20 kg of fuel per hour.
How much fuel does a 737 APU burn per hour?
Q: About how much fuel per hour does a medium-sized aircraft such as the 737 burn? A: In round numbers, a 737 will burn 5,000 pounds (750 gallons) an hour.
Does APU save fuel?
The APU provides the energy to turn on the heater, the AC, and even the TV without having to keep the truck in idle mode. That saves on gallons of diesel fuel, approximately 0.25 per hour with an APU as opposed to 1.1 without one, reduces air pollution, and makes it easier to comply with idling laws and regulations.
Why does an APU use less fuel than a propulsion engine?
The APU consumes less fuel because it doesn’t have to contribute thrust to the airframe. Many APUs have the same generator capacity as a propulsion engine. But they don’t produce thrust. They can run at an optimum RPM for the generator requirements. On a short flight each main engine might consume an average of 1260 kg/hour.
How much power does a B737 Apu produce?
The APU for the A320 and B737 is a noisy screaming unit that produces 90 kW electrical power, 445 shaft kW. It weighs 375 lbs as well. The main difference is in the weight of the engine itself. The turbine engine of the A320/B737 APU produces 445 shaft kW and weighs 145 kg.
How much fuel does a jet engine use?
The engines can use about 850 lb/hr at idle, which from those figures is about 1/10 of fuel flow at full (takeoff) power. So the engines use about 4 times as much fuel (each) as the APU does to just provide power.
How much fuel does a 737 NG use?
To give a comparison with an engine at idle: On the 737 NG, the APU can use 240 lb/hr when under load. It is rated at 90 kVA, same as the generator on each engine. The engines can use about 850 lb/hr at idle, which from those figures is about 1/10 of fuel flow at full (takeoff) power.