How Much Heat Does Commercial Aircraft APU Produce?

In summary, the amount of heat produced by a commercial aircraft APU can vary depending on the type of engine and APU used. Some APUs can produce up to 1800 hp and the exhaust gas can reach temperatures as high as 760°C. The temperature of the exhaust gas can also vary depending on the type of aircraft and APU.
  • #1
Seth.T
25
2
how much heat roughly does commercial aircraft APU produce? I'm interested in an average and maximum range. Any experts?
 
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  • #2
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 
  • #3
So kind of you Greg, sadly no. I am really interested to know what's the atmospheric temperature of the commercial plane tail, APU surrounding when APU is running at maximum potential.
 
  • #4
It depends on the plane. Not every aircraft is the same. Not every airliner is the same. For instance a GE-90B engine has enough power to make a 747 fly which actually uses 4 engines. But these GE-90Bs are only used in Boeing 777s. The APU does the work of the engine when needed. As every engine is different, the type of APU used is different. Hope this helps.
 
  • #5
First post you asked how much heat
An APU might be as large as 1800 hp
so probably 3X that much heat leaves with the exhaust gas.
http://www.smartcockpit.com/download.php?path=docs/&file=B737-APU_Systems_Summary.pdfThird post you asked what temperature
gas turbine exhaust can be as high as 600 to 700 C
http://www.boeing-727.com/Data/systems/infoapu.html
APU EGT Operating GTCP85-98 and 98C 98CK
Maximum 760 °C 710 °C
Continuous 710 °C 663 °C
 

1. How is heat produced in a commercial aircraft APU?

The heat in a commercial aircraft APU is produced through the combustion of fuel. The APU, or auxiliary power unit, is a small jet engine located at the rear of the aircraft, and it uses fuel to create the necessary power to run the aircraft's systems while on the ground.

2. How much heat does a commercial aircraft APU produce?

The amount of heat produced by a commercial aircraft APU can vary depending on the type of aircraft and the APU's power rating. On average, an APU can produce anywhere from 40,000 to 100,000 BTUs (British Thermal Units) per hour.

3. What is the heat output of a commercial aircraft APU compared to the main engines?

The heat output of a commercial aircraft APU is significantly lower than that of the main engines. While the main engines can produce tens of thousands of horsepower, the APU is only responsible for providing power to the aircraft's systems and does not contribute to propulsion.

4. How is the heat from the APU managed to prevent overheating?

The heat from the APU is managed through a system of air flow and cooling. The APU has its own dedicated air intake and exhaust, and the air is cooled through a heat exchanger before being released into the environment. The APU also has built-in sensors to monitor its temperature and will automatically shut down if it reaches a dangerous level.

5. How does the APU heat affect the overall temperature inside the aircraft?

The APU heat is typically not a significant factor in the overall temperature inside the aircraft. The air conditioning system, which is separate from the APU, is responsible for maintaining a comfortable temperature for passengers and crew. However, in extreme temperatures or if the APU is not functioning properly, it can contribute to the overall temperature inside the aircraft.

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