How Much Heat Does Commercial Aircraft APU Produce?

[Seth.T]

how much heat roughly does commercial aircraft APU produce? I'm interested in an average and maximum range. Any experts?

 

[Greg Bernhardt]

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?

 

[Seth.T]

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.

 

[Shafat Hasan]

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.

 

[jim hardy]

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