On aircraft with an ACM air conditioning, where does the final cooling take place? Is it in the ACM expansion turbine or in the ACM compressor?

  • $\begingroup$ Specifically, please elaborate on what kind of air conditioning system you're referring to. Are we talking about airliners here? Single-engine pistons? $\endgroup$
    – reirab
    Commented May 2, 2017 at 16:05
  • $\begingroup$ Yes,it is about jet engine a/c $\endgroup$
    – KM320
    Commented May 2, 2017 at 16:13
  • 3
    $\begingroup$ Related, the different temperatures in the a/c system. The last cooling occurs at the turbine stage. From this answer. $\endgroup$
    – mins
    Commented May 2, 2017 at 18:11
  • $\begingroup$ Related: aviation.stackexchange.com/a/13321/4108 $\endgroup$
    – Sanchises
    Commented May 4, 2017 at 8:11

1 Answer 1


The final cooling will be at the turbine of the ACM.

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Air passes through two heat exchangers, before finally passing through the turbine of the ACM.



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