Good point I guess once you reach ambient then the air conditioner should be the only heat transfer mechanism (I forgot to add there are air flow shut off valves so we can stop the air stream from into the intercooler). So now the problem becomes designing a air conditioner for the enclosure.
I have a sealed (pressure vessel if you will) enclosure with electronics (1500-2000W) that is currently designed to be cooled via an air to air intercooler using high flow rates we guess the unit will provide a 5-10 degree temperature rise to amb. If the amb temp is max 55C the inner vessel is...