Windowless room Air Conditioning, Sky light only
The portable A/C units that I've seen have a 3 or 4" diameter air duct to get rid of the hot air. Usually you hang that out of a window.   If you are not looking for a permanent solution, you could connect it to the air vent hose that comes out of the back of your dryer.  You would have to switch it back to actually use the dryer.  I'm not positive but I'm guessing that the A/C unit has a condensation reservoir that you have to empty occasionally like a dehumidifier so you probably don't need to connect that to any hose or piping.